Second-order optical nonlinearity of urethane-urea copolymers: Influence of main-chain structure

被引：6
|
作者：
Tsuchimori, M
Watanabe, O
Ogata, S
Okada, A
机构：
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 1997年 / 36卷 / 9A期
关键词：
urethane-urea copolymer; polyurethane; main-chain structure; corona poling; second-harmonic generation; poling temperature; temporal stability;
D O I：
10.1143/JJAP.36.5518
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Urethane-urea copolymers with different main-chain structures have been synthesized, and their nonlinear optical (NLO) properties compared. The glass transition temperatures (T-g) depended on their main-chain structures. The optimum poling temperature of each copolymer was 45 degrees C higher than its T-g, indicating the existence of forces preventing the disordering of poled NLO groups. The observed temporal behavior of d(33) at 100 degrees C indicates that introducing urea groups into a polyurethane main chain can increase the temporal stability of the polyurethane without improving the stiffness of the main chain.
引用
收藏
页码：5518 / 5522
页数：5
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