Classification of propylene-ethylene inserts
DATE：2022/7/19 9:53:20 / READ： / SOURCE：This station
Classification of propylene-ethylene inserts
(1) Performance characteristics Propylene-ethylene block copolymer has high crystallinity, and its performance characteristics are similar to that of isotactic polypropylene, which mainly depends on the changes of ethylene content, copolymer block structure, molecular weight and distribution. PP-B generally has higher rigidity and better low temperature toughness. Compared with propylene-ethylene random copolymer, the impact strength is greatly improved, and the embrittlement temperature is much lower. The ethylene content in the propylene-ethylene block copolymer is generally in the range of 5% to 20% (mass). When the ethylene content is 2%~3%, the embrittlement temperature is -35~-22℃. Compared with HDPE, block copolymer has high heat resistance, good stress crack resistance, high surface hardness, low shrinkage and good creep resistance. The physical and mechanical properties of propylene-ethylene block copolymer are shown in Table 2- 47. The performance comparison between the block copolymer and the random copolymer is shown in Table 2-48. The properties of propylene-ethylene and ethylene block copolymers produced by Yanshan Petrochemical Company are shown in Table 2-49. Pinye Table 2-47 Physical and mechanical properties of propylene-ethylene block copolymers Domestic use/(g/10min) Melt flow rate Embrittlement temperature/℃/(kJ/m²) Charpy impact strength Medium flexural strength/GPa Turbidity/% softening point/℃0.3 -40~-10 9.8~58.9 0.45~0.51 50~90 140~142
The product propylene is connected with ①3mm V-shaped notch. ②Bending angle 30° Monolithic lattice forming Technician's Handbook Table 2-48 Performance comparison between segmented copolymer and random copolymer Softening temperature/℃ temperature/℃/1g/10min) Media activity rate - flexural strength/MPa haze/% random block random block impact strength P/(k//m")① means simply supported beam V-notch impact strength. Measured under the condition of bending angle 30 .①The random copolymer in the table refers to the result that the ethylene content (mass) is 2%.Table 2-49 Properties of propylene-ethylene block copolymer of Yanshan Petrochemical Company
Item Test Method 1330 Brand 1332 1430 Melt Flow Rate/(g/10min) ASTMD1233-65T 1.5~2.5 1.5~2.5 2~3 Embrittlement Temperature/℃ Rockwell Hardness (R) Drop Impact Strength/Tensile Strength/MPs Elongation at break/% flexural modulus of elasticity/MPa Thermal deformation temperature (0.46MPa)/℃Izod impact strength (notch)/(]/m) MPC PP-A-305 ASTM D 746-64T ASTM D 648-56 ASTM D 256-56 ASTMD 785-65T ASTM D 790-66 ASTM D638-64T ASTM D 638-64T90 -2515.7601008502002390 -2515.7601008002002310013.710505070400
25
The molding method and application of propylene-ethylene block copolymer molding plastic products) method is the same as that of isotactic polypropylene molding plastic products. It can be molded by extruder, injection molding machine, or by blow molding and spinning. In addition, the products can also be welded, electroplated, and if necessary, secondary processing can be carried out. Types of molded plastics
The class is also the same as isotactic polypropylene, but because the toughness and low temperature properties of propylene-ethylene block copolymers are better than that of homopolypropylene, for those applications in low temperature environments, the toughness of propylene-ethylene block copolymers is higher than that of polypropylene. For propylene products, priority should be given to the use of propylene-ethylene block copolymer raw materials to process products. The main products are: industrial accessories, large containers, transport boxes, blow-molded bottles and other hollow containers, extruded cables, pipes and sheets, and can also be used as films, composite films and crude fibers 47. For specific applications, please refer to the use of isotactic polypropylene products.
There are many domestic manufacturers of propylene-ethylene block copolymers, such as Beijing Yanshan Petrochemical Company, Yangzi Petrochemical Company, Liaoyang Petrochemical Fiber Company and Shanghai Petrochemical Co., Ltd.
0 Co., Ltd., Qilu Petrochemical Company, etc. Generally, any manufacturer that can produce isotactic polypropylene resin can produce block copolymerized polypropylene. 2.2.4 Grafted polypropylene Grafted polypropylene can also be called graft modified polypropylene. It is isotactic polypropylene or atactic polypropylene suspended in a solvent or dissolved in a solvent at high temperature, with organic oxide as an initiator, and methyl methacrylate or styrene, vinyl acetate and vinyl acetate. The properties of grafted polypropylene are different from the type of polypropylene used for grafting, the type, length and number of grafted segments, and the molecular weight and molecular weight distribution of grafted polypropylene. Change. Grafting elastic segments on the polypropylene molecular chain can improve the impact strength of polypropylene and improve the low temperature performance; if appropriate polar groups are grafted on the polypropylene chain, its adhesive performance can be improved.
The purpose of grafting polypropylene: one is to improve the tensile strength and impact strength of polypropylene; the other is to improve the adhesion between polypropylene and other materials. The polar branched graft copolymer based on polypropylene can not only maintain the strength characteristics, chemical resistance and weather resistance of the original polypropylene, but also can be combined with polyamide, ethylene-vinyl alcohol copolymer, metal, Bonds firmly to glass, wood and paper, etc. In addition, the grafted polypropylene also has excellent characteristics of durability in terms of aging resistance, water immersion, boiling water treatment and cooking treatment. The properties of the grafted polypropylene of Mitsui Petrochemical Company are shown in Table 2-50. The adhesive properties of polypropylene and maleic anhydride graft copolymer are shown in Table 2-51. (2) Forming methods and uses Grafted polypropylene can be extruded into pipes and sheets, extruded blown films and vacuum-formed products. In addition, it can also be used for powder coating and blending with polyethylene and polypropylene resins. The specific applications are as follows. For polypropylene products with good toughness of US$45, priority should be given to the use of propylene-ethylene block copolymer raw materials for processing products. The main products are: industrial accessories, large containers, transport boxes, blow-molded bottles and other hollow containers, extruded cables, pipes and sheets, as well as films, composite films and crude fibers. For specific applications, please refer to the use of isotactic polypropylene products. There are many domestic propylene-ethylene block copolymer manufacturers, such as Beijing Yanshan Petrochemical Company, Yangzi Petrochemical Company, Liaoyang Petrochemical Fiber Company, Shanghai Petrochemical Co., Ltd., Qilu Petrochemical Company, etc. Polypropylene resin manufacturers can produce block copolymerized polypropylene. Grafted polypropylene can also be called graft modified polypropylene. It is isotactic polypropylene or atactic polypropylene suspended in a solvent or dissolved in a solvent at high temperature, with organic oxide as an initiator, and methyl methacrylate or styrene, vinyl acetate and vinyl acetate. It is obtained by graft copolymerization. Performance characteristics The performance of grafted polypropylene varies with the type of polypropylene used for grafting, the type, length and quantity of grafted segments, and the molecular weight and molecular weight distribution of grafted polypropylene. Grafting elastic segments on the molecular chain of polypropylene can improve the impact strength of polypropylene and improve low-temperature performance; if appropriate polar groups are grafted on the molecular chain of polypropylene, its adhesive performance can be improved. The purpose of grafting polypropylene: one is to improve the tensile strength and impact strength of polypropylene; the other is to improve the adhesion between polypropylene and other materials. The polar branched graft copolymer based on polypropylene can not only maintain the strength characteristics, chemical resistance and weather resistance of the original polypropylene, but also can be combined with polyamide, ethylene-vinyl alcohol copolymer, metal, Bonds firmly to glass, wood and paper, etc. In addition, the grafted polypropylene also has excellent characteristics of durability in terms of aging resistance, water immersion, boiling water treatment and cooking treatment.
The properties of the grafted polypropylene of Mitsui Petrochemical Company are shown in Table 2-50. The adhesive properties of polypropylene and maleic anhydride graft copolymer are shown in Table 2-51. Forming methods and uses Grafted polypropylene can be extruded into pipes and sheets with extruders, extruded blown films and vacuum-formed products. In addition, it can also be used by powder coating and blending with polyethylene and polypropylene resins. The specific applications are as follows: The performance of the grafted polypropylene of Mitsui Petrochemical Company/cm The strong skin pulls with Shenlong and the semi-breaking impact strength Izod Chong EVOH is B Wedding vinyl alcohol copolymer. Table 2-51 Adhesion properties of polypropylene and maleic anhydride graft copolymer
Steel plate (SS41) Aluminum plate Copper plate Stone plate Plywood (vertical) Plywood (horizontal) Peel strength/(kN/m) Bonding conditions Nylon plate
Saponified EVA board 2.452.94 Temperature: 230°C (Nylon) 180°C (EVA) Pressure: 0.392MPa Time: 3min
Modifiers improve the properties of glass fiber reinforced polypropylene; improve the blendability of polyethylene, polypropylene and nylon, and improve the toughness of nylon. The preparation method of glass fiber reinforced polypropylene is very simple, as long as the melt flow rate
2.2.5 Polypropylene resin with glass fiber reinforced polypropylene of 3~13g/10min and glass fiber in a certain proportion (generally, the blending amount of glass fiber is in the range of 10%~30%) is mixed uniformly, and then mixed by an extruder. Plasticized uniform extrusion granulation, that is, glass fiber reinforced polypropylene. Glass fiber reinforced polypropylene performance characteristics glass fiber reinforced polypropylene has the performance shrinkage of original polypropylene in addition to
In addition, there are the following features.
①Mechanical strength, rigidity and hardness have been greatly improved. ②The maximum heat distortion temperature can reach 130℃.
③The tensile strength and bending strength are increased by nearly 2 times, and the impact strength is increased by more than 2 times. ④The product has good creep resistance. The product has a small shrinkage rate after molding, good dimensional stability, and high low temperature impact strength.
⑤ Low water absorption and excellent electrical insulation properties.
⑥ It has good anti-friction and wear resistance, and has the effect of vibration absorption and noise reduction.
⑦Compared with other kinds of thermoplastics, the relative density of glass fiber reinforced polypropylene is small, the melt fluidity is good, and the price is cheap.
The properties of glass fiber reinforced polypropylene are related to its preparation method and the length and amount of blended glass fibers. The properties of glass fiber reinforced polypropylene with different preparation methods are shown in Table 2-52. The properties of glass fiber reinforced polypropylene produced in China are shown in Table 2-53.
Table 2-52 Performance enhancement methods of glass fiber reinforced polypropylene with different production methods Item name Single screw extrusion continuous mixed twin screw extrusion 25 (3mm chopped fiber) unloader (1) 25 [fiber bundle (roving)] unloader (2) 25 [fiber bundle (roving)] unloader (3) 25 [fiber bundle (roving)] unloader nylon , polycarbonate and polyoxymethylene have similar properties, and the price is cheaper, so in the automotive, electrical and chemical industries
The automobile manufacturing industry uses injection molding machines to injection mold the front fenders, rear car emeralds, battery boxes and fan covers, tail light covers, heater covers, etc. of small cars.
②The chemical industry uses pipes, fittings, valves, pump casings, metering pumps, diaphragm pumps and filter plates for conveying various liquids.
③Agricultural machinery is used as sprayer, nozzle, diesel tank of walking tractor, funnel of water tank, cover of diesel engine vacuum cleaner, etc.
④It can be used in other mechanical power machinery, radio special equipment parts, plumbing equipment and teaching instruments.
Modified reinforced polypropylene
The production method of modified reinforced polypropylene is the same as that of glass fiber reinforced polypropylene, the difference is that a certain proportion of modifiers and additives with special properties are added in the process of producing glass fiber reinforced polypropylene. Due to the different properties of additives, the modified reinforced polypropylene produced is divided into chemically modified reinforced polypropylene, self-extinguishing reinforced polypropylene and flame retardant reinforced polypropylene. Modified reinforced polypropylene abbreviated code is MRPP
Structural formula:
CCHCH2+glass fiber+additives
(1) Performance characteristics Compared with ordinary reinforced polypropylene, the performance characteristics of modified reinforced polypropylene are as follows.
①Excellent mechanical strength and high modulus, which can be used under large loads.
② Strong adaptability to ambient temperature, the product can be used in the temperature range of -40~150℃.
③Good chemical stability.
④ It has excellent impact toughness.
(1) Performance characteristics Propylene-ethylene block copolymer has high crystallinity, and its performance characteristics are similar to that of isotactic polypropylene, which mainly depends on the changes of ethylene content, copolymer block structure, molecular weight and distribution. PP-B generally has higher rigidity and better low temperature toughness. Compared with propylene-ethylene random copolymer, the impact strength is greatly improved, and the embrittlement temperature is much lower. The ethylene content in the propylene-ethylene block copolymer is generally in the range of 5% to 20% (mass). When the ethylene content is 2%~3%, the embrittlement temperature is -35~-22℃. Compared with HDPE, block copolymer has high heat resistance, good stress crack resistance, high surface hardness, low shrinkage and good creep resistance. The physical and mechanical properties of propylene-ethylene block copolymer are shown in Table 2- 47. The performance comparison between the block copolymer and the random copolymer is shown in Table 2-48. The properties of propylene-ethylene and ethylene block copolymers produced by Yanshan Petrochemical Company are shown in Table 2-49. Pinye Table 2-47 Physical and mechanical properties of propylene-ethylene block copolymers Domestic use/(g/10min) Melt flow rate Embrittlement temperature/℃/(kJ/m²) Charpy impact strength Medium flexural strength/GPa Turbidity/% softening point/℃0.3 -40~-10 9.8~58.9 0.45~0.51 50~90 140~142
The product propylene is connected with ①3mm V-shaped notch. ②Bending angle 30° Monolithic lattice forming Technician's Handbook Table 2-48 Performance comparison between segmented copolymer and random copolymer Softening temperature/℃ temperature/℃/1g/10min) Media activity rate - flexural strength/MPa haze/% random block random block impact strength P/(k//m")① means simply supported beam V-notch impact strength. Measured under the condition of bending angle 30 .①The random copolymer in the table refers to the result that the ethylene content (mass) is 2%.Table 2-49 Properties of propylene-ethylene block copolymer of Yanshan Petrochemical Company
Item Test Method 1330 Brand 1332 1430 Melt Flow Rate/(g/10min) ASTMD1233-65T 1.5~2.5 1.5~2.5 2~3 Embrittlement Temperature/℃ Rockwell Hardness (R) Drop Impact Strength/Tensile Strength/MPs Elongation at break/% flexural modulus of elasticity/MPa Thermal deformation temperature (0.46MPa)/℃Izod impact strength (notch)/(]/m) MPC PP-A-305 ASTM D 746-64T ASTM D 648-56 ASTM D 256-56 ASTMD 785-65T ASTM D 790-66 ASTM D638-64T ASTM D 638-64T90 -2515.7601008502002390 -2515.7601008002002310013.710505070400
25
The molding method and application of propylene-ethylene block copolymer molding plastic products) method is the same as that of isotactic polypropylene molding plastic products. It can be molded by extruder, injection molding machine, or by blow molding and spinning. In addition, the products can also be welded, electroplated, and if necessary, secondary processing can be carried out. Types of molded plastics
The class is also the same as isotactic polypropylene, but because the toughness and low temperature properties of propylene-ethylene block copolymers are better than that of homopolypropylene, for those applications in low temperature environments, the toughness of propylene-ethylene block copolymers is higher than that of polypropylene. For propylene products, priority should be given to the use of propylene-ethylene block copolymer raw materials to process products. The main products are: industrial accessories, large containers, transport boxes, blow-molded bottles and other hollow containers, extruded cables, pipes and sheets, and can also be used as films, composite films and crude fibers 47. For specific applications, please refer to the use of isotactic polypropylene products.
There are many domestic manufacturers of propylene-ethylene block copolymers, such as Beijing Yanshan Petrochemical Company, Yangzi Petrochemical Company, Liaoyang Petrochemical Fiber Company and Shanghai Petrochemical Co., Ltd.
0 Co., Ltd., Qilu Petrochemical Company, etc. Generally, any manufacturer that can produce isotactic polypropylene resin can produce block copolymerized polypropylene. 2.2.4 Grafted polypropylene Grafted polypropylene can also be called graft modified polypropylene. It is isotactic polypropylene or atactic polypropylene suspended in a solvent or dissolved in a solvent at high temperature, with organic oxide as an initiator, and methyl methacrylate or styrene, vinyl acetate and vinyl acetate. The properties of grafted polypropylene are different from the type of polypropylene used for grafting, the type, length and number of grafted segments, and the molecular weight and molecular weight distribution of grafted polypropylene. Change. Grafting elastic segments on the polypropylene molecular chain can improve the impact strength of polypropylene and improve the low temperature performance; if appropriate polar groups are grafted on the polypropylene chain, its adhesive performance can be improved.
The purpose of grafting polypropylene: one is to improve the tensile strength and impact strength of polypropylene; the other is to improve the adhesion between polypropylene and other materials. The polar branched graft copolymer based on polypropylene can not only maintain the strength characteristics, chemical resistance and weather resistance of the original polypropylene, but also can be combined with polyamide, ethylene-vinyl alcohol copolymer, metal, Bonds firmly to glass, wood and paper, etc. In addition, the grafted polypropylene also has excellent characteristics of durability in terms of aging resistance, water immersion, boiling water treatment and cooking treatment. The properties of the grafted polypropylene of Mitsui Petrochemical Company are shown in Table 2-50. The adhesive properties of polypropylene and maleic anhydride graft copolymer are shown in Table 2-51. (2) Forming methods and uses Grafted polypropylene can be extruded into pipes and sheets, extruded blown films and vacuum-formed products. In addition, it can also be used for powder coating and blending with polyethylene and polypropylene resins. The specific applications are as follows. For polypropylene products with good toughness of US$45, priority should be given to the use of propylene-ethylene block copolymer raw materials for processing products. The main products are: industrial accessories, large containers, transport boxes, blow-molded bottles and other hollow containers, extruded cables, pipes and sheets, as well as films, composite films and crude fibers. For specific applications, please refer to the use of isotactic polypropylene products. There are many domestic propylene-ethylene block copolymer manufacturers, such as Beijing Yanshan Petrochemical Company, Yangzi Petrochemical Company, Liaoyang Petrochemical Fiber Company, Shanghai Petrochemical Co., Ltd., Qilu Petrochemical Company, etc. Polypropylene resin manufacturers can produce block copolymerized polypropylene. Grafted polypropylene can also be called graft modified polypropylene. It is isotactic polypropylene or atactic polypropylene suspended in a solvent or dissolved in a solvent at high temperature, with organic oxide as an initiator, and methyl methacrylate or styrene, vinyl acetate and vinyl acetate. It is obtained by graft copolymerization. Performance characteristics The performance of grafted polypropylene varies with the type of polypropylene used for grafting, the type, length and quantity of grafted segments, and the molecular weight and molecular weight distribution of grafted polypropylene. Grafting elastic segments on the molecular chain of polypropylene can improve the impact strength of polypropylene and improve low-temperature performance; if appropriate polar groups are grafted on the molecular chain of polypropylene, its adhesive performance can be improved. The purpose of grafting polypropylene: one is to improve the tensile strength and impact strength of polypropylene; the other is to improve the adhesion between polypropylene and other materials. The polar branched graft copolymer based on polypropylene can not only maintain the strength characteristics, chemical resistance and weather resistance of the original polypropylene, but also can be combined with polyamide, ethylene-vinyl alcohol copolymer, metal, Bonds firmly to glass, wood and paper, etc. In addition, the grafted polypropylene also has excellent characteristics of durability in terms of aging resistance, water immersion, boiling water treatment and cooking treatment.
The properties of the grafted polypropylene of Mitsui Petrochemical Company are shown in Table 2-50. The adhesive properties of polypropylene and maleic anhydride graft copolymer are shown in Table 2-51. Forming methods and uses Grafted polypropylene can be extruded into pipes and sheets with extruders, extruded blown films and vacuum-formed products. In addition, it can also be used by powder coating and blending with polyethylene and polypropylene resins. The specific applications are as follows: The performance of the grafted polypropylene of Mitsui Petrochemical Company/cm The strong skin pulls with Shenlong and the semi-breaking impact strength Izod Chong EVOH is B Wedding vinyl alcohol copolymer. Table 2-51 Adhesion properties of polypropylene and maleic anhydride graft copolymer
Steel plate (SS41) Aluminum plate Copper plate Stone plate Plywood (vertical) Plywood (horizontal) Peel strength/(kN/m) Bonding conditions Nylon plate
Saponified EVA board 2.452.94 Temperature: 230°C (Nylon) 180°C (EVA) Pressure: 0.392MPa Time: 3min
Modifiers improve the properties of glass fiber reinforced polypropylene; improve the blendability of polyethylene, polypropylene and nylon, and improve the toughness of nylon. The preparation method of glass fiber reinforced polypropylene is very simple, as long as the melt flow rate
2.2.5 Polypropylene resin with glass fiber reinforced polypropylene of 3~13g/10min and glass fiber in a certain proportion (generally, the blending amount of glass fiber is in the range of 10%~30%) is mixed uniformly, and then mixed by an extruder. Plasticized uniform extrusion granulation, that is, glass fiber reinforced polypropylene. Glass fiber reinforced polypropylene performance characteristics glass fiber reinforced polypropylene has the performance shrinkage of original polypropylene in addition to
In addition, there are the following features.
①Mechanical strength, rigidity and hardness have been greatly improved. ②The maximum heat distortion temperature can reach 130℃.
③The tensile strength and bending strength are increased by nearly 2 times, and the impact strength is increased by more than 2 times. ④The product has good creep resistance. The product has a small shrinkage rate after molding, good dimensional stability, and high low temperature impact strength.
⑤ Low water absorption and excellent electrical insulation properties.
⑥ It has good anti-friction and wear resistance, and has the effect of vibration absorption and noise reduction.
⑦Compared with other kinds of thermoplastics, the relative density of glass fiber reinforced polypropylene is small, the melt fluidity is good, and the price is cheap.
The properties of glass fiber reinforced polypropylene are related to its preparation method and the length and amount of blended glass fibers. The properties of glass fiber reinforced polypropylene with different preparation methods are shown in Table 2-52. The properties of glass fiber reinforced polypropylene produced in China are shown in Table 2-53.
Table 2-52 Performance enhancement methods of glass fiber reinforced polypropylene with different production methods Item name Single screw extrusion continuous mixed twin screw extrusion 25 (3mm chopped fiber) unloader (1) 25 [fiber bundle (roving)] unloader (2) 25 [fiber bundle (roving)] unloader (3) 25 [fiber bundle (roving)] unloader nylon , polycarbonate and polyoxymethylene have similar properties, and the price is cheaper, so in the automotive, electrical and chemical industries
The automobile manufacturing industry uses injection molding machines to injection mold the front fenders, rear car emeralds, battery boxes and fan covers, tail light covers, heater covers, etc. of small cars.
②The chemical industry uses pipes, fittings, valves, pump casings, metering pumps, diaphragm pumps and filter plates for conveying various liquids.
③Agricultural machinery is used as sprayer, nozzle, diesel tank of walking tractor, funnel of water tank, cover of diesel engine vacuum cleaner, etc.
④It can be used in other mechanical power machinery, radio special equipment parts, plumbing equipment and teaching instruments.
Modified reinforced polypropylene
The production method of modified reinforced polypropylene is the same as that of glass fiber reinforced polypropylene, the difference is that a certain proportion of modifiers and additives with special properties are added in the process of producing glass fiber reinforced polypropylene. Due to the different properties of additives, the modified reinforced polypropylene produced is divided into chemically modified reinforced polypropylene, self-extinguishing reinforced polypropylene and flame retardant reinforced polypropylene. Modified reinforced polypropylene abbreviated code is MRPP
Structural formula:
CCHCH2+glass fiber+additives
(1) Performance characteristics Compared with ordinary reinforced polypropylene, the performance characteristics of modified reinforced polypropylene are as follows.
①Excellent mechanical strength and high modulus, which can be used under large loads.
② Strong adaptability to ambient temperature, the product can be used in the temperature range of -40~150℃.
③Good chemical stability.
④ It has excellent impact toughness.
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