Unified isothermal and non-isothermal modelling of neat PEEK crystallization

被引:32
作者
Bessard, Emeline [1 ]
De Almeida, Olivier [1 ]
Bernhart, Gerard [1 ]
机构
[1] Univ Toulouse, ICA, Mines Albi, F-81013 Albi 09, France
关键词
PEEK; Crystallization; Kinetic modelling; Differential scanning calorimetry (DSC); POLY(ETHER ETHER KETONE); CARBON FIBRE/PEEK COMPOSITES; COOLING RATE INFLUENCES; MELTING BEHAVIOR; MACROKINETIC MODELS; HEAT-TRANSFER; KINETICS; POLYMER; AVRAMI; POLY(ETHERETHERKETONE);
D O I
10.1007/s10973-013-3308-8
中图分类号
O414.1 [热力学];
学科分类号
摘要
A differential generalized Avrami's law is used to model crystallization kinetic of PEEK in considering that PEEK crystallization results from the contribution of two distinct mechanisms. The form of this equation allows to predict with good accuracy both isothermal and non-isothermal crystallization kinetics. Nevertheless, isothermal model parameters are not entirely satisfactory for predicting non-isothermal crystallization and the identification of kinetic parameters is needed for both isothermal and non-isothermal cases. The results show that the Avrami exponents and Arrhenius activation energies remain constant for both conditions and therefore suggest that these parameters are only material dependent. On the other hand, the other kinetic parameters depend on the crystallization condition and vary with temperature and/or cooling rate.
引用
收藏
页码:1669 / 1678
页数:10
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