SLOW DYNAMICS OF SEGREGATION IN HYDROGEN-BONDED POLYMER BLENDS

被引：9

作者：

HOBBIE, EK ^{[1
]}

MERKLE, G ^{[1
]}

BAUER, BJ ^{[1
]}

HAN, CC ^{[1
]}

机构：

[1] NIST,GAITHERSBURG,MD 20899

来源：

PHYSICAL REVIEW E | 1995年 / 52卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.52.3256

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Time-resolved small-angle neutron scattering has been used to study the dynamics of phase separation in hydrogen-bonded polymer blends under a variety of shallow-quench conditions. Above a well defined cutoff wave vector q(c)*, the structure factor S(q,t) is described by an exponential or a stretched exponential decay. The early-stage growth rate R (q) appears to change sign precipitously at the cutoff, however, which is not consistent with a linear theory. Below the cutoff, S(q,t) exhibits nonlinear growth with a characteristic time scale t(m)(q), and scales as q(-D)f(t/t(m)) with a scaling exponent D that is often different from the universal value d=3.

引用

页码：3256 / 3259

页数：4

共 36 条

[1]

[Anonymous], 1983, PHASE TRANSITIONS CR

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