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定向有机玻璃在飞机上使用已有三十多年的历史。迄今为止它的耐热性能表征方法尚未取得统一。有机玻璃的耐热性能一般用热机械方法来研究,如玻璃化温度、软化温度和热变形温度等。但是这类压缩法不适合研究取向聚合物。因为取向的各向异性聚合物的特征热机械曲线很少变化,而取向聚合物的消向应力曲线和材料组分,定向度与取向历史有关。所以,
Oriented Plexiglass has been used in the aircraft more than three decades of history. So far its method of characterization of heat resistance has not yet been unified. Plexiglass heat resistance is generally used thermomechanical methods to study, such as the glass transition temperature, softening temperature and heat distortion temperature. However, this type of compression method is not suitable for the study of oriented polymers. Since the characteristic thermomechanical curves of the oriented anisotropic polymer rarely change, the orientation polymer’s stress relaxation curve and material composition, orientation and orientation history. and so,