Holographic Materials Based on Photorefractive Polymers

采用原子转移自由基聚合的方法，以引发剂为引发剂，合成了侧链含有给体-受体π共轭基团(D-π-A)和光导基团的星形聚合物，得到的星形聚合物的液晶态-各向同性相变温度低于相同相对分子质量的线型聚合物。此外，还合成了一种在支化点裂解的新型星形聚合物。估算了可裂解星形聚合物中各高分子链的相对分子质量和摩尔质量分散度。

Star polymers containing of donor-acceptor π-conjugated moieties (D-π-A) and photo-conductive moieties in the side chain were prepared by atom transfer radical polymerization (ATRP) using with initiator multi-initiated sites.Liquid crystalline-isotropic phase transition temperature of the obtained star polymer was lowered than the linear polymer with the same molecular weight. Moreover, a novel star polymer cleaved at the branching point also was synthesized. Molecular weight and molar-mass dispersity of each polymer chain was estimated in the cleavable star polymer.