Premium
Synthesis, characterization and properties of liquid crystalline bismaleimides containing phenylbenzoate mesogens and polymethylenic spacers
Author(s) -
KallalBartolomeo Kémira,
Milano JeanClaude,
Vernet JeanLouis,
Gallot Bernard
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20001101)201:17<2276::aid-macp2276>3.0.co;2-z
Subject(s) - mesogen , materials science , characterization (materials science) , phase (matter) , methylene , liquid crystalline , liquid crystal , polymer chemistry , isothermal process , isotropy , organic chemistry , chemistry , nanotechnology , thermodynamics , optoelectronics , physics , quantum mechanics
This paper describes the synthesis and characterization of four bismaleimides containing a phenylbenzoate mesogenic group and differing by the length of the polymethylenic spacers. They were prepared by reacting 4‐maleimidobenzoyl chloride with diphenols containing methylene bridges. The cured resins are stable up to 380°C in air. Smectic liquid crystalline behavior was observed in those materials. Two of them could be crosslinked in either smectic or isotropic phase. We have also found that the degree of cure can affect the formation of a liquid crystalline phase. Isothermal cure of initially isotropic material can form a material that exhibits a liquid crystalline phase.