首页> 外文期刊>Journal of Applied Polymer Science >MOLECULAR TRANSPORT OF ALKANES THROUGH THERMOPLASTIC MISCIBLE BLENDS OF ETHYLENE-PROPYLENE RANDOM COPOLYMER AND ISOTACTIC POLYPROPYLENE
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MOLECULAR TRANSPORT OF ALKANES THROUGH THERMOPLASTIC MISCIBLE BLENDS OF ETHYLENE-PROPYLENE RANDOM COPOLYMER AND ISOTACTIC POLYPROPYLENE

机译:炔烃通过乙烯-丙烯无规共聚物和等规聚丙烯的热塑性可混混物的分子运输

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摘要

A new experimental protocol based on the measurements of sorption (S), desorption (D), resorption (RS), and redesorption (RD) has been used to study the molecular transport of aliphatic alkanes through the miscible blends of an ethylene-propylene random copolymer and an isotactic polypropylene over the temperature interval 25-70 degrees C. Diffusion and activation parameters are evaluated and their dependencies on solvent size, shape, and nature are discussed. Estimated values of the molar mass between chain entanglements, kinetic rate constants, and overshoot index parameters have been influenced by the polymer-solvent interactions. The sorption-diffusion mechanism is found to be of anomalous type. (C) 1995 John Wiley and Sons, Inc. [References: 52]
机译:基于吸附(S),解吸(D),再吸收(RS)和再吸附(RD)的测量值的新实验方案已用于研究脂肪族烷烃通过乙烯-丙烯无规混溶混合物的分子传输共聚物和全同立构聚丙烯在25-70摄氏度的温度范围内。评估了扩散和活化参数,并讨论了它们对溶剂尺寸,形状和性质的依赖性。链缠结之间的摩尔质量,动力学速率常数和过冲指数参数的估计值已受到聚合物-溶剂相互作用的影响。发现吸附-扩散机制是异常类型的。 (C)1995 John Wiley and Sons,Inc. [参考:52]

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