ON THE OBSERVATION OF A NEW MORPHOLOGY IN POLY(ARYLENE ETHER ETHER KETONE) - A FURTHER EXAMINATION OF THE DOUBLE ENDOTHERMIC BEHAVIOR OF POLY(ARYLENE ETHER ETHER KETONE)

被引:67
作者
MARAND, H
PRASAD, A
机构
[1] Department of Chemistry, National Science Foundation, Science and Technology Center for High Performance Polymer Adhesives and Composites, Virginia Polytechnic Institute, State University, Blacksburg
关键词
D O I
10.1021/ma00032a017
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The morphology of solvent-cast or melt-pressed isothermally crystallized poly(ether ether ketone) (PEEK) films was investigated by polarized optical microscropy as a function of crystallization temperature. For crystallization temperatures below 300-degrees-C, only spherulitic morphologies were present whereas, at higher temperatures, a morphological transition from spherulitic to crystal-aggregate-like structures could be observed during isothermal crystallization. As the crystallization temperature is increased, the content in the second type of structures was observed to increase. The temperature dependence of the relative population in these two morphologies can be qualitatively correlated with that of the double endothermic behavior observed when PEEK is heated above its crystallization temperature. The observation of this new morphology for PEEK cannot be explained in terms of a polymorphic behavior, a degradation process, or a fractionation effect during crystallization. At this point we can only speculate that it may be related to the structure of the amorphous liquid phase from which the crystallinity develops.
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页码:1731 / 1736
页数:6
相关论文
共 19 条
[1]   CRYSTALLIZATION OF POLYFORMALS .2. INFLUENCE OF MOLECULAR-WEIGHT AND TEMPERATURE ON THE MORPHOLOGY AND GROWTH-RATE IN POLY(1,3-DIOXOLANE) [J].
ALAMO, R ;
FATOU, JG ;
GUZMAN, J .
POLYMER, 1982, 23 (03) :379-384
[2]   CRYSTALLIZATION OF POLYDIOXOLAN .3. MICROSCOPY AND DILATOMETRIC ANALYSIS OF THE CRYSTALLIZATION KINETICS [J].
ARCHAMBAULT, P ;
PRUDHOMME, RE .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1980, 18 (01) :35-50
[3]   ON CRYSTALLIZATION PHENOMENA IN PEEK [J].
BASSETT, DC ;
OLLEY, RH ;
ALRAHEIL, IAM .
POLYMER, 1988, 29 (10) :1745-1754
[4]   ON THE INTERPRETATION OF MULTIPLE MELTING PEAKS IN POLY(ETHER ETHER KETONE) [J].
BLUNDELL, DJ .
POLYMER, 1987, 28 (13) :2248-2251
[5]   THE MORPHOLOGY OF POLY(ARYL-ETHER-ETHER-KETONE) [J].
BLUNDELL, DJ ;
OSBORN, BN .
POLYMER, 1983, 24 (08) :953-958
[6]   CRYSTALLIZATION BEHAVIOR OF POLY(ETHERETHERKETONE) [J].
CEBE, P ;
HONG, SD .
POLYMER, 1986, 27 (08) :1183-1192
[7]  
CHANG SS, 1988, POLYM COMMUN, V29, P138
[8]   GLASS-TRANSITION AND MELTING BEHAVIOR OF POLY(OXY-1,4-PHENYLENEOXY-1,4-PHENYLENECARBONYL-1,4-PHENYLENE) [J].
CHENG, SZD ;
CAO, MY ;
WUNDERLICH, B .
MACROMOLECULES, 1986, 19 (07) :1868-1876
[9]   THERMAL-DEGRADATION OF POLY(ARYL-ETHER-ETHER-KETONE) - EXPERIMENTAL EVALUATION OF CROSS-LINKING REACTIONS [J].
DAY, M ;
SALLY, D ;
WILES, DM .
JOURNAL OF APPLIED POLYMER SCIENCE, 1990, 40 (9-10) :1615-1625
[10]   ON THE MOLECULAR-WEIGHT DETERMINATION OF A POLY(ARYL-ETHER-ETHER-KETONE) (PEEK) [J].
DEVAUX, J ;
DELIMOY, D ;
DAOUST, D ;
LEGRAS, R ;
MERCIER, JP ;
STRAZIELLE, C ;
NIELD, E .
POLYMER, 1985, 26 (13) :1994-2000