摘要
以甲基丙烯酸缩水甘油酯接枝改性聚丙烯（ＰＰｇＧＭＡ）作为界面改性剂，采用粒径可控的反应性核壳胶粒与ＰＰ进行反应共混，研究了反应共混物的结构与性质．用化学分离结合光谱表征的方法，对熔融共混时发生的原位反应进行了表征；以共混物平衡扭矩为参数考察了界面改性剂对共混物熔体扭矩的影响；用示差扫描量热法（ＤＳＣ）研究了共混物中ＰＰ的结晶行为．结果表明，红外谱图上１ ４９３ ｃｍ － １及２ ７００～３ ０００ ｃｍ － １处的吸收峰可用于共混反应的鉴定；与非反应共混相比，反应共混使熔体的平衡扭矩升高；ＰＰｇＧＭＡ对ＰＰ结晶有促进作用。
Reactive core shell particles with controllable sizes were reactively blended with polypropylene (PP) by the addition of glycidyl methacrylate (GMA) grafted PP (PP g GMA) as interfacial modifier. Structure and properties of the reactive blends were studied. The reaction occurred during melt blending was characterized by IR. The effects of interfacial modification on torque of blend melt and crystallization behavior of PP were investigated. The results show that the absorption at 1 493 cm -1 and 2 700~3 000 cm -1 on the IR spectrum can be used to identify the in situ reaction during melt blending. Reactive blending has an effect on increasing the equilibrium toque of melt in relative to non reactive blending, however, no evident reaction peak can be observed on the torque time curve during reactive blending. The increase of PP crystallization temperature in the reactive blends indicates that PP g GMA and core shell particle have a synergistic effect on promoting the crystallization of PP due to interfacial grafting.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1999年第10期1224-1227,共4页
Journal of Shanghai Jiaotong University
关键词
聚丙烯
核壳胶粒
反应共混
结晶
改性
polypropylene
core shell particles
reactive blending
crystallization
