β-Phase Crystallization of Poly(vinylidene fluoride) in Poly(vinylidene fluoride)/Poly(ethyl methacrylate) Blends  

作　　者：Zi-Jie Huang Jing Jiang Gi Xue Dong-Shan Zhou 

机构地区：[1]Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of High Performance Polymer Materials and Technology, and The State Key Laboratory of Coordination Chemistry, Nanjing University [2]School of Physical Science and Technology, Xinjiang Key Laboratory and Phase Transitions and Microstructures in Condensed Matters, Yili Normal University

出　　处：《Chinese Journal of Polymer Science》2019年第1期94-100,4-7,共7页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 21474049, 51673094 and 21404055);Tianshan Scholars Program by Yili Normal University;the Shenzhen Science and Technology Innovation Committee (Nos. JCYJ20160608140827794, JCYJ20160531151102203 and JCYJ20170818110206085)

摘　　要：The nature of the crystalline phase of poly(vinylidene fluoride)(PVDF) in compatible blends with poly(ethyl methacrylate)(PEMA) was investigated by using X-ray diffraction(XRD), infrared microscopy(IR) and differential scanning calorimetry(DSC). The βphase of PVDF was observed after quenching from the melt and further annealing above the glass transition temperature over a composition range. The PVDF/PEMA blend with weight ratio of 3:2 has formed higher content of PVDF β crystals than others. By taking advantage of fast cooling rate of ultrafast differential scanning calorimeter(UFDSC), the quenching process of blends was modeled and tested simultaneously, and the melting behavior of β crystals in all blends was investigated. Three types of crystallization behavior of βphase PVDF in blends were found after quenching-annealing at different temperatures.The nature of the crystalline phase of poly(vinylidene fluoride)(PVDF) in compatible blends with poly(ethyl methacrylate)(PEMA) was investigated by using X-ray diffraction(XRD), infrared microscopy(IR) and differential scanning calorimetry(DSC). The βphase of PVDF was observed after quenching from the melt and further annealing above the glass transition temperature over a composition range. The PVDF/PEMA blend with weight ratio of 3:2 has formed higher content of PVDF β crystals than others. By taking advantage of fast cooling rate of ultrafast differential scanning calorimeter(UFDSC), the quenching process of blends was modeled and tested simultaneously, and the melting behavior of β crystals in all blends was investigated. Three types of crystallization behavior of βphase PVDF in blends were found after quenching-annealing at different temperatures.

关 键 词：β-Crystal of PVDF MESOPHASE PVDF/PEMA BLEND Ultra-fast scanning CALORIMETRY 

分 类 号：O631[理学—高分子化学]