摘要
采用悬浮聚合法合成了可发性聚苯乙烯(EPS),研究了戊烷用量对EPS粒径、产品细粉率、玻璃化转变温度、分子量和戊烷在EPS产品中分散情况的影响,并通过DSC、GPC和电子显微镜分析手段对产品进行了测试。结果表明,戊烷用量的增加使产品的平均粒径增加,玻璃化转变温度和分子量减小;当戊烷用量为2.14%(质量分数)时,戊烷在产品中分散较好,当用量为2.67%时,细粉率达到最小值0.42%。
Expanded polystyrene（EPS） has been prepared in a reactor by suspension polymerization.The effect of varying the amount of pentane present on the average partical diameter of the EPS,the proportion of small particles,the glass transition temperature,the molecular weight and the dispersion of pentane within the EPS were investigated.Differential scanning calorimetry,gel permeation chromatography and electron microscopy showed that with increasing amounts of pentane the average diameter of the EPS increased,while the glass transition temperature and molecular weight decreased.The choice of appropriate amounts of pentane leads to an increase in the pentane dispersion within the products,and the best dispersion of pentane was achieved with a pentane amount of 2.14%.The minimum proportion of small particles（0.42%） was obtained with a pentane amount of 2.67%.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期62-66,共5页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
关键词
发性聚苯乙烯
戊烷
粒径
细粉率
expanded polystyrene
pentane
particle diameter
proportion of small particles
