Cyclic Polyphenylene Sulfide as Additive to Improve the Mechanical Properties of Polystyrene-Based Materials

Cyclic polyphenylene sulfide (PPS) is an unavoid-able byproduct of the preparation of linear PPS, one of the most important engineering plastics. Turning the waste into treasure is the best way to address byproducts, prevent pollution, and save energy and resources. Cyclic PPS's potential to be used in supramolecular chemistry was proven as an additive to enhance the mechanical properties of polystyrene (PS)-based materials. After the addition of cyclic PPS, the toughness of poly(styrene-co-ethyl acrylate) (PS-PEA) was approximately 4 times that of PS, and the value of Young's modulus saw a slight increase. Cyclic PPS was found to form reversible and movable cross-links with PS-PEA and increase the homogeneity of PS-PEA. Thus, the results of this study provide not only a way to make use of cyclic PPS but also an easy and practical method to prepare reinforced PS-based polymers.

Automated summary

Cyclic polyphenylene sulfide (PPS) is an unavoidable byproduct of linear PPS production. Utilizing cyclic PPS as an additive in supramolecular chemistry can improve the mechanical properties of polystyrene-based materials. It was found that the addition of cyclic PPS significantly increased the toughness of PS-PEA and slightly increased the Young's modulus. Additionally, cyclic PPS formed reversible and movable cross-links with PS-PEA, promoting homogeneous blending. This study not only provides a method to utilize cyclic PPS but also offers a practical approach to preparing reinforced PS-based polymers.