Method for preparing polynorborene by alkene polymerization catalytic

Abstract

This invention relates to a method of alkenes through polymerizization and catalyzing to prepare poly- norbornylene. This method use [ O, N] type double teeth ligand and two valence post- transition metal coordinative complex as catalyst system A component, to carry out addition polymerization of norbornylene. polymerization reaction carry out at anhydrous and oxygenfree condition, add chlorobenzene or toluene solution of A component to reaction vessel at nitrogen or argon atmosphere, whip, and add chlorobenzene solution of norbornylene and cretain volume chlorobenzene, takes polymerization reaction for certain time; Then add B component aluminium trimethide oxygen alkane or toluene solution of modifyed aluminium trimethide oxygen alkane, trigger off polymerization reaction, then use methanol or ethanol solution acidulated by hydrochloric acid to stop reaction; polymer deposit out by solid form, filter, washing by water and methanol or ethanol, vacuum drying, then gain required poly- norbornylene product.This invention can obtain polymer of high molecular weight, high vitrification point and favorable solubility.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing polynorbornene by catalyzing olefin polymerization. Background technique [0002] After half a century of development, the polyolefin industry has become the pillar industry of the modern polymer material industry, and polyolefin products have greatly promoted the development of human civilization. Throughout the history of the development of the polyolefin industry, every upgrade of polyolefin products is completed when a new olefin polymerization catalyst is discovered, which means that the catalyst is the core and driving force for the continuous development of the polyolefin industry. Since the advent of olefin polymerization catalysts in 1953, the development of olefin polymerization catalysts has experienced three eras in the past fifty years: Ziegler-Natta catalyst system, metallocene catalyst system and late transition metal ca...

AI Technical Summary

Problems solved by technology

However, little research has been done on the cationic or free radical polymerization of norbornene, which mainly produces low molecular weight oligomers connected at the 2 and 7 positions

In 1963, Sartori et al. first carried out the research on the addition polymerization of norbornene catalyzed by the catalytic system of metal titanium, but the catalytic activity was not high, and the molecular weight of the obtained polymer was low.

In the late 1980s and early 1990s, Kaminsky et al. found that the addition polymerization of norbornene could be catalyzed by the metallocene / methylaluminoxane catalytic system. The resulting polymer had good thermal stability, but the polymer was insoluble and difficult to process.

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