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使用电子静电加速器快电子束和钴—60γ射线对耐热高分子聚苯硫醚的辐射效应进行了研究.测定了辐照前后试样的溶解性能、热性能、结晶度和结构的变化.明确了聚苯硫醚在高能辐射作用下交联和降解同时发生,并求得了在真空中辐照:G_(交联)=0.015,G_(断链)=0.030;在空气中辐照:G_(交联)=0.067,G_(断链)=0.15。氧的存在降低了聚苯硫醚的辐射稳定性。辐照后热稳定性有所提高,结晶度略有下降。尽管聚苯硫醚在辐射作用下,交联和降解同时发生,但其G值小,变化微弱。因此,可以认为聚苯硫醚是一种耐热耐辐射的高分子材料。
The radiation effects of heat-resistant polyphenylene sulfide (PPS) were studied by using the electron beam accelerator (EB) and cobalt-60γ radiation.The dissolution, thermal properties, crystallinity and structure of the samples were measured before and after irradiation. Under the action of high energy radiation, the polyphenylene sulfide crosslinked and degraded simultaneously, and the irradiation in vacuum was obtained: G_ (cross-link) = 0.015, G_ (chain scission) = 0.030; irradiation in air: G_ Crosslinking) = 0.067, G_ (chain scission) = 0.15. The presence of oxygen lowers the radiation stability of polyphenylene sulfide. Thermal stability after irradiation increased, the degree of crystallinity decreased slightly. Although polyphenylene sulfide under the action of radiation, crosslinking and degradation occur at the same time, but its G value is small, change is weak. Therefore, polyphenylene sulfide can be considered a heat-resistant and radiation-resistant polymer material.