Chinese Academy of Sciences

Ruigang Liu

Jian Xu

Qian Li

Ning Zhao

Huayi Li

Tongbing Sun

Caizhen Zhu

An ultra-high molecular weight, ultra-fine particle size polyethylene has a viscosity average molecular weight (Mv) greater than 1&#xd7;10. The polyethylene is spherical or are sphere-like particles having a mean particle size of 10-100 &#x3bc;m, having a standard deviation of 2-15 &#x3bc;m and a bulk density of 0.1-0.3 g/mL. Using the polyethylene as a basic polyethylene, a grafted polyethylene can be obtained by means of a solid-phase grafting method; and a glass fiber-reinforced polyethylene composition comprising the polyethylene and glass fibers, and a sheet or pipe prepared therefrom; a solubilized ultra-high molecular weight, ultra-fine particle size polyethylene; and a fiber and a film prepared from the solubilized ultra-high molecular weight, ultra-fine particle size polyethylene may also be obtained. The method has simple steps, is easy to control, has a relatively low cost and a high repeatability, and can realize industrialisation.

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Beijing, China

Ruigang Liu