An enhanced host-guest electro-optical polymer system using poly(norbornene-dicarboximides) via ROMP

作者：Yu Feng; Spring Andrew M; Li Lu; Qiu Feng; Yamamoto Kazuhiro; Maeda Daisuke; Ozawa Masaaki; Odoi Keisuke; Yokoyama Shiyoshi^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2013, 51(6): 1278-1284.

DOI：10.1002/pola.26505

• electro-optics
• glass transition
• hostguest systems
• living polymerization
• molecular weight distribution
• ROMP

High glass transition temperature poly(N-cyclohexyl-5-norbornene-2,3-dicarboximide)s (NDI)s prepared by ring opening metathesis polymerization yielded polymers with a narrow polydispersity and well-controlled molecular weight materials when using the Grubbs first generation initiator. Polymers produced using the Grubbs second generation initiator could not be controlled easily. By initiator selection it was also possible to synthesize polymers with either 98 or 52% trans microstructures. These materials were employed as electro-optic (EO) polymer hosts for high molecular hyperpolarizability () phenyl vinylene thiophene vinylene bridge chromophores. This chromophore was modified by the incorporation of a tert-butyldiphenylsilane group. The addition was able to further increase its EO coefficient (r33) to reach 93 pm/V in a trans rich poly(NDI) produced by the Grubbs first generation initiator, compared to a benchmark chromophore / polymer combination. We investigated in detail the relationship between polymer microstructure and their absolute molecular weight on forming the best hostguest with the high chromophore. Our results indicate that by utilizing a very simple hostguest system a high r33 can be realized.

• 出版日期2013-3-15