| abstract |
[PROBLEMS] To improve secondary formability while maintaining basic characteristics such as heat resistance, low dielectric constant, and mechanical strength. A polyphenylene sulfide foam is composed of a polyphenylene sulfide resin having a repeating unit represented by the general formula (a), and has a crystallinity of less than 20%. -(Ar-S) -... (a) In the general formula (a), “Ar” is an aryl group. [Selection figure] None |