THERMODYNAMIC CHARACTERIZATION OF INTERPENETRATING POLYMER NETWORKS OF POLY(CARBONATE-URETHANE) AND POLY(METHYL METHACRYLATE)

被引:6
|
作者
PRIVALKO, VP [1 ]
AZARENKOV, VP [1 ]
BAIBAK, AV [1 ]
KORSKANOV, VV [1 ]
FRISCH, HL [1 ]
ZHOU, P [1 ]
机构
[1] SUNY ALBANY,DEPT CHEM,ALBANY,NY 12222
关键词
D O I
10.1002/pola.1994.080321403
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Crosslinked poly(methyl methacrylate) and poly(carbonate-urethane) as well as full interpenetrating network on their base (IPN) were characterized by precise heat capacity measurements in the temperature interval 4.2-450 K. As judged by the positive sign of the excess Gibbs free energy in the whole temperature interval above 30 K, the apparently single-phase state of IPN is thermodynamically unstable; however, its kinetic stability is ensured by permanent chamical crosslinks prohibiting the incipient phase separation. (C) 1994 John Wiley & Sons, Inc.
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页码:2625 / 2628
页数:4
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