Certain polyacetylenes exhibit reversible color changes at transition temperatures in the range -180.degree. to 220.degree. C., wherein the thermochromic cycles can be repeated many times with no apparent degradation and little change in spectroscopic properties. These thermochromic polyacetylenes are useful in temperature-indicator and indicia-display device applications. A process for laser-beam recording of images is described employing a thermochromic polyacetylene, in which the hysteresis properties of the polyacetylene can be suitably altered allowing for selectively storing or erasing the formed image.
某些聚
乙炔在-180℃至220℃的转变温度范围内表现出可逆的颜色变化,其中热致变色循环可以重复多次,且没有明显的降解和光谱性质的变化。这些热致变色聚
乙炔在温度指示器和标志显示装置应用中非常有用。本文描述了一种使用热致变色聚
乙炔进行激光束图像记录的过程,其中聚
乙炔的滞后性能可以适当改变,从而允许选择性地存储或删除所形成的图像。