PHOTOPOLYMERIZATION KINETICS AND PHOTO-RHEOLOGICAL BEHAVIORS OF VINYL-MONOMERS

Hai-yan Peng; Ming-li Ni; Shu-guang Bi; Xiao-lin Xie

doi:10.3724/SP.J.1105.2012.12217

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PHOTOPOLYMERIZATION KINETICS AND PHOTO-RHEOLOGICAL BEHAVIORS OF VINYL-MONOMERS

Feature Articles | 更新时间：2021-03-19

- PHOTOPOLYMERIZATION KINETICS AND PHOTO-RHEOLOGICAL BEHAVIORS OF VINYL-MONOMERS
- Acta Polymerica Sinica Issue 11, Pages: 1218-1224(2012)
- 作者机构：
  
  华中科技大学化学与化工学院,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2012.12217
  CLC：
- Published：20 November 2012，
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Hai-yan Peng, Ming-li Ni, Shu-guang Bi, Xiao-lin Xie. PHOTOPOLYMERIZATION KINETICS AND PHOTO-RHEOLOGICAL BEHAVIORS OF VINYL-MONOMERS. [J]. Acta Polymerica Sinica (11):1218-1224(2012)
DOI：

Hai-yan Peng, Ming-li Ni, Shu-guang Bi, Xiao-lin Xie. PHOTOPOLYMERIZATION KINETICS AND PHOTO-RHEOLOGICAL BEHAVIORS OF VINYL-MONOMERS. [J]. Acta Polymerica Sinica (11):1218-1224(2012) DOI： 10.3724/SP.J.1105.2012.12217.

摘要

概述了光引发体系、光照强度、单体平均官能度、液晶含量、反应温度、助剂等对乙烯基单体/液晶混合物光聚合动力学及光固化流变行为的影响. 在染料和胺组成的二元Ⅱ型(夺氢型)光引发体系中

引入适当的第三组分能显著提高反应速率和转化率;增加光照强度和升高温度也能显著提高反应速率和转化率. 随着单体平均官能度的增加

体系的反应速率和转化率呈现先增加后降低的趋势. 对于Ⅰ型(裂解型)光引发剂

液晶含量增加

单体反应速率降低

但转化率基本不变;但对于Ⅱ型光引发剂

液晶含量增加能大幅提高单体反应速率和转化率. 加入使体系黏度降低的助剂也能提高体系的反应速率和转化率. 在体系相同、温度固定的条件下

反应速率越高

凝胶化时间越短;相同体系

温度升高

凝胶化时间提前;相同温度下

单体官能度愈高

体系凝胶时间亦愈短.

Abstract

The effects of photoinitiators

light intensity

average functionality of mixed monomers

liquid crystal content

temperature and additives on the photopolymerization kinetics and photo-rheological behaviors of vinyl-monomer/liquid crystal mixtures are reviewed.The rate of polymerization Rp and monomer conversion greatly increase when an appropriate third component is added into the binary dye/amine type Ⅱ (H-abstraction type) photoinitiator system

and also largely increase when light intensity or temperature rises.Rp and first ascend and then descend with increasing the average functionality of mixed monomers.With an increase of liquid crystal content

Rp diminishes while there is no evident variation of for the type Ⅰ (cleavage type) photoinitiator; on the contrary

both Rp and significantly increase for the type Ⅱ photoinitiator in that condition.Additives that can lower the viscosity of monomer/liquid crystal mixtures also increase Rp and .Generally

higher Rp causes shorter gelation time for an identical system at a given temperature

and gelation takes place earlier when temperature increases for an identical system or the average functionality of mixed monomers rises at a fixed temperature.

关键词

全息聚合物分散液晶光聚合动力学光固化流变行为相分离凝胶化

Keywords

Holographic polymer dispersed liquid crystalsPhotopolymerization kineticsPhoto-rheologyPhase separationGelation

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