Evidence for a jacketed nematic polymer
نویسندگان
چکیده
The evidence for a « jacketed » structure at the scale of the chain dimensions m the nematic phase of a « side-on fixed liquid crystal polysiloxane is reported by
منابع مشابه
Small angle neutron scattering experiments on ”side-on fixed” liquid crystal polysiloxanes
Small-angle neutron scattering (SANS) studies clearly demonstrate a reinforcement of the nematic "jacketed" structure as the degree of polymerization decreases for a "sideon fixed" liquid crystal polysiloxane. In addition, we show that the dilution of the mesogenic content in a copolymeric homologous strongly reduces the anisotropy of the global polymer
متن کاملMesogen-jacketed liquid crystalline polymers via stable free radical polymerization
Stable free radical polymerization has been used in the controlled synthesis of poly(2,5-bis[(4butylbenzoyl)oxy]styrene), PBBOS. This “mesogen-jacketed liquid crystalline polymer”, which has mesogenic units attached directly to the backbone in a side-on mode, has been found to exhibit thermotropic liquid crystallinity similar to more conventional main-chain architectures. Stable free radical po...
متن کاملSynthesis and Characterization of Mesogen-Jacketed Liquid- Crystal Polymers Based on 2,5-Bis(4 -alkoxyphenyl)styrene
A series of novel mesogen-jacketed liquid-crystal polymers, poly[2,5-bis(4 alkoxyphenyl)-styrene] (P-n, n 1–11), were prepared via free-radical polymerization of newly synthesized monomers, 2,5-bis(4 -alkoxyphenyl)styrene (M-n, n 1–11). The influence of the alkoxy tail length on the liquid-crystalline behaviors of the monomers and the polymers was investigated with differential scanning calorim...
متن کاملMesogen-jacketed liquid crystalline polymer with flexible dicyclopentyl terephthalate as side group
For the first time the flexible cyclopentyl ring is used to build mesogenic units, and thus a novel mesogen-jacketed liquid crystalline polymer (MJLCP) poly(dicyclopentyl vinylterephthalate) is synthesized. The polymer forms a stable mesophase which changes to an isotropic phase at 2678C. The formation of a stable mesophase may be attributed to the spatial interaction among flexible side groups...
متن کاملPhase Diagram of Nematic Polymer Monolayers with the Onsager Interaction Potential
We present an asymptotic study on the phase diagram of two-dimensional nematic liquid crystal polymer monolayers with the Onsager intermolcular potential. In contrast to the case of MaierSaupe interaction potential where there is only one nematic branch, our analysis reveals that there are infinite many nematic branches in the case of the Onsager interaction potential. An asymptotic expression ...
متن کامل