Citation: Zhen-bo Ning, Ronnie Nielsen, Li-fen Zhao, Dong-hong Yu, Zhi-hua Gan. Influence of Teflon Substrate on Crystallization and Enzymatic Degradation of Polymorphic Poly(butylene adipate)[J]. Chinese Journal of Polymer Science, ;2014, 32(9): 1243-1252. doi: 10.1007/s10118-014-1503-0 shu

Influence of Teflon Substrate on Crystallization and Enzymatic Degradation of Polymorphic Poly(butylene adipate)

Zhen-bo Ning ^1,2,3 ,
Ronnie Nielsen ^1,4,3 ,
Li-fen Zhao ⁵ ,
Dong-hong Yu ⁶ ,
Zhi-hua Gan ^1,7,3,,

1.
1. CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
2.
2. The Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3.
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2. Aalborg University, Section of Chemistry, Department of Life Sciences, Aalborg University, DK-9000, Aalborg, Denmark
5.
College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
6.
Aalborg University, Section of Chemistry, Department of Life Sciences, Aalborg University, DK-9000, Aalborg, Denmark
7.
2. State Key Laboratory of Organic-inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author: Zhi-hua Gan,
Received Date: 9 April 2014
Revised Date: 12 May 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 51025314) and the Oticon Foundation in Denmark.

Oriented and non-oriented Teflon films, which were found to have the same crystalline structure, but different surface morphologies, were used to sandwich poly(butylene adipate) (PBA) films during isothermal crystallization. It was found that both the Teflon surface structure and the PBA polymorphic structure are the determining factors to induce epitaxial crystallization. The oriented Teflon film was able to induce epitaxial crystallization of PBA crystal, while the non-oriented Teflon did not induce any epitaxial crystallization of PBA. Epitaxial crystallization did not occurred for PBA crystals between neither the oriented nor the non-oriented Teflon films. The enzymatic degradation rate of PBA films was not determined by the epitaxial crystallization, in fact it was still dependent on the polymorphic crystal structure of PBA. The morphological changes of PBA films after enzymatic degradation confirmed again that the epitaxial crystallization only occurred for the PBA film with crystal structure which was produced by being sandwiched between oriented Teflon films, and it happened only on the surface of PBA films.
- Poly(butylene adipate),
- Epitaxial crystallization,
- Polymorphic crystals,
- Enzymatic degradation,
- Morphology
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