聚苯硫醚（Polyphenylene sulfide，缩写PPS）是分子中含有对亚苯基硫醚重复结构单元的聚合物，是一种新型功能性工程塑料。

聚苯硫醚为白色至微黄色粉末，玻璃化转变温度89 °C，热变形温度＞260 °C，具有较高的热稳定性，可在220 °C时连续使用。具有自熄性。耐化学腐蚀性优异，对有机醇、酮、酸、酯、芳香烃、氯代烃以及无机酸、碱、盐均稳定。溶于氯代联苯，不溶于170 °C以下的大多数溶剂。自身是绝缘体，但氧化或掺杂后可成为半导体。

Polyphenylene sulfide (PPS) is an organic polymer consisting of aromatic rings linked with sulfides. Synthetic fiber and textiles derived from this polymer are known to resist chemical and thermal attack. PPS is used to make filter fabric for coal boilers, papermaking felts, electrical insulation, specialty membranes, gaskets, and packings. PPS is the precursor to a conducting polymer of the semi-flexible rod polymer family. The PPS, which is otherwise insulating, can be converted to the semiconducting form by oxidation or use of dopants.