A Succinic anhydride was used to attach carboxylic acid to the phenyl group of polyphenylene sulfide (PPS). The reactive PPS (hereinafter referred to as r-PPS) synthesized in this way was modified by dry blending with neat PPS, and then the m-PPS/m-POE (90/10) blends were prepared through an extruder. The color of the injection molded blend test specimen became grayer as the r-PPS content increased, which was presumed to be due to thermal decomposition. This is thought to be because some of the aliphatic chains of succinic acid were cleaved under high temperature processing conditions. As the r-PPS content increased, the tensile properties showed no difference or slightly decreased, while surprisingly, the impact strength improved by 200-300%. Therefore, even in the case of PPS that has no reactive groups available for modification, it is thought that it can be applied to various fields by manufacturing a blend through modification of PPS using carboxylation as in this study.

Succinic anhydride를 이용하여 폴리페닐렌 설파이드(PPS)의 phenyl기에 carboxylic acid를 붙였다. 이렇게 반응시킨 반응성 PPS(이하 r-PPS)를 순수한 PPS와 혼합하여 개질(m-PPS)한 후 엘라스토머(m-POE)와 함께 압출기를 통해 m-PPS/m-POE(90/10) 블렌드를 제조하였다. 사출 성형된 블렌드의 시험편의 color가 r-PPS 함량이 증가함에 따라 회색빛이 진해졌는데 이는 고온의 가공조건에서 일부 succinic acid의 aliphatic chain이 절단되었기 때문으로 판단되었다. 또한 r-PPS 함량 증가에 따라 인장특성은 차이가 없거나 약간 감소한 반면에 놀랍게도 충격강도는 200-300% 향상되었다. 따라서 개질에 이용할 수 있는 반응성기가 전혀 없는 PPS의 경우에도 본연구와 같이 카복실화를 이용한 PPS의 개질을 통해 블렌드를 제조함으로써 다양한 분야에의 응용이 가능할 것으로 사료된다.

Keywords: carboxylation, impact strength, blends, polyphenylene sulfide, poly(ethylene-co-glycidyl methacrylate).