Crystallization of poly(ethylene adipate) within γ-phase poly(vinylidene fluoride) matrix

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• 作者：Hai-jun Wang ; Hui-ping Feng ; Xue-chuan Wang…
• 关键词：Crystallization ; Blends ; Poly(vinylidene fluoride) ; Poly(ethylene adipate)
• 刊名：Chinese Journal of Polymer Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：33
• 期：6
• 页码：823-829
• 全文大小：1,289 KB
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• 作者单位：Hai-jun Wang (1)
  Hui-ping Feng (1) (2)
  Xue-chuan Wang (1) (2)
  Qing-chuan Du (3)
  Chao Yan (3)
  
  1. Shaanxi University of Science and Technology, Xi’an, 710021, China
  2. Shaanxi Research Institute of Agricultural Products Processing Technology, Xi’an, 710021, China
  3. School of Material Science & Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

The effects of PEA on the γ-phase PVDF crystal structure and the crystallization of PEA within the pre-existing γ-phase PVDF spherulites have been investigated by optical microscopy (OM), infrared spectroscopy (IR) and scanning electron microscopy (SEM). The results demonstrate that the γ-phase PVDF spherulites consist of the lamellae exhibiting a highly curved scroll-like morphology and develop preferentially in PEA-rich blend. With increasing PEA concentration, the scroll diameter increases and the scrolls are better separated from each other. PEA crystallizes first in the interspherulitic region and transcrystalline layer develops. Subsequently, the transcrystalline layer of PEA continues to grow within the γ-phase PVDF spherulites, e.g., in the region between the scrolls, until impinging on other PEA transcrystalline layers or spherulites. The crystallization kinetics results indicate that the growth rate of PEA crystals in the intraspherulitic region of γ-phase PVDF shows a positive correlation with content of PEA, but a negative one with the crystallization temperature of γ-phase PVDF.