Polymeric Dopant Effects of Bent-Core Covalent-Bonded and Hydrogen- Bonded Structures on Banana-Shaped Liquid Crystalline Complexes
نویسندگان
چکیده
Two series of banana-shaped liquid crystalline (LC) H-bonded complexes HPm/CBn (i.e., bent-core H-bonded sidechain homopolymer HP mixed with bent-core covalent-bonded small molecule CB) and CPm/HBn (i.e., bent-core covalent-bonded side-chain homopolymer CP mixed with bent-core H-bonded small molecular complex HB) with various m/n molar ratios were developed. The bent-core covalentand H-bonded structural moieties were homopolymerized in the banana-shaped LC H-bonded complexes HPm/CBn and CPm/HBn, respectively. The influences of m/n molar ratios (polymeric moieties vs. small molecular moieties) on the mesomorphic and electro-optical properties of both banana-shaped LC H-bonded complexes HPm/CBn and CPm/HBn were investigated. The polar smectic phases could be achieved and stabilized by smaller contents of polymeric dopants in banana-shaped LC H-bonded complexes, such as HP1/CB10, HP1/ CB15, CP1/HB10, and CP1/HB15, which possessed tunable spontaneous polarization (Ps) values according to the molar ratios of m/n, that is, lower Ps values obtained in H-bonded complexes HPm/CBn and CPm /HBn with higher ratios of H-bonded moieties (larger m/n molar ratios), respectively. VC 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 764–774, 2010
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