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Citation: LIN Zhi-Yonga, LIN Jin-Qing, YE Wei, ZENG Han-Min. The Acylation of Carbon Fiber Surface and Its Graft Polymerization with Polyamide 6 Ⅱ.The Isothermal Crystallization and Melting Behavior of CF/PA6 Composites[J]. Chinese Journal of Applied Chemistry, ;2004, 21(9): 932-936. shu

The Acylation of Carbon Fiber Surface and Its Graft Polymerization with Polyamide 6 Ⅱ.The Isothermal Crystallization and Melting Behavior of CF/PA6 Composites

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a College of Material Science and Engineering, Huaqiao University, Quanzhou 362011;
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b Key Laboratory of Polymer Composite Material and Functional Material, Chinese Ministry of Education, Guangzhou

Corresponding author: LIN Zhi-Yonga,
Received Date: 18 December 2003
Available Online: 2 June 2004
Fund Project: 国家自然科学基金(59602007) (59602007)福建省自然科学基金(E9910023,E0110023,E0210022) (E9910023,E0110023,E0210022)聚合物复合材料及功能材料教育部重点实验室访问学者基金(1999-2-01)资助项目 (1999-2-01)

The isothermal crystallization behavior and melting characteristics of CF/PA6 composites have been studied by DSC. The results show that the ungrafted carbon fiber in CF/PA6 composites played the role of nucleating agent, which enhances the crystallization rate and increase the apparent crystallization degree of PA6. The grafting CF improved the interface adhesion between PA6 and CF, which prohibits the movement of PA6 molecule thus leading to reduce the crystallization rate and the apparent crystallization degree of PA6. The interphase chemistry property of grafting CF/PA6 composites was similar due to grafting, thus the inducing transcrystallization ability of grafting CF was improved. At lower crystallization temperature, ungrafted CF induces PA6 matrix to form α crystal and inhibits the form of γ crystal, grafting CF enhances the interface interaction between CF and PA6, thus prohibits PA6 from forming stable crystal and produces metastable γ^* crystal.At higher crystallization temperature, the induction effect of ungrafted CF declined, and PA6 matrix intended to form γ crystal as the pure PA6, but grafting CF urges PA6 to form metastable γ^* crystal as it did at lower crystallization temperature.
- carbon fiber,
- anionic graft polymerization,
- CF/PA6 composite,
- isothermal crystallization,
- melting characteristic
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