不同成核作用硅灰石对回收聚丙烯结晶性能的影响  

Influence of Wollastonite with Different Nucleation on Crystallization of Recycled Polypropylene

作　　者：丁茜 罗建新 刘勇 欧金花 

机构地区：[1]湖南工学院材料与化学工程学院,湖南衡阳421002

出　　处：《塑料科技》2017年第10期106-110,共5页Plastics Science and Technology

基　　金：湖南省自然科学基金资助项目(2016JJ6033);广东省高性能树脂基复合材料重点实验室(中山大学)开放课题基金

摘　　要：采用硅灰石(Wo)和具有β-成核作用硅灰石(β-Wo)制备了具有不同成核作用硅灰石填充回收聚丙烯(r-PP)复合材料,借助差示扫描量热仪、广角X射线衍射仪和偏光显微镜研究了具有不同成核作用硅灰石对r-PP结晶行为、熔融特性和结晶形态的影响。结果表明:Wo和β-Wo对r-PP结晶都具有异相成核作用,可以提高r-PP的结晶温度。Wo填充r-PP复合材料主要形成α晶,β-Wo可诱导r-PP形成大量高亮度的β晶,并且β-Wo具有的异相成核作用明显强于Wo。Wollastonite（Wo） and wollastonite with β-nucleation（β-Wo） were used to prepare wollastonite with different nucleation filled recycled polypropylene（r-PP） composites. The influence of wollastonite with different nucleation on the crystallization behavior, melting characteristics and crystalline morphology of r-PP were studied by means of differential scanning calorimeter, wide angle X-ray diffraction and polarized light microscope, respectively. The results indicate that both Wo and β-Wo exhibit heterogeneous nucleation, and increase the crystallization temperature of r-PP. Wo filled r-PP composites mainly form α-spherulites, while β-Wo can induce the formation of highly birefringent β-spherulites. Moreover, the heterogeneous nucleation of β-Wo is much stronger than that of Wo.

关 键 词：回收聚丙烯 β-成核作用 硅灰石 结晶性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]