摘要
采用以ＰＭＭＡ为壳，聚丙烯酸丁酯为核的“壳－核”型聚合物作为冲击改性剂，并以双酚Ａ型环氧树脂（ＤＧＥＢＡ）为增容剂，通过反应挤出法制备了尼龙６／“壳－核”型聚合物共混合金。对合金力学性能与亚微形态的研究表明，在合金中添加ＤＧＥＢＡ可以显著改善尼龙６与“壳－核”型聚合物的界面粘接性和相容性，从而大幅度地提高了合金的缺口冲击强度，同时合金的断裂伸长率也显著提高。Ｂｒａｂｅｎｄｅｒ动态扭矩显示，ＤＧＥＢＡ与尼龙６中的官能团发生了反应，形成化学键；并通过氢键作用，加强了基体与“壳－核”型聚合物间的相互作用。ＳＥＭ研究显示，“壳－核”型聚合物与尼龙６相容性差，粒子在基体中不能达到良好的分散性。而在合金中添加ＤＧＥＢＡ后，“壳－核”型聚合物粒子在基体中的分散性和规律性则明显提高。
The blends of polyamide 6 and core shell type copolyemr, based on PMMA shell and on poly(butyl acrylate) core, were prepared through reacting extrudation, and diglycidyle ether of bisphenol A (DGEBA) epoxy resin as compatibilizer was added. The mechanical property and morphology were invesitgated in this study. It was found that the miscibility between the matrix and impact modifier enhanced through the functional group reaction of DGEBA and nylon 6, and the Izod impact strength of the ternary blends was improved remarkablely. Scanning electron micrograph (SEM) shows that the core shell type copolymer exhibits a smaller particle diameter and a more regular and finer dispersion with the addition of DGEBA. The super toughness of blends seems to be attributed to both reduce impact modifier particle size and improve interfacial adhesion after compatibilizer was added.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第1期89-93,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
增韧
共混
高聚物
橡胶
聚酰胺
力学性质
the core shell type copolymer, toughening, compatibilizer, blends
