CRYSTALLIZATION KINETICS IN RELATION TO POLYMER PROCESSING

被引:35
作者
BRUCATO, V [1 ]
PICCAROLO, S [1 ]
TITOMANLIO, G [1 ]
机构
[1] UNIV SALERNO,DIPARTIMENTO INGN CHIM ALIMENTARE,I-84084 BARONISSI,ITALY
来源
MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA | 1993年 / 68卷
关键词
D O I
10.1002/masy.19930680119
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Phase distribution of quenched samples has been determined by a deconvolution procedure of WAXS spectra in a wide range of cooling rates. The informations collected together with isothermal and DSC results provide a very wide set of data on the crystallization kinetics of polymers relevant which covers conditions encountered in most polymer processing operations. They have been compared with predictions of a non-isothermal crystallization model assuming two independent and parallel crystallization processes competing during solidification. The case of a nucleated Polyamide 6 is described in this work. While amorphous phase increases slowly with cooling rate, alpha-monoclinic phase starts to decrease significantly above cooling rates of a few degrees-C/s whereas gamma-pseudohexagonal phase starts to grow; above cooling rates of 200-degrees-C/s only traces of alpha-form are observed and gamma-phase seems to have reached a plateau. All these features are satisfactorily described by the crystallization kinetics model adopted.
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页码:245 / 255
页数:11
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