采用先开环聚合后取代的方法合成了聚二苯胺磷腈(PDAP),将PDAP与低密度聚乙烯(LDPE)熔融共混制得复合材料,采用傅立叶变换红外光谱(FT-IR)、广角X射线衍射(WAXD)、热重(TGA)、差示扫描量热(DSC)、动态热机械分析(DMTA)等方法,对PDAP/LDPE共混物的性能进行表征.结果表明,LDPE/PDAP共混物具有比LDPE更高的热稳定性;LDPE/PDAP共混物出现了两个玻璃化转变,相对于纯组分而言发生了偏移;广角X射线衍射表明LDPE/PDAP共混物结晶度相对于LDPE有所降低,同时发现有新的晶型出现,动态热机械分析表明LDPE/PDAP出现了α、β、γ三个明显的转变,并且与PDAP的添加量存在良好的相关性.
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