摘要
通过在苯乙烯无皂乳液聚合体系中加入两种不同冠醚得到了粒径差别悬殊的单分散聚苯乙烯(PS)纳米粒子,用透射电镜观察纳米粒子形貌和尺寸;凝胶渗透色谱法测定组成纳米粒子的聚合物相对分子质量;气相色谱法测定单体转化率。与不加冠醚的苯乙烯无皂乳液聚合相比,18-冠-6的加入使PS纳米粒子尺寸增加1倍;12-冠-4的加入却使PS纳米粒子尺寸下降了82%,说明冠醚的加入对苯乙烯无皂乳液聚合具有重要影响。
Combined with scientific research achievement,an exploratory polymer chemistry experiment of "Effect of Crown Ethers on the Mechanism of Styrene Soap-free Emulsion Polymerization"was designed. Monodisperse polystyrene nanoparticles with obviously different particle sizes were prepared with addition of two different crown ethers. The morphology and size of particles were observed by transmittance electron microscopy (TEM),the molecular weight of PS composed of nanoparticles was measured by gel permeation chromatography (GPC),and the monomer conversion was measured by gas chromatography (GC). Compared with styrene soap-free emulsion polymerization without crown ethers,the diameter of PS nanoparticles is doubled after the addition of 18-crown-6,whereas the value is decreased 82% with the presence of 12-crown-4.
作者
曲剑波
张晓云
李静
QU Jianbo;ZHANG Xiaoyun;LI Jing(College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China)
出处
《实验室研究与探索》
CAS
北大核心
2020年第10期5-8,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(21776310)
山东省自然科学基金项目(ZR2017MB019)
中国石油大学教育教学改革项目(YJD2019007)。
关键词
聚苯乙烯纳米球
冠醚
转化率
反应机理
无皂乳液聚合
polystyrene nanoparticles
crown ether
conversion
polymerization mechanism
soap-free emulsion polymerization
