What is polypropylene, what is its classification, model and nomenclature method

Polypropylene is one of the important thermoplastic varieties in polyolefin plastics. It is a high-molecular-weight polymer of propylene, composed of two elements: South C and H. The structural formula of polypropylene is seven ch—ch:

A chch: Lost. Polypropylene is abbreviated as PP.

11 CH3CH3 polypropylene and propylene copolymer material nomenclature and model are in accordance with the national standard GB T2546-88. The naming model is composed of the abbreviation code of polypropylene, the type of polymer, the main use and other indexes, the melt flow speed and other characteristics of the material: the specific naming form is as follows.

Unit 1: Polypropylene resin code and polymer type, PP is polypropylene, H is propylene homopolymer, B is propylene block copolymer, and R is propylene random copolymer. Q stands for Variety.

Polypropylene is a high molecular weight polymer of propylene, which is composed of two elements, C and H. According to the spatial arrangement of one ch3 group in the polypropylene molecule, it can be divided into isometric polypropylene, interdimensional polypropylene and random polypropylene. Currently, almost all of the plastics used are isometric polypropylene.

The abbreviated code name is PP. There are many types of ole resins, and the most widely used are flat wire grade polypropylene, film grade polypropylene, cast grade polypropylene, biaxially oriented (BOPP special) polypropylene, injection molding grade polypropylene and ethylene propylene copolymer polypropylene.

Polypropylene, English name: polypropylene (PP), Japanese name: molecular formula:

C3H6) Accession No.: 9003-07-0, is a thermoplastic resin prepared by propylene polymerization. According to the methyl arrangement, it can be divided into three types: isotaetic polypropylene, atactic polypropylene and syndiotatic polypropylene.

The simple structure of polypropylene is ch3-ch=ch2.

The monomer of polypropylene is propylene leakage, the structure is simplified: CH3-CH=CH2, propylene undergoes a polyaddition reaction, the double bond is broken, and it is connected to form a polymer compound. Polypropylene is a colorless, odorless, non-toxic white waxy granular material, similar in appearance to polyethylene, but more transparent and lighter than polyethylene, with a relative density, and is the lightest plastic variety.

Applications of polypropylene

Polypropylene has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, which makes polypropylene rapidly used in machinery, automobile tung training, electronic appliances, construction, textile, packaging, agriculture, forestry and fishery and food industry since its inception.

In recent years, with the rapid development of China's packaging, electronics, automobile and other industries, it has greatly promoted the development of China's industry. And because of its plasticity, polypropylene material is gradually replacing wooden products, and high strength toughness and high rot and wear resistance have gradually replaced the mechanical function of metal.

The above content reference: Encyclopedia - polypropylene.

Polypropylene is a thermoplastic resin made from the polymerization of propylene.

Polypropylene has high impact resistance, strong mechanical properties, and resistance to a variety of organic solvents and acid and alkali corrosion. There are a wide range of applications in industry, including packaging materials and labels, textiles (e.g., ropes, thermal underwear and carpets), stationery, plastic parts and various types of reusable containers;

Thermoplastic polymer equipment, loudspeakers, automotive parts, and polymer paper used in laboratories are one of the common polymer materials. In 2013, the global market for polypropylene was about 55 million tons. Plastic coins from the United Kingdom, Australia, and Canada are also made using polypropylene.

The structure of polypropylene is similar to that of polyethylene, so many properties are similar to polyethylene, especially in the reaction and electrical properties in solution. Due to the presence of a methyl side chain, the mechanical properties and heat resistance of the sliding search can be improved, but polypropylene is more easily oxidized and degraded under the action of ultraviolet light and heat, and has high heat resistance and chemical stability.

In essence, it is close to high-density polyethylene, and the crystallinity is slightly lower than that of high-density polyethylene, so it is generally translucent, and the hardness is not much different from that of high-density polyethylene. The properties of polypropylene depend on the molecular weight and molecular weight distribution, crystallinity, type and the proportion and isogauge of comonomers (if used).

PE: Polyethylene.

It is one of the most commonly used polymer materials in daily life, and is widely used in the manufacture of plastic bags, plastic films, milk barrels.

Polyethylene is resistant to many organic solvents and acids and alkalis, but not oxidizing acids such as nitric acid. In an oxidizing environment, polyethylene is oxidized.

Polyethylene is considered transparent in the film state, but when it is in the form of a block, it will be opaque due to the presence of a large number of crystals inside, and strong light scattering will occur. The degree of polyethylene crystallization is affected by the number of branches, and the more branches, the more difficult it is to crystallize. The crystal melting temperature of polyethylene is also affected by the number of branches, ranging from 90 degrees Celsius to 130 degrees Celsius.

Polyethylene monocrystals can usually be prepared by dissolving high-density polyethylene in xylene at temperatures above 130 degrees Celsius. It is used for crates, crates, pallets, etc.

Structural formula: - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2

PP: Polypropylene.

It is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to a variety of organic solvents and acid and alkali corrosion. It has a wide range of applications in the industrial world, and round rot is one of the common polymer materials. Australian coins are also made of polypropylene.

PPE polypropylene.

Chemical and physical properties.

Often, commercially available PPE or PPO materials are mixed with other thermoplastic materials such as PS, PA, etc. These are mixed materials.

It is still commonly referred to as PPE or PPO

Hybrid PPE or PPO has much better processing characteristics than pure materials. The change in characteristics depends on the mixture such as PPO and PS.

Ratio. Blends with PA 66 are chemically more stable at high temperatures. The hygroscopicity of this material is very small, its.

The product has excellent geometric stability.

Materials mixed with PS are amorphous, whereas materials mixed with PA are crystalline. The addition of glass fiber additives can make:

The shrinkage is reduced to the fact that the material also has excellent electrical insulating properties and a very low coefficient of thermal expansion. Its stickiness depends.

An increase in the ratio of mixtures in the material and the ratio of PPO will lead to an increase in viscosity.

Injection molding process conditions.

Drying treatment: It is recommended to dry for 2 4 hours at 100C before processing.

Melting temperature: 240 320C

Mold temperature: 60 105C

Injection pressure: 600 1500 bar

Runners and gates: CH3

What are the specific classifications of polypropylene plastics? Polypropylene is a thermoplastic resin made from the polymerization of propylene. According to the methyl arrangement, it can be divided into three types: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene.

The methyl group is arranged on the same side of the molecular backbone called isometric polypropylene, if the methyl group is arranged in an orderly manner on both sides of the molecular backbone, it is called random polypropylene, and when the methyl group is alternately arranged on both sides of the molecular backbone, it is called interconventional polypropylene. In the polypropylene resin produced in general industry, the isometric structure content is about 95%, and the rest is random or inter-regular polypropylene. Industrial products are mainly composed of isometric substances.

Polypropylene also includes copolymers of propylene with a small amount of ethylene. It is usually a translucent colorless solid, odorless and non-toxic. Due to the regular structure and high crystallization, the melting point can be as high as 167.

Heat-resistant, corrosion-resistant, products can be sterilized by steam is its outstanding advantages. With its low density, it is the lightest general-purpose plastic. The disadvantage is that the low temperature impact resistance is poor and it is easy to age, but it can be overcome by modification.

The copolymer type PP material has a lower heat deflection temperature (100 °), low transparency, low gloss and low rigidity, but has stronger impact strength, and the impact strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150. Due to its high crystallinity, the material has good surface stiffness and scratch resistance.

PP does not have the problem of environmental stress cracking.

The melt mass flow rate (MFR) of PP is typically 1 100. PP materials with low MFR have better impact resistance but lower elongation strength. For materials with the same MFR, the impact strength of the copolymer type is higher than that of the homopolymer type.

Due to crystallization, the shrinkage of PP is quite high, generally.

Polypropylene is a thermoplastic, the answer upstairs is very comprehensive, I am adding a few words in detail, IPP (homopolymer polypropylene) strength is better, the production of some plastic parts, and PPR (random polypropylene) in view of its toughness is better, more pipes.

Polyethylene (PE) is a kind of thermoplastic BAI made of ethylene by polymerization

Sexual resin. In the industrial industry, it also includes copolymers of ethylene and a small amount of -olefins.

DAO polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can resist the erosion of most acids and alkalis. It is insoluble in general solvents at room temperature, has low water absorption and excellent electrical insulation. The mechanical properties of polyethylene are average, the tensile strength is low, the creep resistance is not good, and the impact resistance is good.

Polyethylene can be processed by blow molding, extrusion, injection molding and other methods, and is widely used in the manufacture of films, hollow products, fibers and daily miscellaneous products.

Types of polyethylene.

1) LDPE: Low Density Polyethylene, High Pressure Polyethylene (2) LLDPE: Linear Low Density Polyethylene.

3) MDPE: medium density polyethylene, bimodal resin.

4) HDPE: High Density Polyethylene, Low Pressure Polyethylene (5) UHMWPE: Ultra High Molecular Weight Polyethylene.

6) Modified polyethylene: CPE, cross-linked polyethylene (PEX) (7) Ethylene copolymer: ethylene-propylene copolymer (plastic), EVA, ethylene-butylene copolymer, ethylene-other olefins (such as octene POE, cyclic olefin copolymer, ethylene-unsaturated ester copolymer (EAA, EMAA, EEA, EMA, EMMA, EMAH).

There are many biaxially oriented polypropylene films, which can also be used for modified polypropylene for automobiles; polypropylene for household appliances; Polypropylene for pipes and other industries.

Chlorinated polypropylene is mainly used.

1) Chlorinated polypropylene is the main raw material in the production of composite ink for B0PP book film.

2) Chlorinated polypropylene can be used as an adhesive for BOPP film and paper, and can also be used as the main raw material for the production of other adhesives.

3) Chlorinated polypropylene has good gelatinization and gloss, and is used as a decomposition coating for polypropylene injection molding (4) Because chlorine atoms are on the molecular chain of chlorinated polypropylene, it is also partially used in flame retardants.

PP polypropylene Usage: Origin: Shandong Qilu Petrochemical.

The main model of polypropylene (blown film) is: PP

The main model of polypropylene (brushed) is: PP

The main type of polypropylene (injection molded) is PP

The main model of polypropylene (blown film) is: RF400 Samsung Total.

The main model of polypropylene (brushed) is: T30S Sinopec.

The main models of polypropylene (injection molding) are: injection molding PP is more common, most of the PP is, I give you these models are just a random model, and there are many suitable for you!