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前言定向有机玻璃(拉伸丙烯酸酯塑料)比普通浇注的有机玻璃具有更好的韧性、抗银纹性和抗裂纹扩展能力,用这种材料制成的飞机透明件更耐久和安全,因而被广泛应用。但是定向有机玻璃还其有另外一种特性,即这种受强迫高弹性变形而取向的高聚物当受热到一定的温度时,取向的大分子由于链的热运动发生解取向,产生回缩,材料尺寸失稳,进一步升高温度,板材完全恢复到拉伸前的初始状态,也
Introduction Plexiglas (Tensile Acrylic Plastic) has better toughness, resistance to silver and crack resistance than ordinary cast plexiglass. Aircraft transparent parts made of this material are more durable and safe and are therefore widely used. However, the orientation of organic glass also has another characteristic, that is forced by the high elastic deformation of the orientation of the polymer when heated to a certain temperature, the orientation of the macromolecules due to the chain of thermal kinetic de-orientation, resulting in retraction , Material size instability, and further increase the temperature, the plate completely restored to the original state before stretching, also