ε-己内酰胺阴离子环聚合在快速生产热塑性复合材料中的流变动力学研究

Karima Ben Hamou, Ralf Brüning, Gabriel La Plante, Marie-Hélène Thibault, Jacques Robichaud and Yahia Djaoued
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引用次数: 0

摘要

本研究主要研究了聚ε-己内酰胺(PA6)的合成和结构分析。聚ε-己内酰胺是用单功能和双功能活化剂,通过负离子聚合法制备的。本研究考察了不同聚合条件下合成的PA6的物理性质,旨在了解这些条件如何影响聚合物的行为。通过动态流变学对聚合动力学进行了监测,为ε-己内酰胺转化为PA6的过程提供了新的思路。系统地研究了PA6样品的微观结构变化,包括结晶度的变化以及α和γ晶体结构的形成。这些转化取决于所使用的活化剂的类型和浓度,以及所应用的特定聚合参数。这些因素之间的相互作用显著影响了PA6样品的化学和物理结构。在研究的后半部分,通过反应处理将两种不同类型的纤维织物增强聚-ε-己酰胺制成混杂复合材料,增强率达到25%。扫描电子显微镜(SEM)显示纤维和聚合物基体之间具有良好的界面粘附性,证实了制造工艺的有效性以及这些复合材料在先进材料应用方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Rheokinetics of ε-caprolactam anionic-ring polymerization applied to the rapid production of thermoplastic composites†

Rheokinetics of ε-caprolactam anionic-ring polymerization applied to the rapid production of thermoplastic composites†

The present study focuses on the synthesis and structural analysis of poly-ε-caproamide (PA6), produced through anionic polymerization of ε-caprolactam in bulk, utilizing mono and bifunctional activators. The research investigates the physical properties of PA6 synthesized under various polymerization conditions, aiming to understand how these conditions influence the polymer's behavior. The polymerization kinetics were monitored via dynamic rheology, offering insights into the progression of ε-caprolactam's conversion into PA6. Microstructural changes in the PA6 samples, including variations in the degree of crystallinity and the formation of α and γ crystalline structures, were systematically studied. These transformations were dependent on both the type and concentration of the activator used, as well as the specific polymerization parameters applied. The interplay between these factors significantly impacted the resulting chemical and physical structure of the PA6 samples. In the latter part of the study, hybrid composites were fabricated by reinforcing poly-ε-caproamide with two distinct types of fiber fabrics by reactive processing, achieving a 25% weight fraction of reinforcement. Scanning electron microscopy (SEM) revealed excellent interfacial adhesion between the fibers and the polymer matrix, confirming the effectiveness of the fabrication process and the potential of these composites for advanced material applications.

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