期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 96, 期 1, 页码 7-14出版社
SPRINGER
DOI: 10.1007/s10973-008-9831-3
关键词
dilatometer; expansion probe; glass transition temperature; polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blend; thermomechanical analysis (TMA)
An inherent challenge with polymer blends is the difficulty in resolving the glass transition, T (g), for the smaller mass fraction component. The objective of this work was to determine the practical scanning conditions for identifying the dual T (g)'s for a 75:25 polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blend using a thermomechanical analyzer (TMA). Scanning rates up to 20A degrees C min(-1) using dilatometer and expansion modes were studied. Heating and cooling rates were found to affect both T (g) values but the effects were not simple relationships. T (g) values could either increase or decrease depending on the scanning rate applied. Higher rates resulted in large thermal lags which opened the accuracy of measurements to question. Generally, higher rates tended to display only one T (g) but the duality of T (g)'s can be detected with scanning rates between 0.5 and 5A degrees C min(-1) for both modes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据