High Molecular Weight Polymer Nucleating Agent Modified Ultra High Molecular Weight Polyethylene Blends

Abstract

The invention relates to a high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material. The blend material comprises the following raw materials by weight: 60 to 100 parts of UHMWPE, 5 to 12 parts of HDPE, 6 to 16 parts of LLDPE, 0.1 to 3 parts of a high-molecular-weight polymer nucleating agent and 1.5 to 3 parts of a flow modifier. The high-molecular-weight polymer nucleating agent has the advantages of no odor, good dispersibility, good compatibility, capacity of realizing heterogeneous crystallization, a high degree of crystallization and a small application amount; the high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material retains original characteristics of polyethylene UHMWPE and has obviously improved tensile strength, impact strength, bending strength, Vicat softening temperature, elongation at break and Shore hardness and a reduced mortar wear rate.

Description

technical field [0001] The invention belongs to the technical field of polymer processing, and relates to an ultrahigh molecular weight polyethylene blend modified material, in particular to a high molecular weight polymer nucleating agent modified ultrahigh molecular weight polyethylene blend material. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) has a viscosity average molecular weight greater than 1.5 million. It is a new type of thermoplastic engineering plastic. Its extremely high molecular weight and highly entangled segment structure endow it with excellent impact resistance, wear resistance, self-lubrication, and Chemical corrosion and excellent low-temperature performance and other mechanical properties, but due to the long molecular chain of UHMWPE, chain entanglement is very easy to occur, and the viscosity in the molten state is very high, as high as 108 Pa s -1 , The fluidity is extremely poor, the flow rate is almost zero, and...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the disadvantages of poor dispersion and compatibility of low molecular weight inorganic and organic nucleating agents, the object of the present invention is to provide a high molecular weight polymer nucleating agent modified ultra-high molecular weight polyethylene blend material, ultra-high molecular weight polyethylene UHMWPE retains the original characteristics, and the plasticizing effect of the composition is good, the processing fluidity is increased, the temperature resistance, rigidity, impact performance, etc. are all improved, and can be widely used in products produced by extrusion and injection molding.

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