POE plastic is a thermoplastic elastomer that uses metallocene catalysts to achieve in-situ polymerization of ethylene and octene.

POE plastics are divided into two types, one is a polymer of ethylene and butene, and the other is a polymer of ethylene and octene.

The molecular structure of POE plastic is similar to that of EPDM rubber. According to the manufacturing method, it can be divided into two types: mechanical blending type and chemical grafting type. Mechanical blending type can be further divided into direct mechanical blending type and dynamic partial vulcanization blending type, which presents an inhomogeneous two-phase structure.

Introduction

POE is divided into two types, one is a polymer of ethylene and butene, and the other is a polymer of ethylene and octene.

Its characteristics are: (1) The soft chain curling structure of octene and the crystalline ethylene chain as physical cross-linking points make it have both excellent toughness and good processability. (2) There are no unsaturated double bonds in the molecular structure of POE plastic, and it has excellent aging resistance. (3) POE plastic has a narrow molecular weight distribution, good fluidity, and good compatibility with polyolefins. (4) Good fluidity can improve the dispersion effect of fillers and also improve the weld mark strength of products.

With the increase of POE plastic content, the impact strength and elongation at break of the system are greatly improved. It can be seen that POE plastic has an excellent toughening effect on PP and has good compatibility with PP and activated calcium carbonate. This is because the molecular weight distribution of POE plastic is narrow, and the side octyl group in the molecular structure is longer than the side ethyl group, which can form a connection point in the molecular structure, play a role in connecting and buffering between the components, so that the system can disperse and buffer the impact energy when it is impacted, reduce the chance of silver streaks developing into cracks due to force, and thus improve the impact strength of the system. When the system is subjected to tension, the network structure formed by these connection points can undergo a large deformation, so the elongation at break of the system increases significantly. When the content of POE plastic increases, the tensile strength, bending strength and bending modulus of the system all decrease. This is determined by the performance of POE plastic itself, so the content of POE plastic should be controlled below 20%.

The relationship between the content of POE plastic and the melt index. After adding POE plastic, the melt index of the system increases. POE plastic itself has good fluidity. Its addition also improves the fluidity of the entire system. When the content of POE plastic exceeds 15 parts, the melt index of the system basically does not change. If you want to continue to improve the fluidity of the system, you cannot rely entirely on POE plastic.

Application range

It is mainly used to modify and toughen PP, PE and PA in the automotive industry to make bumpers, fenders, steering wheels, pads, etc. Insulation layers and sheaths with high requirements for heat resistance and environmental resistance in the wire and cable industry. It is also used in industrial products such as hoses, conveyor belts, tapes and molded products. Medical equipment, household appliances, stationery, toys, etc., as well as packaging films, especially suitable for low-smoke halogen-free flame retardant materials; hose packaging for cosmetics, food, etc.; foaming midsoles and outsoles for sports shoes; flame retardant masterbatch; stretch film, wrapping film, various types of cling film; and also used in industrial pressed products such as hoses, conveyor belts, tapes and molded products.

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