引用本文:
林志勇, 林金清, 叶葳, 曾汉民. 碳纤维表面酰氯化及其与尼龙6的接枝Ⅱ.碳纤维接枝复合材料CF/PA6的等温结晶和熔融行为[J]. 应用化学,
2004, 21(9): 932-936.
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.
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.
碳纤维表面酰氯化及其与尼龙6的接枝Ⅱ.碳纤维接枝复合材料CF/PA6的等温结晶和熔融行为
摘要:
用DSC研究了碳纤维(CF)表面阴离子接枝尼龙6(PA6)后复合材料CF/PA6的等温结晶及熔融行为。结果表明,未接枝的CF对PA6结晶起异相成核作用,使PA6的结晶度增大。接枝改性CF增强了两相界面间的相互作用,促进成核,但使PA6大分子链的运动受到约束,使PA6的结晶度减小。接枝导致CF/PA6复合材料界面化学性质相似,因此,具有较高的诱发横穿晶能力。等温熔融结果表明,较低的结晶温度下,未接枝CF表面的诱导作用有利于基体PA6形成α晶型,接枝改性CF使PA6主要形成亚稳定的γ晶型。较高温度下,未改性CF使PA6主要形成γ*晶型;接枝改性CF使基体倾向于形成热稳定性较低的γ*型结晶。
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关键词:
- 碳纤维
- / 阴离子接枝
- / 碳纤维/尼龙6复合材料
- / 等温结晶
- / 熔融行为
English
The Acylation of Carbon Fiber Surface and Its Graft Polymerization with Polyamide 6 Ⅱ.The Isothermal Crystallization and Melting Behavior of CF/PA6 Composites
Abstract:
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.
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