文献类型：期刊文献

中文题名：悬浮聚氯乙烯对增塑剂吸收的时温特性

英文题名：Effect of Time and Temperature on Plasticizer Absorption of Suspension Poly(vinyl chloride) Resin

作者：袁东明[1];沈春银[1];孙斌[1];戴干策[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2011

卷号：37

期号：3

起止页码：281

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：聚氯乙烯;增塑;吸收;形态

外文关键词：S-PVC; plasticize; absorption; morphology

摘要：测定了悬浮聚氯乙烯(S-PVC)树脂对增塑剂不同温度下的吸收量,采用扫描电镜表征了S-PVC不同增塑剂吸收条件下的结构形态。结果表明:S-PVC颗粒由多级粒子聚集而成,增塑剂主要通过各级粒子聚集体间的间隙沟槽进入PVC粒子内部完成润展与溶胀,S-PVC对增塑剂的吸收是具有时间和温度依赖性的四步吸收非定态过程。其吸收包括树脂颗粒间隙润展吸收缓慢的"第1诱导期",聚集粒子间隙润展溶胀吸收加快的"第1溶胀期",初级粒子间润展吸收速率缓慢的"第2诱导期",以及分子链间溶胀吸收的"第2溶胀期"。温度越高诱导期越短,溶胀越快。
Plasticizer absorption of suspended poly（vinyl chloride）（S-PVC） were determined under various time and temperature.The morphology of S-PVC grains under different plasticizer absorption conditions was characterized by scanning electron microscopy（SEM）.The results showed that S-PVC grains were composed of multilevel particles,and there were grooves and pore channels among these particles.The S-PVC grains were spread and swelled by plasticizers entering through those grooves.The plasticizer adsorption of S-PVC which depended on temperature and time was a four-step unsteady process,named ＂first induction period＂,＂first swelling period＂,＂second induction period＂,and ＂second swelling period＂.At the ＂first induction period＂,the grooves of S-PVC grains were slowly wetted and spread by plasticizers;the pores among the agglomerates were swelled with an accelerated absorption at the ＂first swelling period＂;while at the ＂second induction period＂,the intervals among the primary particles were slowly swelled after a swelling equilibrium;and at the ＂second swelling period＂,the space between molecular chains were rapidly occupied and swelled by plasticizers.Shorter induction period and higher swelling rates were gained at higher temperature.