化学工程2011，Vol.39Issue(11)：66-69,78,5.
分批加入溶剂及引发剂对聚醋酸乙烯酯支链的影响
Influence of adding solvent and initiator in batches on polyvinyl acetate chain branching
刁春霞 1高慧慧 2卓平 1蔡建国2
作者信息
- 1. 中国石化上海石油化工股份有限公司,上海200540
- 2. 华东理工大学化学工程研究所产品工程系,上海200237
- 折叠
摘要
Abstract
With methanol as solvent and azobisisbutyronitrile (AIBN) as initiator, the vinyl acetate polymerization process was studied. Gel permeation chromatography(GPC) and viscosity testing method were used to determine polyvinyl acetate (PVAc) and polyvinyl alcohol (PVA) polymerization degree respectively, and by comparing the difference of polymerization degree between PVAc and PVA before and after alcoholysis, the influence of process parameters such as two-step adding way for solvent and initiator and reaction time on PVAc chain branching were studied. The results show that the chain branching can be controlled, and the gap between PVAc and PVA polymerization degree can be reduced by adding solvent in two steps under the condition of total mass fraction of solvent 20% and total mass fraction of initiator 0. 000 63% , and can obtain higher polymerization degree of PVA within certain reaction time. The chain branching is increased by adding initiator in two steps and the gap between PVAc and PVA polymerization degree is enlarged. The chain branching is increased when the total reaction time is more than 7 h in both one-step or two-step solvent adding way, and the PVA polymerization degree is reduced to more than 31.6% compared with PVAc after alcoholysis.关键词
聚醋酸乙烯酯/聚乙烯醇/溶剂/支链Key words
PVAc/PVA/solvent/chain branching分类
化学化工引用本文复制引用
刁春霞,高慧慧,卓平,蔡建国..分批加入溶剂及引发剂对聚醋酸乙烯酯支链的影响[J].化学工程,2011,39(11):66-69,78,5.
