THE DIELECTRIC-CONSTANT NEAR THE LIQUID-LIQUID CRITICAL-POINT FOR POLYSTYRENE IN DIETHYL MALONATE

被引:27
作者
TVEEKREM, JL
GREER, SC
JACOBS, DT
机构
[1] UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLLEGE PK,MD 20742
[2] COLL WOOSTER,DEPT PHYS,WOOSTER,OH 44691
关键词
DIELECTRIC PROPERTIES - Measurements - POLYMERS - Solutions;
D O I
10.1021/ma00179a030
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We have measured the dielectric constant as a function of temperature and frequency near the liquid-liquid critical point of a mixture of polystyrene (molecular weight 1. 02 multiplied by 10**5) in diethyl malonate at the critical composition. The range of the frequency was 20 kHz to 1 MHz. For the one-phase region above the critical point, the range of the temperature was 1. 1 multiplied by 10** minus **5 less than t less than 7. 9 multiplied by 10** minus **2. The dielectric constant in the one-phase region near the critical point shows an anomalous increase of about 0. 3% above the 'background' behavior far from the critical point.
引用
收藏
页码:147 / 153
页数:7
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