Self-assembly of azobenzene based side-chain liquid crystalline polymer and n-alkyloxybenzoic acids
作者:KUMARASAMY GAYATHRI、SUBRAMANIAN BALAMURUGAN、PALANINATHAN KANNAN
DOI:10.1007/s12039-011-0083-6
日期:2011.5
Liquid crystalline pendant polymeric complexes have been obtained by supramolecular assembly of two mesogenic components namely, poly[4-(10-acryloyloxydecyloxy)-4′- phenylazobenzonitrile] (P10) and 4-alkyloxybenzoic acids (A7-A12). Hydrogen bond formed between carboxylic acid and cyano moiety served as molecular bridge. The polymeric complexes acquitted as undivided liquid crystalline properties exhibited stable and enantiotropic mesophases. The precursor, monomer and polymer were analysed by 1H-NMR and 13C-NMR spectroscopy. The hydrogen bonding interaction in polymer complexes (P10-A7 to P10-A12) was investigated by FT-IR spectroscopy. The thermal behaviours and textural analysis were studied by differential scanning calorimetry and polarized optical microscopy respectively.
通过超分子组装两种介晶成分,即聚[4-(10-丙烯酰氧基癸氧基)-4′-苯基偶氮苯甲腈](P10)和4-烷氧基苯甲酸(A7-A12),制备了液晶吊坠聚合物复合物。羧酸和氰基之间的氢键起到了分子桥的作用。这些聚合物复合物表现出了稳定且外消旋的液晶态。通过对前体、单体和聚合物的1H-NMR和13C-NMR光谱分析进行了分析。通过FT-IR光谱学研究了聚合物复合物(P10-A7到P10-A12)中的氢键相互作用。通过差示扫描量热法和偏振光学显微镜分别研究了热行为和纹理分析。