Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis
Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis
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DOI：
10.1016/j.polymer.2012.08.055
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发表时间：
2012-10-12
期刊：
影响因子：
4.6
通讯作者：
Ryu, Du Yeol
中科院分区：
文献类型：
--
作者：
Ahn, Hyungju;Lee, Yonghoon;Ryu, Du Yeol
我们提出了微区扩展和过渡行为的聚苯乙烯-b-聚（甲基丙烯酸甲酯）（PS-b-PMMA）/PS均聚物的二元共混物使用小角X射线散射（SAXS）分析，其中PS分子量（或链长）与链长比（α）为0.3，1，和2相对于PS-b-PMMA的PS嵌段长度变化。通过加入PS均聚物的d-间距和有序无序转变（ODT）的PS分子量显着的影响。与PS-b-PMMA中d-间距随温度升高而典型减小相反，PS-b-PMMA/PS均聚物的d-间距表现出不寻常的行为;具体地说，它随着较短的α-PS链的增加而增加。
We present the microdomain expansion and transition behavior of binary blends of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA)/PS homopolymers using small-angle X-ray scattering (SAXS) analysis, where the PS molecular weight (or chain length) was varied with chain length ratios (alpha) of 0.3, 1, and 2 with respect to the PS block length of the PS-b-PMMA. The d-spacing and order-to-disorder transition (ODT) by addition of PS homopolymers were significantly influenced by the PS molecular weight. In contrast to the typical decrease in d-spacing with increasing temperature in PS-b-PMMA, the d-spacing for PS-b-PMMA/PS homopolymers showed unusual behavior; specifically, it increased for shorter PS chains of alpha