ROTATIONAL BROWNIAN-MOVEMENT OF POLY(TETRAFLUOROETHYLENE) COLLOIDS AS STUDIED BY THE CONDUCTANCE STOPPED-FLOW TECHNIQUE

被引:10
作者
OKUBO, T [1 ]
SHIMIZU, T [1 ]
机构
[1] DAIKIN IND LTD,DEPT RES & DEV,SETTSU 566,OSAKA,JAPAN
关键词
D O I
10.1016/0021-9797(90)90313-D
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The rotational relaxation time and rotational diffusion coefficient (Dr) for ellipsoidal colloids of poly(tetrafluoroethylene) in aqueous suspension are determined conveniently and precisely by the conductance stopped-flow technique. The Dr values observed (13-21 s-1) are smaller than those calculated by Perrin's equation (80 s-1). The deviation can be explained by the significant contribution of the Debye-Hückel double-layer thickness (Debye screening length) in the absence of foreign salt. © 1990.
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收藏
页码:300 / 303
页数:4
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