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首页> 外文期刊>Journal of Applied Polymer Science >Class transition temperatures of hydrocarbon blends: Adhesives measured by differential scanning calorimetry and dynamic mechanical analysis
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Class transition temperatures of hydrocarbon blends: Adhesives measured by differential scanning calorimetry and dynamic mechanical analysis

机译：烃共混物的分类转变温度：通过差示扫描量热法和动态力学分析测量的胶粘剂

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摘要

A comparison of calculated and measured glass transition temperatures of a series of three-component hydrocarbon blends was performed. The blends were prepared as mixtures of an elastomer with different proportions of tackifying resin and oil. Glass transition temperature, T-g, was measured by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) at four measurement frequencies. Most of these blends had pressure-sensitive adhesive (PSA) properties, and were used to prepare a series of PSA tapes. The adhesion of the PSA tapes was shown to be strongly dependent on T-g. Tack of PSA tapes was measured at two different temperatures, and shown to be directly correlated to the blend T-g. Several predictive methods for blend T-g that are based on individual component T(g)s were evaluated. The prediction of blend T-g is far more accurate if the individual component T-g values are determined by DMA instead of DSC. In addition, the Gordon-Taylor equation gave a significant improvement on predicted blend T-g when compared to the Fox equation. (C) 2000 John Wiley & Sons, Inc. [References: 15]
机译：进行了一系列三组分烃共混物的玻璃化转变温度的计算值和测量值的比较。将共混物制备为弹性体与不同比例的增粘树脂和油的混合物。通过差示扫描量热法（DSC）和动态力学分析（DMA）在四个测量频率下测量玻璃化转变温度T-g。这些共混物中的大多数具有压敏胶粘剂（PSA）性能，并用于制备一系列PSA胶带。 PSA胶带的粘合力强烈依赖于T-g。在两个不同的温度下测量了PSA胶带的粘性，结果表明它们与掺混物T-g直接相关。评价了基于单个组分T（g）的几种混合T-g预测方法。如果单个组分的T-g值是通过DMA而不是DSC确定的，则对混合物T-g的预测将更加准确。此外，与Fox方程相比，Gordon-Taylor方程对预测的混合T-g进行了重大改进。 （C）2000 John Wiley＆Sons，Inc. [参考：15]

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