Preparation method of functional telechelic polymer with controllable double-bond content of main chain

Abstract

The invention relates to a preparation method of a functional telechelic polymer with controllable double-bond content of a main chain, and particularly relates to a preparation method of a telechelic polymer with terminal hydroxyl. The preparation method is characterized in that double bonds on a molecule main chain of hydroxyl-terminated polybutadiene are hydrogenated by using trisrhodium chloride, and then through condition control, a telechelic polymer with controllable double-bond content of the main chain is obtained; the hydroxyl-terminated polybutadiene is dissolved in dimethylbenzene in a proportion of 12.5-50%, and then reaction is carried out for 2-10 h under the conditions that the pressure is 0.5-3.0 MPa and the temperature is 70-150 DEG C, wherein the application amount of a catalyst is 0.5-1.5%, and the application amount of triphenylphosphine is 1-4 times as large as that of the catalyst. The preparation method disclosed by the invention has the advantages that a controllable double-bond containing functional telechelic polymer is prepared by using a hydrogenation and modification method, and the method has a main advantage that the double-bond content of a molecule chain of the functional telechelic polymer can be controlled as required through changing experiment conditions.

Description

technical field [0001] The invention relates to a preparation method of a functional telechelic polymer with controllable double bond content in the main chain, in particular to a telechelic polymer containing terminal hydroxyl groups with controllable double bond content in the main chain. Background technique [0002] Telechelic polymer is a liquid polymer with reactive functional groups at both ends of the molecule, which can be used as liquid rubber, coatings, adhesives, sealants, etc., and finally through the interaction of active end groups, chain extension or crosslinking into high molecular weight polymers. Common preparation methods for telechelic polymers include free radical polymerization and anionic polymerization. [0003] Yu Wanneng and others studied a kind of dilithium catalyst with non-polar hydrocarbon as solvent and α-methylnaphthalene lithium complex as the initiator to make butadiene or butadiene / styrene in cyclohexane Two kinds of ionic telechelic po...

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Problems solved by technology

[0011] Due to the large double bond content in the hydroxyl-terminated polybutadiene molecular chain, its heat resistance and weather resistance are insufficient, and the double bond content in its molecular chain also directly affects the performance of the composite material made from it, so How to prepare a polymer with a controllable main chain double bond content also has a very broad prospect. There is no report on the preparation of a telechelic polymer with a controllable main chain double bond content with terminal hydroxyl groups.

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