Electrooptical‐responsive microsphere with ferroelectric liquid crystalline segments
Electrooptical‐responsive microsphere with ferroelectric liquid crystalline segments
复制标题
具有铁电液晶片段的电光响应微球
DOI：
10.1002/app.1691
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发表时间：
2001
影响因子：
3
通讯作者：
Y. Hatate
中科院分区：
文献类型：
--
作者：
M. Yoshida;Xinghe Fan;Y. Uemura;Y. Hatate
我们合成了侧链同时含有对苯氧基苯甲酸羧酯和(S)-(-)-2-甲基丁酯作为介晶基团的铁电液晶单体(4-[4′-(7-octeneloxy)benzoyloxy]benzoate-2-methylbutyester，)。将液晶单体和苯乙烯单体用于制备分散聚合、悬浮聚合或乳液聚合制备的微球基质。在本研究中，我们详细地研究了具有液晶能力的微球的物理化学性质、热响应和电光响应。铁电液晶单体OBBM具有热致液晶能力、两相转变温度和近晶C*织构，这是铁电液晶物质的特征。所制备的微球也具有液晶能力，液晶单体和苯乙烯单体共聚制备的微球向液晶链段的相变温度随苯乙烯单体含量的增加而降低。此外，我们还发现，这些微球在约8V时表现出显著的电光响应。
We synthesized a ferroelectric liquid crystalline monomer (4-[4′-(7-octeneloxy)benzoyloxy]benzoate-2-methylbutyester, OBBM) possessing both carboxyl p-benzolxybenzoate and carboxyl (s)-(-)-2-methylbutylester as a mesogenic group in its side chain. The liquid crystalline and styrene monomers were employed to make matrices of microspheres prepared by dispersion, suspension, or emulsion polymerization. In this study, we investigated, in detail, physicochemical properties, thermal responses, and electrooptical responses of the microspheres possessing liquid crystalline abilities. The ferroelectric liquid crystalline monomer OBBM had a thermotropic liquid crystalline ability, two-phase transition temperatures, and a Smectic C* texture, which is characteristic of ferroelectric liquid crystalline substances. The microspheres prepared also exhibited a liquid crystalline ability, and the phase-transition temperatures toward the liquid crystalline segments into the microspheres prepared by copolymerizing the liquid crystalline and styrene monomers could be decreased with increasing of the styrene monomer. Furthermore, we found that the microspheres remarkably exhibited electrooptical responses at about 8 V. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2490–2499, 2001