【摘要】：使用3種不同化學(xué)結(jié)構(gòu)的單體材料制備了全息聚合物分散液晶光柵,并從光柵形貌、衍射能力、驅(qū)動特性、聚合物熱穩(wěn)定性4個方面評價了光柵的熱穩(wěn)定性.研究發(fā)現(xiàn),含有剛性結(jié)構(gòu)單體材料體系的光柵形貌、衍射能力等方面在200℃的溫度下沒有明顯變化.表明光柵的熱穩(wěn)定性與單體材料的化學(xué)結(jié)構(gòu)密切相關(guān),單體材料中含有剛性結(jié)構(gòu)有助于光柵熱穩(wěn)定性的提高.利用熱重分析(TGA)對光柵中聚合物材料熱分解溫度進行了測定,并結(jié)合Freeman-Carroll微商法計算出了上述聚合物的分解活化能和分解反應(yīng)級數(shù).結(jié)果發(fā)現(xiàn),含有剛性結(jié)構(gòu)的聚合物材料的熱分解溫度、分解活化能和分解反應(yīng)級數(shù)都高于柔性鏈結(jié)構(gòu)材料,進一步驗證了材料體系中剛性結(jié)構(gòu)的添加有助于提高光柵的熱穩(wěn)定性.
[Abstract]:Holographic polymer dispersed liquid crystal gratings were prepared by using three kinds of monomers with different chemical structures. The thermal stability of the gratings was evaluated from four aspects: grating morphology, diffraction ability, driving characteristics and polymer thermal stability. It is found that there is no obvious change in the grating morphology and diffraction power of the monomers with rigid structure at 200 鈩，

本文編號：2265893