Alloys composed of super-engineering plastics as alternative materials for metals

本研究制备了聚对苯硫醚(PPS)与甲基丙烯酸乙二醇酯(EGMA)(或EGMA接枝PMMA或PS)的二元合金以及加入聚苯醚(PPE)的三元合金，并对其结构和性能进行了研究。结果表明，加入少量的EGMA可显著提高PPS的延展性和韧性，且EGMA主要与PPS发生反应，但由于PS链段与PPE之间的相容性，PS接枝链的引入促进了EGMA与PPE之间的反应。根据EGMA种类的不同，在界面处原位形成的共聚物停留在界面上或形成胶束，从而导致共混物的形态和性能不同。所得三元合金的介电常数低于3。

In this study, binary alloys of poly(p-phenylene sulfide) (PPS) with poly(ethylene-ran-glycidyl methacrylate) (EGMA) (or EGMA grafted either with PMMA or PS) and ternary alloys by additionally incorporating poly(phenylene ether)(PPE) were prepared and their structure and properties were elucidated. It was observed that addition of a small amount of EGMA to PPS significantly enhances the ductility and toughness and that EGMA predominantly reacts with PPS, however, the incorporation of the PS graft chain into the EGMA promotes a reaction between EGMA and PPE due to the contribution of miscibility between PS segments and PPE. And depending on the kind of EGMA, copolymers formed in situ at the interface stay at the interface or form micelles, which results in different morphology and properties of the blends. The resultant ternary alloys showed low dielectric constant of under 3.