Self-assembled structures in block copolymer blends: SAXS, SANS and TEM study

被引:6
|
作者
Holoubek, Jaroslav
Baldrian, Josef
Lal, Jyotsana
机构
[1] Acad Sci Czech Republ, Inst Macromol Chem, Prague, Czech Republic
[2] Argonne Natl Lab, Argonne, IL 60439 USA
关键词
block-copolymer blends; diblock copolymers; neutron scattering; self-assembly; SAXS;
D O I
10.1002/macp.200600419
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Phenomena associated with the order-disorder transition, microdomain morphology and phase behavior of a deuterated block copolymer (BCP) blend I/II (where I is dPS-block-dPMMA and II is dPS-block-PI) were studied by SAXS, SANS and TEM. The studied, almost symmetric, copolymers differ essentially in microdomain morphology. One of them (I) is in disordered microdomain state, while the other (II) displays lamellar morphology at ordinary temperatures. Self-assembled structures in blends were investigated as a function of concentration of the added microphase-separated copolymer and temperature. The ODT positions were located in all the blends, the position of ODT depending only slightly on the concentration of the ordered copolymer. A systematic increase in long period D of the lamellar phase is observed with the growing content of the disordered copolymer. The evaluation of TEM shows the gradual diminishing of macrophase separated regions of disordered copolymer I with growing content of the lamellar copolymer II.
引用
收藏
页码:739 / 746
页数:8
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