YAN Xingzhong, CHEN Yongli, LIANG Zhaoxi, CAI Zhigang, YANG Peiqin, XU Zhiling, LI Peng. SYNTHESE AND NONLINEAR OPTICAL PROPERTIES OF LINEAR FUNCTIONALIZED POLYURETHANE[J]. Acta Polymerica Sinica, 1996,(6):740-744.
YAN Xingzhong, CHEN Yongli, LIANG Zhaoxi, CAI Zhigang, YANG Peiqin, XU Zhiling, LI Peng. SYNTHESE AND NONLINEAR OPTICAL PROPERTIES OF LINEAR FUNCTIONALIZED POLYURETHANE[J]. Acta Polymerica Sinica, 1996,(6):740-744.DOI:
N′-dihydroxyethyl) amino-4-nitroazobenzene (HANB) has been designed and synthesized.Linear polyurethanes with high second-order nonlinear optical activity were obtained through their reaction with toluene diisocyanate (2
4isomer).The second harmonic generation temperal stability of poled polyurethane films was in the following order at the same temperature: o-CH 3-HANB>HANB>o-OCH 3-HANB≈m Cl HANB
which could be explained by the effect of the free volume of the thermal motion for chromophores and the thermotropic initeraction due to polarizability anisotropy of dipoles in films.