Cu0/2,2'-联吡啶/CCl4和CuCl2/2,2'-联吡啶/偶氮二异丁腈催化引发体系中的苯乙烯“活性”自由基乳液聚合研究

万小龙; 应圣康

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Cu0/2,2'-联吡啶/CCl4和CuCl2/2,2'-联吡啶/偶氮二异丁腈催化引发体系中的苯乙烯“活性”自由基乳液聚合研究

研究论文 | 更新时间：2021-03-19

- Cu0/2,2'-联吡啶/CCl4和CuCl2/2,2'-联吡啶/偶氮二异丁腈催化引发体系中的苯乙烯“活性”自由基乳液聚合研究
- STUDY ON THE “LIVING/CONTROLLED” RADICAL EMULSION POLYMERIZATION OF STYRENE WITH Cu0/Bpy/CCl4 AND CuCl2/Bpy/AIBN SYSTEMS
- 高分子学报 2000年第1期页码：27-31
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- 纸质出版日期：2000-2-20，
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万小龙, 应圣康. Cu0/2,2'-联吡啶/CCl4和CuCl2/2,2'-联吡啶/偶氮二异丁腈催化引发体系中的苯乙烯“活性”自由基乳液聚合研究[J]. 高分子学报, 2000,(1):27-31.

WAN Xiaolong, YING Shengkang. STUDY ON THE “LIVING/CONTROLLED” RADICAL EMULSION POLYMERIZATION OF STYRENE WITH Cu0/Bpy/CCl4 AND CuCl2/Bpy/AIBN SYSTEMS[J]. Acta Polymerica Sinica, 2000,(1):27-31.
万小龙, 应圣康. Cu0/2,2'-联吡啶/CCl4和CuCl2/2,2'-联吡啶/偶氮二异丁腈催化引发体系中的苯乙烯“活性”自由基乳液聚合研究[J]. 高分子学报, 2000,(1):27-31. DOI：

WAN Xiaolong, YING Shengkang. STUDY ON THE “LIVING/CONTROLLED” RADICAL EMULSION POLYMERIZATION OF STYRENE WITH Cu0/Bpy/CCl4 AND CuCl2/Bpy/AIBN SYSTEMS[J]. Acta Polymerica Sinica, 2000,(1):27-31. DOI：

摘要

分别以Ｃｕ０／２

２′联吡啶（Ｂｐｙ）和ＣｕＣｌ２／Ｂｐｙ配合物为催化剂

ＣＣｌ４和偶氮二异丁腈（ＡＩＢＮ）为引发剂

较为详细地研究了苯乙烯的原子转移自由基乳液聚合规律．结果表明：其乳液聚合体系均显示出了“活性”聚合的基本特征

即数均分子量与转化率呈线性关系

但聚合反应一经引发

聚合物的分子量就达数万

且分子量约为理论值的５至２０倍；Ｃｕ０／Ｂｐｙ／ＣＣｌ４体系的ＭＷＤ与本体聚合相当

而ＣｕＣｌ２／Ｂｐｙ／ＡＩＢＮ体系的ＭＷＤ比其本体聚合体系大

最小为１.６４；研究Ｃｕ０／Ｂｐｙ／ＣＣｌ４体系发现

乳液聚合与悬浮聚合在“活性”特征上没有本质的区别

但两者在动力学上有些差异；跟踪乳液聚合过程中的ｐＨ值发现

体系中的ｐＨ值随反应时间的延长呈下降趋势

并可能影响聚合速率．

Abstract

The emulsion polymerization of styrene by Cu0/2

2′-bipyridine (Bpy)/CCl4 and CuCl2/Bpy/azobisisobutyronitrile (AIBN) catalyst/initiator system was studied

respectively.The results show that the molecular mass increased in linear with the conversion of monomer

which hints the emulsion polymerization may be a “living/controlled” system

and the incipient molecular mass

which are as 5 to 20 times as the theory one

may be up to 10

000s once the polymerization was initiated.The polymer MWD from Cu0/Bpy/CCl4 emulsion system accords with that from ist bulk polymerixation.Moreover

the MWD from CuCl2/Bpy/AIBN emulsion system is broader than that from ist bulk polymerization

but the narrowest one in this emulsion system can reach 1.64.Essentially

no difference was found between emulsion and suspension polymerization in "living"character but in kinetics.It was found that the pH-value decreased in the course of polymerization

the descending rate of pHvalue may influence on polymerization rate.

关键词

原子转移自由基聚合乳液聚合配合物催化剂苯乙烯

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