苯乙烯乳液聚合实验的反应条件探索.pdf

·26 · 唐晓红等，苯乙烯乳液聚合实验的反应条件探索 Vol． 34，No． 2 ，2012 苯乙烯乳液聚合实验的反应条件探索 唐晓红，李成未，林 钰 （河南教育学院化学系，河南 郑州450046） 摘要：分别考察了主单体配比、功能性单体用量、乳化剂用量、引发剂用量与反应温度对苯乙烯乳液聚合反应的影响，以获 得最佳的实验聚合条件。结果表明：在St ∶MMA(质量比)为1.0，复合型乳化剂用量为5%，SDS ∶OP- 10(质量比)为1 ∶1，引发剂 用量为0.5% ，丙烯酸用量为3% ，反应温度为75℃，油水比为1 的最佳乳液聚合条件下, 可得到黏度和颗粒尺寸均匀适中、涂 膜性能优良的苯丙乳液。 关键词：苯乙烯；乳液聚合；实验教学；实验探索 中图分类号：TQ 325.2 文献标识码：A 文章编号：1001- 0017（2012）02- 0026- 04 Exploration of Reaction Conditions of Styrene Emulsion Polymerization Experiment TANG Xiao-hong, LI Cheng-wei and LIN Yu （Department of Chemistry, Henan Institute of Education, Zhengzhou 450046, China） Abstract: The effects of main monomer ratio, functional monomer, emulsifier and initiator content and reaction temperature on styrene emulsion polymerization were investigated to get the optimal polymerization conditions. The experimental results showed that the optimum conditions were as follows: St∶MMA (mass ratio) was 1.0, composite emulsifier content was 5%, SDS ∶OP-10 (mass ratio) was 1∶1, initiator content was 0.5%, acrylic acid content was 3%, reaction temperature was 75 ℃ and ratio of oil to water was 1. Under the above conditions, the styrene-acrylic emulsion with appro － priate viscosity, particle size and good film properties could be obtained. Key words: Styrene; emulsion polymerization; experiment teaching; experiment exploration 凝聚沉析，过滤分离可得到聚合物。本实验选用苯 前 言 乙烯作为硬单体, 甲基丙烯酸甲酯作为软单体,丙烯 酸作为功能性单体, 采用预乳化的半连续加料方式 通过对聚合物颗粒粒径和乳液黏度大小的控 [ 1 ] 进料。在苯乙烯乳液聚合过程中，主单体