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聚偏氟乙烯(PVDF)/聚己内酯(PCL)共混体系的晶体结构和形貌

作者:时间:2014-07-15点击数:

PDF全文下载:2014030241 

王海军1,2,冯会平1,赵庭山1,王学川1,2,郝兴娟1

 (1.陕西科技大学 教育部轻化工助剂重点实验室,陕西 西安 710021;

2.陕西农产品加工技术研究院,陕西 西安 710021)

 摘要: 使用偏光显微镜(POM)和扫描电子显微镜(SEM)等测试手段,研究了PVDF/PCL共混体系在不同配比和结晶温度下晶型结构、球晶和片晶形貌的变化规律。结果表明:PVDF在低温下形成α型球晶,在高温下形成γ型球晶;两种不同晶型的球晶尺寸均随着结晶温度的升高而增大;α型PVDF环带球晶的环带间距随着体系内PCL含量的增多而增大。此外,共混体系内γ型PVDF球晶的含量也随着PCL含量的增大而增大。

 关键词: 聚偏氟乙烯(PVDF); 聚己内酯(PCL); 晶体结构; 形貌

 中图分类号: O 793文献标志码: A

 收稿日期: 20130910

基金项目: 国家自然科学基金项目(21204045);陕西科技大学博士科研启动基金项目(BJ1108);陕西省自然科学基金项目(2011JQ2004).

作者简介: 王海军(1978—),男,讲师,博士.

Crystal Structure and Morphology of Poly(Vinylidene Fluoride)/Poly(εCaprolactone) Blends

 WANG Haijun1,2, FENG Huiping1, ZHAO Tingshan1, WANG Xuechuan1,2, HAO Xingjuan1

 (1.Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry,Ministry of Education,ShaanxiUniversityof Science and

Technology, Xi′an 710021, China;2.Shaanxi Research Institute of Agricultural Products Processing Technology, Xi′an 710021, China)

 Abstract: The crystal structure, spherulitic and lamellar morphologies of poly(vinylidene fluoride) (PVDF)/poly(εcaprolactone) (PCL) blend were studied by means of POM and SEM. It was found that in the PVDF/PCL blends, a low crystallization temperature is in favor of the formation of αform PVDF crystals. However, a high crystallization temperature induces the growth of γtype ones. The sizes of the two types of spherulites increase with the crystallization temperature increasing. The interspacing distance of αform PVDF spherulites increases with PCL content increasing. In addition, the amount of γtype PVDF spherulites also increases with the crystallization temperature and the PCL content increasing.

Key words:  poly(vinylidene fluoride); poly(εcaprolactone); crystal structure; morphology

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