交替层状受限空间下聚偏氟乙烯横晶的调控与结晶动力学  

Crystal Structure Regulation and Crystallization Kinetics of Polyvinylidene Fluoride Transcrystals in Alternate Layered Confined Spaces

作　　者：唐锐[1] 李姜[1] 郭少云[1] Rui Tang;Jiang Li;Shaoyun Guo(Polymer Research Institute,State Key laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学高分子研究所高分子材料与工程国家重点实验室(四川大学)

出　　处：《高分子材料科学与工程》2019年第10期55-60,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51873112)

摘　　要：采用模压成型技术构筑了8层交替层状结构,其中一层为聚甲基丙烯酸甲酯(PMMA)与聚偏氟乙烯(PVDF)的共混物,一层为PVDF与自组装成核剂(TMB-5)的共混物。采用差示扫描量热法表征了层状共混物的结晶行为。实验结果表明,加入1%的TMB-5能使PVDF的结晶温度(Tc)提高5℃左右,PMMA的加入能有效抑制聚偏氟乙烯的结晶。探究多层样的结晶动力学表明,在等温与非等温结晶条件下,多层样结晶方式介于球晶与横晶生长。通过偏光显微镜观察发现在层状受限下,PVDF在层界面诱导形成了大量的PVDF横晶。An alternating layered structure was constructed by compression molding technique, one of which was a blend of polymethylmethacrylate(PMMA) and polyvinylidene fluoride(PVDF), and another layer was a blend of PVDF and a self-assembled nucleating agent(TMB-5). The crystallization behavior of the each layered blends was characterized by differential scanning calorimetry(DSC). The experimental results show that the addition of 1% of TMB-5 can increase the crystallization temperature(Tc) of PVDF by about 5 ℃, and the addition of PMMA could effectively inhibit the crystallization of PVDF. The crystallization kinetics of the multi-layer sample was investigated. The results show that the crystallization growth mode of multi-layer is between two-dimensional growth and three-dimensional growth under the conditions of isothermal and non-isothermal crystallization. A large number of PVDF transcrystals are found in the layer interfaces by polarizing microscope(POM).

关 键 词：聚偏氟乙烯 层状受限 横晶 聚甲基丙烯酸甲酯 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]