Thermotropic liquid crystalline polymers—22. Optical properties and structure of some cholesteric copolymers
✍ Scribed by Ya.S. Freidzon; N.I. Boiko; V.P. Shibaev; N.A. Platé
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 315 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0014-3057
No coin nor oath required. For personal study only.
✦ Synopsis
Copolymers of the nematogenic monomer, p-(E-acryloyloxycaproyloxy)-p'-methoxyphenylbenzoate, with various cholesterol-containing monomers were synthesized. The copolymers were shown to form mesophases of the cholesteric type. The dependence of the selective reflection of light on copolymer composition was studied. The copolymers with low content of chiral groups form monochromic cholesteric mesophases, with the cholesteric helix pitch being independent of temperature; the helix for copolymers with high content of chiral groups increases its pitch with increase of temperature.
📜 SIMILAR VOLUMES
## Abstract **Summary:** Polyether network polymers with cholesteric superstructure are formed by the photochemically induced cationic copolymerisation of a nematic diepoxide with chiral epoxides. If a cholesteric superstructure is formed or not, depends on the temperature at which the photopolymer
## Abstract The synthesis of three cholesteric monomers and side‐chain liquid‐crystalline polymers was described. The structure–property relationships of monomers IM–IIIM and polymers IP–IIIP were discussed. Their phase behavior and optical properties were investigated by differential scanning calo
Three series of the thermotropic liquid crystalline copoly(imide-ester)s were prepared by direct polycondensation. The first two series of the copoly(imide-ester)s were synthesized from N-(4-carboxyphenyl) trimellitimide with N,N-di( hydroxypropyl) pyromellitic diimide and various aromatic diols. Th