Star-shaped comb type butadiene/phenylethylene block copolymers and preparation method thereof

A technology of styrene copolymer and styrene block, which is applied to the field of a kind of star-shaped comb-shaped butadiene/styrene block copolymer and its preparation, and can solve the problem that the star-shaped comb-shaped butadiene cannot be obtained. /Styrene block copolymer etc.

Active Publication Date: 2009-06-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents US4086298 and US4167545 disclose that BASF in Germany is SiCl 4 The method for preparing star-shaped styrene-butadiene transparent impact resin as a coupling agent, patents ZL03146385.1 and ZL03146384.3 disclose that China Petroleum Research Institute uses methyltrimethoxysilane as a coupling agent to prepare star-shaped styrene-butadiene transparent anti-impact resin. The method for flushing resin, adopting above-mentioned coupling agent can only prepare star-shaped butadiene / styrene block copolymer, and can not obtain the prepared star-shaped comb-shaped butadiene / styrene block copolymer of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of epoxidized liquid star polybutadiene: n-butyl lithium as initiator, cyclohexane as solvent, tetrahydrofuran as activator (THF / Li is 0.6), silicon tetrachloride as coupling The liquid star-shaped polybutadiene is prepared by a classic anionic polymerization method. The number-average molecular weight of the polybutadiene before coupling is 1000, and the coupling efficiency is 100% through GPC analysis. The microstructure analysis results of the liquid star polybutadiene are as follows: the trans 1,4-structure content is 38%, the cis 1,4-structure content is 47%, and the 1,2-structure content is 15%. Add 1.5 L of toluene solution with 150 g of liquid star polybutadiene dissolved in a 2 L reactor, turn on the stirring, add 1.07 mol of 88% formic acid at 50°C, and drop 1.07 mol of 30% H in 10 minutes. 2 o 2 , and then react for 2hr. After the reaction, wash with distilled water until neutral, then distill off most of the toluene, and then use a cold trap to...

Embodiment 2—8

[0036] Preparation of star-shaped comb-shaped butadiene / styrene block copolymer: use n-butyllithium as the initiator (the amount of the initiator is calculated according to the molecular weight of the A block copolymer before coupling), and cyclohexane as the solvent (solvent consumption is calculated and determined with polymer glue concentration 15%, mass fraction), is activator (THF / Li is 0.6, molar ratio) with tetrahydrofuran, with the epoxidized liquid star polybutylene prepared in Example 1 Diene is used as a coupling agent, and star-shaped comb-shaped polybutadiene is prepared by a classic anionic polymerization method. The butadiene / styrene monomer ratio of Examples 2-8, the number average molecular weight, block composition, and coupling agent consumption of butadiene / styrene block copolymer A before coupling are shown in Table 1. Star comb As shown by the molecular structure parameters of the butadiene / styrene block copolymer, other preparation conditions are the sam...

Embodiment 9

[0038] Preparation of epoxidized liquid star polybutadiene: the structure and preparation method are the same as in Example 1, except that the number average molecular weight of polybutadiene before coupling is 1500, and the epoxidized liquid star polybutadiene The epoxy value is 0.65.

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Abstract

The invention belongs to the technical field of polymer material synthesis and preparation, relating to a star-shaped comb butadiene/styrene segmented copolymer, which is characterized in that the copolymer has the following structure: An-C, wherein A is the butadiene/styrene segmented copolymer, C is star-shaped seed tree coupler residue which is an epoxidation liquid star-shaped copolymer, n is branching degree which is larger or equal to 3, the number average molecular weight of the star-shaped comb segmented copolymer An-C is 5*10<4>-50*10<4>, the number average molecular weight of the segmented copolymer A is 1*10<4>-15*10<4>, the content of styrene is 55 percent to 85 percent (weight percent, same below), the content of butadiene is 15 percent to 45 percent, the content of 1, 2-structure is less than 30 percent (weight percent, which is counted by 100 percent of the total amount of monomer butadiene). The synthesis has the effect and benefit of simplifying the synthetic route of the star-shaped comb butadiene/styrene segmented copolymer, which can be widely applied to the preparation of the star-shaped comb butadiene/styrene segmented copolymer.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis and preparation, relates to the field of synthetic rubber and resin, in particular to a class of star-shaped comb-shaped butadiene / styrene block copolymers and a preparation method thereof. The block copolymer has the following structure: An—C, wherein: A is a butadiene / styrene block copolymer, C is a multifunctional coupling agent residue, n is a branching degree, and n is greater than or equal to 3. Background technique [0002] The present invention is based on Star-Seed Tree technology, starting from liquid star-shaped polybutadiene, and preparing star-shaped Seed tree, ie: epoxidized liquid star polybutadiene. Star-shaped comb-shaped butadiene / styrene block copolymer was prepared by using epoxidized liquid star-shaped polybutadiene as coupling agent. [0003] Butadiene / styrene transparent impact resin is a kind of styrene / butadiene / butadiene with high styrene content (usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04C08F8/00C08C19/44C08G81/02
Inventor 李杨李战胜张红霞张春庆陈闯赵忠夫宋顺玺王玉荣
Owner DALIAN UNIV OF TECH
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