화학공학소재연구정보센터
Macromolecules, Vol.31, No.13, 4126-4134, 1998
Heteroaromatic chromophore functionalized epoxy-based nonlinear optical polymers
A series of epoxy-based second-order nonlinear optical (NLO) polymers containing heteroaromatic chromophores have been designed. Precursor polymers were prepared from the polymerization between the diglycidyl ether of Bisphenol A and aniline or 4-(2-thienyl)aniline. The precursor polymers were postfunctionalized by an ate-coupling reaction as well as tricyanovinylation to form a series of NLO polymers containing heteroaromatic chromophores. We have extended and established the versatility of our earlier reported postmodification strategy to include various heteroaromatic chromophores in the polymers at the final stage of synthesis. The correlation between different heteroaromatic chromophore structures and the NLO properties of the polymers was extensively studied during this work. Polymers containing heteroaromatic chromophores exhibit improved temporal stability and enhanced NLO activity. The d(33) value of 80 pm/V at 1.550 mu m was observed for a representative polymer of the class containing 2-(4-aminophenyl)-(5-tricyanovinyl)thiophene chromophores. NLO properties of the poled polymers exhibit long-term stability at 80 degrees C.