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Characterization and radical polymerization of (E‐CE)C/AA mesomorphic solutions
Author(s) -
Jiang S. H.,
Huang Y.
Publication year - 1993
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.1993.070490115
Subject(s) - differential scanning calorimetry , photopolymer , polymerization , materials science , polymer chemistry , radical polymerization , azobisisobutyronitrile , scanning electron microscope , polarized light microscopy , optical microscope , acrylic acid , chemical engineering , copolymer , composite material , polymer , optics , physics , thermodynamics , engineering
Ethyl–cyanoethyl cellulose (E–CE)C/poly (acrylic acid) (PAA) composites were prepared by polymerizing acrylic acid (AA) in (E–CE) C/AA cholesteric liquid crystalline solutions. The morphology and structure and the compatibility of composites prepared in different conditions were studied by small‐angle light scattering (SALS), differential scanning calorimetry (DSC), X‐ray spectrometry, polarizing microscopy, and electron microscopy. Ho‐mogeneous composites with the cholesteric structure could be obtained by photopolymerization. During the photopolymerization, however, the morphology of the liquid crystalline domains became crylindric and the axial direction of the cylindric domain was at an angle of about 45° to the layers of the ordered molecular chains. The polymerization initiated by azobisisobutyronitrile (AIBN) resulted in the phase separation. The morphology of the liquid crystalline domains was maintained although the cholesteric structure of the composite was partly destroyed. © 1993 John Wiley & Sons, Inc.