Positron lifetime spectra of superhigh molecularweight polystyrenes

ZHANG Shuihe QI Chenze WANG  Baoyi WANG Tianmin

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Positron lifetime spectra of superhigh molecularweight polystyrenes

更新时间：2021-04-09

- Positron lifetime spectra of superhigh molecularweight polystyrenes
- NUCLEAR TECHNIQUES Issue 4, (1998)
- 作者机构：
  
  兰州大学
- 作者简介：
- 基金信息：
- DOI：
  CLC： O571
- Published：01 April 1998
- 稿件说明：
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[1]张水合,齐陈泽,王宝义,王天民.超高分子量聚苯乙烯中的正电子寿命谱[J].核技术,1998(04):227-229.

ZHANG Shuihe QI Chenze WANG Baoyi WANG Tianmin. Positron lifetime spectra of superhigh molecularweight polystyrenes[J]. Nuclear techniques, 1998, (4).
[1]张水合,齐陈泽,王宝义,王天民.超高分子量聚苯乙烯中的正电子寿命谱[J].核技术,1998(04):227-229. DOI：

ZHANG Shuihe QI Chenze WANG Baoyi WANG Tianmin. Positron lifetime spectra of superhigh molecularweight polystyrenes[J]. Nuclear techniques, 1998, (4). DOI：

摘要

以２，３－二氰基－２，３－二（ｐ－Ｘ取代苯基）丁二酸二乙酯（Ｘ＝Ｈ，ＣＨ＿３，Ｃｌ）为引发剂，用本体法合成了超高分子量聚苯乙烯。研究了不同引发剂对苯乙烯聚合物正电子湮没寿命谱的影响，通过比较聚合物的分子量和自由体积，表明引发剂的分解速率对自由体积有较大的影响，而浓度对自由体积的影响不大。

Abstract

The high molecular weight polystyrenes are synthesized by use of diethyl 2

3-dicyano-2

3 di（p-X substituted phenyl） succinate （X=H

CH3

C1） initiators. The influence of different initiators on the positron annihilation spectra are studied by comparing polystyrectes’ molecular weight and free volume. The results indicate that the decomposition rate of initiator has effect on free volume

but initiator’s density has no great effect on free volume.

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