Premium
Side‐chain liquid‐crystalline polymers with a limonene‐ co ‐methyl methacrylate main chain: Synthesis and characterization of polymers with phenyl benzoate mesogenic groups
Author(s) -
Mishra Garima,
Srivastava A. K.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24130
Subject(s) - thermotropic crystal , polymer , differential scanning calorimetry , materials science , glass transition , polymer chemistry , mesogen , methacrylate , side chain , liquid crystal , polarized light microscopy , methyl methacrylate , chemical engineering , polymerization , composite material , liquid crystalline , optics , physics , optoelectronics , thermodynamics , engineering
A new series of liquid‐crystalline polymers with a polymer backbone of limonene‐ co ‐methyl methacrylate were synthesized and characterized, and the spacer length was taken to be nine methylene units. The chemical structures of the obtained olefinic compound and polymers were confirmed with elemental analysis and proton nuclear magnetic resonance spectroscopy. The thermal behavior and liquid crystallinity of the polymers were characterized with differential scanning calorimetry and polarized optical microscopy. The polymers exhibited thermotropic liquid‐crystalline behavior and displayed a glass‐transition temperature at 48°C. The appearance of the characteristic schlieren texture confirmed the presence of a nematic phase, which was observed under polarized optical microscopy. These liquid‐crystalline polymers exhibited optical activity. A comparison was also made with polyacrylates and polymethacrylate‐based materials. This revealed that the nature of the polymer backbone had a major effect on the liquid‐crystalline properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4595–4600, 2006