STUDIES ON S/B MULTI-BLOCK COPOLYMER POLYMERIZED BY REACTIVE EXTRUSION

ZHANG Ying; YAN Wei; GAO Shishuang; ZHENG Anna; HAN Zhewen

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STUDIES ON S/B MULTI-BLOCK COPOLYMER POLYMERIZED BY REACTIVE EXTRUSION

Research Article | 更新时间：2021-03-19

- STUDIES ON S/B MULTI-BLOCK COPOLYMER POLYMERIZED BY REACTIVE EXTRUSION
- Acta Polymerica Sinica Issue 5, Pages: 677-682(2002)
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- Published：20 October 2002，
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ZHANG Ying, YAN Wei, GAO Shishuang, ZHENG Anna, HAN Zhewen. STUDIES ON S/B MULTI-BLOCK COPOLYMER POLYMERIZED BY REACTIVE EXTRUSION. [J]. Acta Polymerica Sinica (5):677-682(2002)
DOI：

ZHANG Ying, YAN Wei, GAO Shishuang, ZHENG Anna, HAN Zhewen. STUDIES ON S/B MULTI-BLOCK COPOLYMER POLYMERIZED BY REACTIVE EXTRUSION. [J]. Acta Polymerica Sinica (5):677-682(2002) DOI：

摘要

在阴离了引发体系下

以双螺杆挤出机为反应器

采有丁二烯、苯乙烯混和单体加料方式

本体法一步合成了S/B多嵌段共聚物

考察了螺杆转速、进料速率以及不同丁苯配比对反应挤出合成PS及S/B嵌段共聚物聚合转化率的影响

用1H-NMR、IR、DMA、TEM等方法对S/B嵌段共聚物进行了表征

结果表明共聚物由多个微小的丁二烯嵌段和少量无规段组成

当丁二烯含量少至15%左右时

其嵌段可回缩成球状

粒径大约在30～50nm

该材料的韧性随着共聚物中丁二烯含量的增加而逐渐提高

特别是断裂延伸率的提高尤为显著。

Abstract

A kind of styrene-butadiene (S／B) multi-block copolymer was bulk-polymerized in a twin-screw extruder with the anion initiators and mixed S／B monomers．The effects of screw rotational speed

feed rate of monomers and St content on the conversion of styrene and S／B mixture were researched．S／B block copolymer was characterized by 1H-NMR

DMA．It is shown that a lot of short polybutadiene blocks and a little random structure coexist in the copolymer．It also can be seen in TEM photographs that the polybutadiene blocks

while being less than 15％ in whole composition

can retract into the ball shape 30～50 nm in diameter．On lhe other hand

the toughness

especially the elongation at break

of the copolymer grows stronger with the increase of butadiene content．

关键词

苯乙烯丁二烯反挤出多嵌段共聚物

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