利用DMA,TEM和SAXS对以聚苯醚(PPO)为硬段、聚对羟基苯乙烯(PHS)为半硬段和聚二甲基硅氧烷(PDMS)为软段的三元多嵌段共聚物(?)PPO-PDMS-PHS(?)_n的形态结构和性能进行了研究.结果表明,(?)PPO-PDMS-PHS(?)_n以三种嵌段相容相为连续相,PPO与PHS的相容相和PDMS相为两种分散相,其tanδ随温度变化曲线在-100℃至200℃一直是一很高的平台,并具有优异的力学性能,较好地解决了含有机硅类嵌段共聚物强度低的弱点,同时又保留了嵌段共聚物微相分离的特性. Using DMA, TEM and SAXS for ternary multiblocks with soft segment of polyphenylene oxide (PPO) as hard segment, poly (p - hydroxystyrene) (PHS) as hard segment and polydimethylsiloxane (PDMS) The morphological structure and properties of PPO-PDMS-PHS (?) _n were studied.The results showed that PPO-PDMS-PHS (? PHS compatible phase and PDMS phase are two kinds of disperse phase. The tan δ of the PDMS phase has been a high platform with temperature curve from -100 ℃ to 200 ℃, and has excellent mechanical properties, Block copolymer weakness weakness, while retaining the block copolymer micro-phase separation characteristics.