Core-shell structure antioxidant microencapsulated piperazine pyrophosphate are designed to enhance the mechanical property, aging resistance and flame retardant of styrenic thermoplastic elastomer composites. In this study, the PAPP was wrapped with silica and then grafted with primary antioxidant 3-(3, 5-di-tert-butyl-4 hydroxyphenyl) (AO) for preparing double-shell wrapped flame retardants (MCPAPP). Because MCPAPP was well compatible with TPE matrix, the tensile strength and elongation at break of TPE/MCPAPP improved to 12.7 MPa and 437%. Moreover, the Retention rate of elongation at break for TPE/MCPAPP composite reached 66.5%, significantly higher than the pure TPE (22.2%) at 135 °C after aging for 14 d. Compared with pure TPE, the maximum smoke density and the peak heat release rate were reduced by 41.0% and 80.6%. Thus, the core–shell antioxidant strategy gives an excellent approach to obtain high-performance TPE composites.

核壳结构抗氧剂微胶囊焦磷酸哌嗪旨在提高苯乙烯热塑性弹性体复合材料的机械性能、耐老化性和阻燃性。在本研究中，PAPP 用二氧化硅包裹，然后接枝主抗氧化剂 3-(3, 5-di- tert-丁基-4羟基苯基)(AO)用于制备双壳包裹阻燃剂(MCPAPP)。由于MCPAPP与TPE基体相容性良好，TPE/MCPAPP的拉伸强度和断裂伸长率分别提高至12.7 MPa和437%。此外，在135℃老化14d后，TPE/MCPAPP复合材料的断裂伸长率保持率达到66.5%，显着高于纯TPE（22.2%）。与纯TPE相比，最大烟密度和峰值放热率分别降低41.0%和80.6%。因此，核壳抗氧化策略为获得高性能 TPE 复合材料提供了一种极好的方法。