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THERMODYNAMIC CHARACTERIZATION OF SEGMENTED POLYURETHANES

机译:分段聚氨酯的热力学表征

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摘要

Segmented polyurethanes (SPU), with oligomeric propylene glycole as a soft-chain component, and 4,4'-diphenylmethane diisocyanate extended with ethylene glycole as a stiff-chain component, were characterized by precise heat capacity measurements in the temperature interval 4.2-420 K. Based on the values of the basic thermodynamic quantities derived from the experimental data, it was concluded that incomplete phase separation resulting in formation of a boundary interphase should be regarded as the main source of intrinsic instability of the three-microphase-type morphology of SPU. [References: 21]
机译:通过在4.2-420的温度区间内进行精确的热容测量,表征了以低聚丙二醇为软链组分,以乙二醇为延伸链的4,4'-二苯基甲烷二异氰酸酯的链段聚氨酯(SPU)。 K.根据从实验数据得出的基本热力学量的值,得出的结论是,应将导致边界界面形成的不完全相分离视为界面三相微形态内在不稳定性的主要来源。 SPU。 [参考:21]

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