含有机硅三元多嵌段共聚物的研究5.含有机硅三元多嵌段共聚物的形态结构

Morphology of Segmented Ternary Copolymers Containing PDMS

利用ＤＭＡ，ＴＥＭ和ＳＡＸＳ对ＰＳＦ－ＰＤＭＳ－ＰＨＳｎ，ＰＳＦ－ＰＤＭＳ－ＰＨＥｎ，ＰＰＯ－ＰＤＭＳ－ＰＨＳｎ和ＰＨＳ－ＰＤＭＳ－ＰＢＥｎ四种三元多嵌段共聚物的形态结构进行了研究，结果表明，不同三元多嵌段共聚物中三种链段的相互作用情况不同，其动态力学性能和形态结构有很大差异，并与嵌段共聚物微相分离的几种基本形态不同，特别是通过ＴＥＭ在ＰＳＦ－ＰＤＭＳ－ＰＨＳｎ和ＰＰＯ－ＰＤＭＳ－ＰＨＳｎ中观察到清晰的互容界面相。

The morphological structures of four segmented ternary copolymers containing PDMS, i. e., PSF-PDMS-PHS n ,PSF-PDMS-PHE n , PPO-PDMS-PHS n and PHS-PDMS-PBE n ,were studied by using DMA, TEM and SAXS techniques. The results indicate that the dynamic mechanical properties and the morphological structures of these different segmented ternary copolymers are very much different , which are dependent on the different interactions among the three different segments, while the morphological structures have no similarity to the basic microphase separation morphology of block copolymers at all, especially that compatible interface was clearly seen when PSF-PDMS-PHS n and PPO-PDMS-PHS n were observed under TEM.