Preparation and oxidation resistance of polyphenylene sulfide modified by high-temperature antioxidants. (14th April 2021)

• Record Type: Journal Article
• Authors: Xing, J; Xu, Z Z; Li, D W
• Is Part Of: Materials research express. Volume 8:Number 4(2021)
• Publication Date: 2021-04-14
• Subjects: Polyphenylene sulfide -- antioxidants -- oxidation resistance -- crystallization behavior -- thermal stability; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/abf52d
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Two types of high-temperature antioxidants (Revonox 608 and GA-80) were used to improve the oxidation resistance of polyphenylene sulfide (PPS) through melt blending, and the resistance against oxidation and other properties were characterized. The results showed that GA-80 exhibited better dispersibility and compatibility with the PPS matrix than did Revonox 608. Revonox 608 could act as a heterogeneous nucleation agent that can promote crystallization and improve the crystallinity of PPS, whereas GA-80 could delay the movement of chain segments and limit crystallization. The thermal-oxidative stability of PPS can be improved by adding antioxidants due to prior oxidative decomposition. The dynamic oxidation induction temperature of PPS increased by more than 10 °C because of the capture of free radicals and the decomposition of hydroperoxides by antioxidants. The XPS results showed that both GA-80 and Revonox 608 could retard the oxidative cleavage of the C-S-C bond in the PPS macromolecular chains and protect the S atoms from oxidizing to sulfone groups.