PREPARATION AND CHARACTERIZATION OF POLY(BUTYL ACRYLATE-ETHYLHEXYL ACRYLATE)/POLYVINYL CHLORIDE COMPOSITE LATEX

PAN Mingwang; ZHANG Liucheng

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PREPARATION AND CHARACTERIZATION OF POLY(BUTYL ACRYLATE-ETHYLHEXYL ACRYLATE)/POLYVINYL CHLORIDE COMPOSITE LATEX

Research Article | 更新时间：2021-03-19

- PREPARATION AND CHARACTERIZATION OF POLY(BUTYL ACRYLATE-ETHYLHEXYL ACRYLATE)/POLYVINYL CHLORIDE COMPOSITE LATEX
- Acta Polymerica Sinica Issue 4, Pages: 513-518(2003)
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- Published：20 August 2003，
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PAN Mingwang, ZHANG Liucheng. PREPARATION AND CHARACTERIZATION OF POLY(BUTYL ACRYLATE-ETHYLHEXYL ACRYLATE)/POLYVINYL CHLORIDE COMPOSITE LATEX. [J]. Acta Polymerica Sinica (4):513-518(2003)
DOI：

PAN Mingwang, ZHANG Liucheng. PREPARATION AND CHARACTERIZATION OF POLY(BUTYL ACRYLATE-ETHYLHEXYL ACRYLATE)/POLYVINYL CHLORIDE COMPOSITE LATEX. [J]. Acta Polymerica Sinica (4):513-518(2003) DOI：

摘要

采用乳液聚合法合成了丙烯酸丁酯与丙烯酸 2-乙基己酯交联共聚物 [P(BA-EHA) ]乳液

以P(BA-EHA)乳液为种子通过与氯乙烯 (VC)聚合制备了P(BA-EHA)/PVC复合胶乳.考察了P(BA-EHA)乳液用量对复合胶乳粒径及其材料力学性能的影响

借助透射电镜 (TEM)、扫描电镜(SEM)和动态力学分析(DMA)等手段对复合胶乳粒子及其所制材料的形态结构进行了表征.DMA研究结果表明

橡胶相P(BA-EHA)与基体PVC间相容性得到了良好改善.随着P(BA-EHA)含量的增加

低温区材料的力学损耗峰较纯聚氯乙烯增强

且峰位逐渐向高温区移动.TEM照片显示

复合胶乳粒子具有清晰的核壳结构;P(BA-EHA)非常均匀地分散在PVC中

两相界面模糊 .由SEM照片可见

材料缺口断面表现为很好的韧性断裂 .含 4.2% P(BA-EHA)材料的缺口抗冲强度是PVC的11倍

断裂伸长率较PVC提高近两倍.

Abstract

The crosslinked poly(butyl acrylate-co-2-ethylhexyl acrylate)[P(BA-EHA)] latex was synthesized by emulsion polymerization．In the presence of P(BA-EHA) latex

P(BA-EHA)／PVC composite latex was prepared by copolymerization with vinyl chloride in an autoclave．The effects of the amount of P(BA-EHA) latex on the latex particle diameters and mechanical properties of P(BA-EHA)／PVC materials were investigated．The morphology of the materials or the composite latex particles was characterized with the aid of TEM or SEM and dynamic mechanical analysis (DMA)．DMA measurements illustrated that the compatibility between P(BA-EHA) and PVC was well improved．With increasing the P(BA-EHA) content

the loss peak in low temperature range became higher than that of pure PVC

and the maximum value of the loss peak gradually shifted to higher temperature．TEM studies showed that the composite particles had a clear core-shell structure

P(BA-EHA) uniformly dispersed in PVC matrix

the interface between the two phases was indistinct．The fractured surface of the notched sample exhibited clear toughness characteristics．The notched impact strength of the material with 4.2％ P(BA-EHA) was eleven times as large as that of PVC

and the elongation percentage at break was about three times that of PVC．

关键词

核壳结构聚氯乙烯复合胶乳聚丙烯酸酯接枝氯乙烯种子乳液聚合形态结构

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