THE FEATURES OF VINYL CHLORIDE/DIALLYL PHTHALATE SUSPENSION COPOLYMERIZATION

BAO Yongzhong; HUANG Zhiming; WENG Zhixue; PAN Zuren

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THE FEATURES OF VINYL CHLORIDE/DIALLYL PHTHALATE SUSPENSION COPOLYMERIZATION

Research Article | 更新时间：2021-03-19

- THE FEATURES OF VINYL CHLORIDE/DIALLYL PHTHALATE SUSPENSION COPOLYMERIZATION
- Acta Polymerica Sinica Issue 4, Pages: 422-426(1997)
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- Published：20 August 1997，
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BAO Yongzhong, HUANG Zhiming, WENG Zhixue, PAN Zuren. THE FEATURES OF VINYL CHLORIDE/DIALLYL PHTHALATE SUSPENSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (4):422-426(1997)
DOI：

BAO Yongzhong, HUANG Zhiming, WENG Zhixue, PAN Zuren. THE FEATURES OF VINYL CHLORIDE/DIALLYL PHTHALATE SUSPENSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (4):422-426(1997) DOI：

摘要

对４５℃时的氯乙烯／邻苯二甲酸二烯丙基酯（ＶＣ／ＤＡＰ）的悬浮共聚进行了研究

得到表观竞聚率ｒＶＣ＝０.７６９、ｒＤＡＰ＝０.３７４．凝胶点对应的ＤＡＰ临界起始浓度在０.４６６～０.４９３ｍｍｏｌ／ｍｏｌＶＣ之间（聚合转化率为８０～８５％）

当ＤＡＰ起始浓度小于临界浓度时

ＶＣ／ＤＡＰ共聚物均为溶胶

溶胶平均聚合度随ＤＡＰ起始浓度和聚合转化率的提高而增大；当ＤＡＰ起始浓度大于临界浓度时

共聚物由溶胶和凝胶组成

凝胶含量随ＤＡＰ浓度和聚合转化率的提高而增加

溶胶聚合度则随ＤＡＰ浓度的提高而减小．在凝胶点前

共聚物的分子量分布随ＤＡＰ浓度的增加而变宽；凝胶点以后

分子量分布随ＤＡＰ浓度的增加而变窄．

Abstract

Vinyl chloride/diallyl phthalate(VC/DAP) suspension copolymerizations were carried out in a 5L autoclave and 200ml stainless steel reactors at temperature of 45℃.The apparent reactivity ratios of VC and DAP were calculated as rVC =0.769

rDAP =0.374.The existence of the gel point of the VC/DAP copolymerization system was ascertained and the critical initial concentration of DAP ( fcr ) at which gel began to form was in range of 0 .466～0. 493mmol/mol VC.The degree of polymerization(DP) and indexs of distribution of molecular weight (MWD)of copolymer increased as the initial concentration of DAP (f20) increased when f20 was less than fcr

and DP also increased with increase of conversion.When f20 was larger than fcr

DP and indexs of MWDof sol fraction decreased as f20 increased

but the gel content increased

the gel content also increased as conbersion increased.

关键词

氯乙烯邻苯二甲酸二烯丙基酯悬浮共聚凝胶溶胶

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