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Initiation system for polymerization of star-branched polyisobutene or isobutene-diene rubber positive ion

A technology of cationic polymerization and polyisobutylene, which is applied to the initiation system of active cationic polymerization of star-branched polyisobutylene or butyl rubber, and the field of block copolymers containing functional groups, which can solve the lack of widely applicable initiation systems, etc. question

Inactive Publication Date: 2009-01-28
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0008] At present, when different monomers are polymerized, different initiation systems are generally used, and there is a lack of widely applicable initiation systems.

Method used

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  • Initiation system for polymerization of star-branched polyisobutene or isobutene-diene rubber positive ion
  • Initiation system for polymerization of star-branched polyisobutene or isobutene-diene rubber positive ion

Examples

Experimental program
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Embodiment 1

[0029] Example 1: Synthesis of polystyrene / isoprene block copolymers containing silicon chloride groups at the end

[0030] In 40ml cyclohexane, add 1ml THF, 2.75ml isoprene, add 0.289mol / L n-butyllithium 1ml after killing impurities, polymerize at 40°C for 1h, add 8.2ml styrene to polymerize for 2h, the active species Slowly add 20ml of cyclohexane solution containing 3ml of dimethylchlorosilane to stop. Precipitate by n-pentane, wash, and dry the product in vacuo. The polymer was detected by NMR, and the polyisoprene in the block copolymer accounted for 12% (mass), and the structure ratio of 3,4:1,2:1,4 was 63:16:21. The number average molecular weight detected by GPC is 5.45×104, from the GPC spectrogram ( figure 1 ) found that only a small amount of dimethylchlorosilane was involved in the coupling.

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Abstract

The invention relates to an initiation system for preparing a star branching polyisobutylene or the polymerization of a butyl rubber cation. The invention is used for a macromolecule compound obtained by the cation polymerization reaction of carbon-carbon unsaturated bond. The novel initiation system consists of an initiation-grafting agent; a co-initiation agent and a nucleophile and is used for initiating an ethylene monomer to carry out homopolymerization, segment copolymerization, star polymerization and grafting copolymerization. The material used by the initiation system is a common chemical reagent which is cheap. The gel chromatography spectrogram of the obtained polymer is distributed in an obvious double-peak way. The performance of the products is excellent. The initiation system provides a beneficial condition to the industrialization of the cation polymerization technique for the activity of various olefin compounds.

Description

technical field [0001] The present invention relates to a kind of new initiating system, it is used in the macromolecular compound that carbon-carbon unsaturated bond living cationic polymerization reaction obtains, more specifically, the present invention relates to a kind of block copolymer containing functional group, co-initiating Active positive ion polymerization star branched polyisobutylene or butyl rubber initiation system composed of reagents and nucleophiles. Background technique [0002] For living cationic polymerization, due to the high activity of carbocations, the polymerization reaction is prone to various side reactions, making the realization of living cationic polymerization very difficult. In recent years, the research on its initiating system has achieved different systems. Living Cationic Polymerization. [0003] So far, the living cationic polymerization systems discovered and reported mainly include: [0004] Organic peroxide / Lewis acid as initiati...

Claims

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Application Information

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IPC IPC(8): C08F10/10C08F4/16
Inventor 李树新伍一波郭文莉龚惠勤金玉顺商育伟吕占霞赵锦波
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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