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首页> 外文期刊>Journal of Applied Polymer Science >CRYSTALLIZATION BEHAVIOR OF A NOVEL POLY(ARYL ETHER KETONE) - PEDEKMK
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CRYSTALLIZATION BEHAVIOR OF A NOVEL POLY(ARYL ETHER KETONE) - PEDEKMK

机译：新型聚（芳族醚酮）的结晶行为-PEDEKMK

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摘要

Isothermal melt and cold crystallization kinetics of PEDEKmK linked by meta-phenyl and biphenyl were investigated by differential scanning calorimetry in two temperature regions. Avrami analysis is used to describe the primary stages of the melt and cold crystallization, with exponent n = 2 and n = 4, respectively. The activation energies are -118 kJ/mol and 510 kJ/mol for crystallization from the melt and the glassy states, respectively. The equilibrium melting point T-m(0) is estimated to be 309 degrees C by using the Hoffman-Weeks approach, which compares favorably with determination from the Thomson-Gibbs method. The lateral and end surface free energies derived from the Lauritzen-Hoffman spherulitic growth rate equation are sigma = 8.45 erg/cm(2) and sigma(e) = 45.17 erg/cm(2), respectively. The work of chain folding q is determined as 3.06 kcal/mol. These observed crystallization characteristics of PEDEKmK are compared with those of the other members of poly(aryl ether ketone) family. (C) 1997 John Wiley & Sons, Inc. [References: 29]
机译：通过差示扫描量热法研究了在两个温度区域内由间苯基和联苯基连接的PEDEKmK的等温熔融和冷结晶动力学。 Avrami分析用于描述熔融和冷结晶的主要阶段，指数分别为n = 2和n = 4。用于从熔融态和玻璃态结晶的活化能分别为-118kJ / mol和510kJ / mol。使用霍夫曼-韦克斯方法估计平衡熔点T-m（0）为309摄氏度，这与Thomson-Gibbs方法的测定结果相比具有优势。从Lauritzen-Hoffman球晶增长率方程得出的横向和端面自由能分别为sigma = 8.45 erg / cm（2）和sigma（e）= 45.17 erg / cm（2）。链折叠功q确定为3.06kcal / mol。将PEDEKmK的这些观察到的结晶特性与聚（芳基醚酮）家族的其他成员的结晶特性进行比较。 （C）1997 John Wiley＆Sons，Inc. [参考：29]

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