Fluorescent ferroelectric liquid crystalline copolyacrylates
作者:
Alexander Beer,
Günter Scherowsky,
Hywel Owen,
Harry Coles,
期刊:
Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 19,
issue 5
页码: 565-572
ISSN:0267-8292
年代: 1995
DOI:10.1080/02678299508031069
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Fluorescent liquid crystalline side chain polymers were synthesized by copolymerization of a ferroelectric monomer and 5 per cent of various blue fluorescent naphthalic imide dye comonomers. Those copolymers were characterized by DSC, X-ray, GPC and optical microscopy. In favourable cases, fast switching fluorescent ferroelectric polymers resulted, exhibiting high tilt angles (up to ∼ 34°) and spontaneous polarization values (up to ∼ 115 nC cm−2) in the S*cphase. One fluorescent copolymer shows orthogonal smectic phases exclusively due to the structure of the incorporated fluorescent comonomer. In this case a strong electroclinic effect and high induced tilt angles (12° 10 V μm−1) have been observed in the Saphase. Order parameters,S, of the dye moieties up to 0.64 were measured in the room temperature Sbphase for the copolymers
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