摘要
通过差示扫描量热法(DSC)和X射线衍射(XRD)来研究动态交联聚丙烯(PP)/乙烯-醋酸乙烯酯共聚物(EVA)共混物中PP非等温结晶动力学和晶体结构.结果表明:Ozawa方程适合于描述动态交联PP/EVA共混物中PP的非等温结晶动力学过程.EVA颗粒和动态交联的EVA颗粒都能够对PP的结晶起到异相成核剂的作用,促进PP的结晶.PP/EVA共混物和动态交联PP/EVA共混物中的PP结晶活化能(△E)均小于纯PP的△E,且后者略小于前者.共混和动态交联都没有改变共混物中PP的晶体结构.
The non-isothermal crystallization kinetics and crystal structure of dynamic crosslinked polypropylene （PP）/ ethylene-vinyl acetate copolymer （EVA） blends was studied by means of Differential Scanning calorimeter （DSC） and X-ray diffraction （XRD）, respectively. The results show that Ozawa equation is suitable for describing the non-isothermal crystallization kinetics of PP in the dynamic crosslinked PP/EVA blends. EVA particles and the dynamic crosslinked EVA particles are able to play the role of heterogeneous nucleation agent to promote the crystallization of PP. The crystallization activation energy （AE） of PP in PP/EVA blends and dynamic crosslinked PP/EVA blends are less than that in pure PP, and the latter is slightly less than the former. Blending and dynamic erosslinked do not change the crystal structure of PP in the blends.
出处
《武汉工程大学学报》
CAS
2012年第11期1-5,共5页
Journal of Wuhan Institute of Technology
基金
湖北省自然科学基金(2011CBD220)
武汉工程大学研究生教育创新基金项目(20110034)
2012年度武汉工程大学校长基金
关键词
聚丙烯
乙烯-醋酸乙烯酯共聚物
非等温结晶
动态交联
异相成核剂
polypropylene
ethylene-vinyl acetate copolymer~ nonisothermal crystallization~ dynamiccrosslinked~ neterogeneous nucleation agent
