【摘要】 合成了一种含双偶氮发色团侧基的线型聚氨酯及一种由分散红 - 19与已二异氰酸酯反应生成的线型聚氨酯 ,玻璃化温度依次为 154℃及 163℃。前者的二阶非线性光学系数高达 8× 10 -7esu,室温放置 3个月序参数仍保持初值的 98% ;后者的极化膜较分散红- 19与甲苯二异氰酸酯反应得到的聚氨酯的取向稳定性好 ,12 0℃放置 4 0 0多小时序参数保持 95%以上更多还原

【Abstract】 The linear type polyurethane with azo azo chromophore side groups and from Dispersed Red 19 and 1,6 hexamethylene di isocyanate were synthesized.The former polyurethane posseses second order nonlinear optical (NLO) coefficient about 8×10 -7 esu and keeps 98% of it after 3 months at room temperature. The latter polyurethane showes more stable NLO property than that prepared from TDF and DR and keeps 95% NLO property even at 120℃ for more than 400h.更多还原