乙二醛交联聚乙烯醇与淀粉共混物的研究

Ravindra V. Gadhave, P. Mahanwar, P. Gadekar
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引用次数: 5

摘要

本研究的目的是分析聚乙烯醇(PVA)和淀粉共混物的不同组成。共混物与乙二醛交联以增强其性能。PVA和淀粉的羟基通过缩醛键与乙二醛反应;因此可能发生交联。用DSC和FTIR等多种分析方法观察了乙二醛的交联反应。交联共混物表现出较好的热力学性能。粘度,拉伸剪切强度,铅笔硬度和极限应力的评估,以估计变化由于交联。我们观察到交联与淀粉成正比,因为淀粉羟基很容易反应。交联共混物表现出较好的链间内聚性,从而提高了玻璃化转变温度。这反映在随后拉伸强度性能的提高上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on Various Compositions of Polyvinyl Alcohol and Starch Blends by Cross-Linking with Glyoxal
The aim of this study is to analyze the various compositions of polyvinyl alcohol (PVA) and starch blends. The blends have been cross-linked with glyoxal to enhance its properties. The hydroxyl groups of PVA and starch react with glyoxal via formation of acetal bonds; hence crosslinking could take place. The cross-linking of glyoxal is observed in various analytical methods such as DSC and FTIR. The cross-linked blends showed better thermal and mechanical properties. Viscosity, tensile shear strength, pencil hardness and ultimate stress were evaluated to estimate the changes due to cross-linking. It was observed that the cross-linking is directly proportional to starch, since the starch hydroxyl groups are easily accessible for reacting. The cross-linked blend showed better cohesion between its chains, thereby increasing glass transition temperature. It was reflected in the subsequent increase in tensile strength properties.
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