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中南大学学报(自然科学版)

Journal of Central South University

第43卷    第2期    总第210期    2012年2月

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文章编号:1672-7207(2012)02-0455-05
聚偏氟乙烯/偏氟乙烯-三氟氯乙烯共聚物的
共混相容性及结晶性
李衡峰1, 2,谢玲1,边宏1,李俊1

(1. 中南大学 材料科学与工程学院,湖南 长沙,410083;
2. 中南大学 粉末冶金国家重点实验室,湖南 长沙,410083
)

摘 要: 将聚偏氟乙烯(PVDF)颗粒与偏氟乙烯-三氟氯乙烯共聚物(P(VDF-CTFE))物理共混后采用溶液浇注的方法制备成共混薄膜。通过差示扫描量热仪、X线衍射、傅里叶变换红外光谱和扫描电镜等方法对PVDF/P(VDF-CTFE)共混薄膜的相容性、结晶行为及表面形貌进行分析。研究结果表明:PVDF/P(VDF-CTFE)体系中P(VDF-CTFE)作为一种无规共聚物在与PVDF共混时有一定的相容性,影响着PVDF的结晶-熔融热力学特征;PVDF/P(VDF-CTFE)共混结晶时,P(VDF-CTFE)的存在有利于形成β型晶体;PVDF均匀地分散在P(VDF-CTFE)相中,而且随着PVDF含量的减少, 分散点的PVDF球晶数量越少。

 

关键字: 聚偏氟乙烯;偏氟乙烯-三氟氯乙烯共聚物;共混;相容性;结晶性

Miscibility and crystalline properties of poly(vinylidene fluoride)/poly(vinylidene fluoride-trifluorochloroethylene) blends
LI Heng-feng1, 2, XIE Ling1, BIAN Hong1, LI Jun1

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:The poly(vinylidene fluoride)/poly(vinylidene fluoride-chlorotrifluoro ethylene) blend membranes were prepared by a solution cast approach after physical blending. The miscibility, crystallization properties and surface morphology of the samples were investigated by differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectra and scanning electron microscopy. The results show that the random copolymer P(VDF-CTFE) in the PVDF/P(VDF-CTFE) blends has a certain miscibility with PVDF, which affects the crystal-melt thermodynamic characteristics of PVDF. In PVDF/P(VDF-CTFE) blend crystallization process, P(VDF-CTFE) is beneficial for the formation of β phase. PVDF is well distributed in the PVDF/P(VDF-CTFE) blends. The spherulite is reduced by decreasing the content of the PVDF.

 

Key words: poly(vinylidene fluoride); poly(vinylidene fluoride-trifluorochloroethylene); blend; miscibility; crystalline property

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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