Preparation method of widely-distributed hyperbranched polyethylene

Abstract

The invention discloses a preparation method of widely-distributed hyperbranched polyethylene and belongs to the field of material chemistry. The method comprises the steps of adding an auxiliary agent in the olefin polymerization process; and jointly adopting the auxiliary agent, a catalyst and a cocatalyst to polymerize ethylene. The molecular weight distribution of the hyperbranched polyethylene can be controlled by using the method disclosed by the invention; meanwhile the decreasing degree of the weight average molecular weight of the polymer is controlled; the obtained copolymer has a broad molecular weight distribution, thereby being beneficial to the performance of the product.

Description

technical field [0001] The present invention relates to a kind of preparation method of wide-distribution hyperbranched polyethylene, be specifically related to a kind of auxiliary agent and catalyst, co-catalyst co-use, the method that makes ethylene take place polymerization reaction, belongs to the field of material chemistry. Background technique [0002] With the continuous progress of society and the rapid development of science and technology, the demand for high-performance materials is also increasing. Hyperbranched polyethylene has branches on the carbon chain, low viscosity in solution and molten state, good mechanical properties, melt extensibility, transparency and good processing performance, and has become a major variety of polyolefin products. Compared with linear polyethylene, hyperbranched polyethylene has superior processing performance, better film formation and light transmittance of film, etc. Moreover, when the degree of branching increases, the glas...

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Problems solved by technology

[0005] However, the ability of the above catalysts to regulate the molecular weight distribution i

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