Citation: Hai-jun Wang, Hui-ping Feng, Xue-chuan Wang, Qing-chuan Du, Chao Yan. Crystallization of Poly(ethylene adipate) within -Phase Poly(vinylidene fluoride) Matrix[J]. Chinese Journal of Polymer Science, ;2015, 33(6): 823-829. doi: 10.1007/s10118-015-1627-x shu

Crystallization of Poly(ethylene adipate) within -Phase Poly(vinylidene fluoride) Matrix

Hai-jun Wang ¹ ,
Hui-ping Feng ^2,3,4 ,
Xue-chuan Wang ^2,3,4 ,
Qing-chuan Du ⁵ ,
Chao Yan ⁵

1.
Shaanxi University of Science and Technology, Xi'an 710021, China
2.
1. Shaanxi University of Science and Technology, Xi'an 710021, China
3.
2. Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an 710021, China
4.
5.
School of Material Science &

Received Date: 23 September 2014
Revised Date: 3 November 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21204045 and 21276151), Key Scientific Research Group of Shanxi Province (No. 2013KCT-08) and Scientific Research Group of Shanxi University of Science and Technology (No. TD12-04).

The effects of PEA on the -phase PVDF crystal structure and the crystallization of PEA within the pre-existing -phase PVDF spherulites have been investigated by optical microscopy (OM), infrared spectroscopy (IR) and scanning electron microscopy (SEM). The results demonstrate that the -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 -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 -phase PVDF shows a positive correlation with content of PEA, but a negative one with the crystallization temperature of -phase PVDF.
- Crystallization,
- Blends,
- Poly(vinylidene fluoride),
- Poly(ethylene adipate)
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