FORCED RAYLEIGH-SCATTERING STUDY OF DIFFUSION OF BLOCK COPOLYMERS .2. SELF-DIFFUSION OF BLOCK COPOLYMER CHAINS IN LAMELLAR MICRODOMAINS AND DISORDERED MELTS

被引：88

作者：

EHLICH, D ^{[1
]}

TAKENAKA, M ^{[1
]}

HASHIMOTO, T ^{[1
]}

机构：

[1] KYOTO UNIV,DEPT POLYMER CHEM,KYOTO 606,JAPAN

来源：

MACROMOLECULES | 1993年 / 26卷 / 03期

关键词：

D O I：

10.1021/ma00055a014

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Forced Rayleigh scattering (FRS) has been used to measure the diffusion coefficients D of a dye-labeled lamella polystyrene (PS)-polyisoprene (PI) block copolymer (M(n) = 2.1 X 10(4), PS content 42 wt %) in the bulk state. The FRS measurements lead to double-exponential signal decays, the decay constants being grossly proportional to the square of the fringe spacing. We suggest interpreting the signals as originating from a Rouse-like diffusion parallel to the lamella interfaces in lamellae tilted at different angles against the measuring direction. Over the temperature range covered (90 < T < 208 -degrees-C), no drastic change in the behavior of the diffusion coefficient could be observed on crossing the order-disorder transition (ODT) temperature at about 190 -degrees-C.

引用

页码：492 / 498

页数：7

共 27 条

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