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Specific physical and chemical properties of two modifications of poly(N-vinylcaprolcatam)

机译:聚(N-乙烯基己内酰胺催化剂)的两种修饰的特定物理和化学性质

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Two modifications of poly(N-vinylcaprolactam)-PVCL25 and PVCL40 (drying of a PVCL solution at 25 and 40A degrees D, respectively)-as powdered films and their solutions were systematically investigated for the first time. Powders were studied by X-ray diffraction, IR spectroscopy, scanning electron microscopy, low-temperature krypton adsorption, and differential scanning calorimetry. Solutions were studied by smallangle X-ray scattering and dynamic light scattering. It was demonstrated that powders of PVCL25 and PVCL40 differ in the characteristics of the sub- and microstructure and in the water content and the solutions differ in the particle size. The relationships between the characteristics of the systems in the solid and liquid state and between the hydrodynamic diameter of PVCL particles in solution and their coagulation time were found.
机译:首次系统地研究了聚(N-乙烯基己内酰胺)-PVCL25和PVCL40的两种改性形式(分别在25和40A度D下干燥PVCL溶液)和它们的溶液。通过X射线衍射,IR光谱,扫描电子显微镜,低温k吸附和差示扫描量热法研究粉末。通过小角X射线散射和动态光散射研究了溶液。结果表明,PVCL25和PVCL40的粉末在亚结构和微观结构的特性以及水含量和溶液的粒径方面都不同。发现了系统在固态和液态状态下的特性与溶液中PVCL颗粒的流体动力学直径与凝聚时间之间的关系。

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