FEP/PPS共混涂层的热学行为及相结构分析
Polymer Materials Science & Engineering(2010)
Abstract
采用差示扫描量热法(DSC)及热重分析法(TG)研究了聚全氟乙丙烯/聚苯硫醚(FEP/PPS)共混涂层的热学行为,用X射线衍射仪(XRD)测定了其相结构。结果表明,FEP/PPS为一不相容共混体系,在分子水平上是不相容的。在惰性气氛中,FEP/PPS共混涂层在380℃以前热稳定性良好,其热分解包含两个阶段,先是FEP的分解,后是PPS的分解,且第二阶段失重率和测试终止残重随PPS的增加而增加。相分析表明,FEP/PPS共混涂层由晶相及非晶FEP、晶相及非晶PPS和晶相TiO2组成,涂层中PPS的结晶度与涂料粉末相比有大幅降低,是由于涂层制备过程对PPS熔融结晶行为的影响所致。
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Key words
FEP/PPS blending coating,Phase structure,Thermal properties
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