Cross-linked polyurethane with high thermal stability and low optical loss
Cross-linked polyurethane with high thermal stability and low optical loss
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DOI：
10.1117/12.481033
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发表时间：
2002-08
影响因子：
2.8
通讯作者：
Xuhua Li;Q. Yuan;De-ning Wang;Z. Cao;Q. Shen
中科院分区：
文献类型：
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作者：
Xuhua Li;Q. Yuan;De-ning Wang;Z. Cao;Q. Shen
以分散红19（DR-19）、三乙醇胺和甲苯二异氰酸酯三聚体（TTDI）为原料，合成了一种新型交联二阶非线性光学聚氨酯。由于三聚体具有较高的热稳定性，提高了聚氨酯的交联度和刚性，从而显著提高了聚氨酯的热稳定性。通过“主-客体”的极化方式，聚氨酯薄膜获得了高的极化效率，在832 nm处的电光系数γ33达到了37 pm/V。由于聚氨酯中C-H键的数目密度较低，薄膜的光学质量较好，从而降低了聚氨酯的光传输损耗。
A novel cross-linked second-order nonlinear optical polyurethane was synthesized from disperse red 19 (DR-19), triethanolamine and the trimer (TTDI) of toluene diisocyanate. The thermal stability of the polyurethane was significantly improved because the trimer had high thermal stability and increased the cross-link degree and the rigidity of the polyurethane. The polyurethane obtained high poling efficiency through a novel "host-guest" approach, and the electro-optical coefficient γ33 reached 37 pm/V at 832 nm. The propagation loss of the polyurethane was lowered because the number density of C-H bonds in the polyurethane was low and the films had good optical quality.