Effects of Side Chains with Similar Lengths and Different Structures of Polyimides on Liquid Crystal Alignment Behavior

Polyimides(PI) with different side chains in structure were synthesized by copolycondensation of pyromelliticmdianhydride(PMDA) with 3,5-diamino-(4'-methane acid hexyl ester) phenyl-benzamide(C6-PDA),(4-butoxybiphenol)-3', 5'-diaminobenzoate(C4-BBDA) and 3, 5-diamino-benzoic acid decyl ester(C10-DA)...

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Veröffentlicht in:Chinese journal of polymer science 2014-12, Vol.32 (12), p.1610-1619
Hauptverfasser: Xia, Jia-hao, Jiang, Ying, Gong, Shi-ming, Sun, Zhen, Wang, Ying-han
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container_end_page 1619
container_issue 12
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container_title Chinese journal of polymer science
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creator Xia, Jia-hao
Jiang, Ying
Gong, Shi-ming
Sun, Zhen
Wang, Ying-han
description Polyimides(PI) with different side chains in structure were synthesized by copolycondensation of pyromelliticmdianhydride(PMDA) with 3,5-diamino-(4'-methane acid hexyl ester) phenyl-benzamide(C6-PDA),(4-butoxybiphenol)-3', 5'-diaminobenzoate(C4-BBDA) and 3, 5-diamino-benzoic acid decyl ester(C10-DA) named PI-PDA, PI-C4, PI-DA, respectively. The lengths of side chains of PI-PDA and PI-DA are as similar as that of PI-C4. Through the pretilt angle tests it is demonstrated that neither the structure of side chains nor the rubbing process could make an obvious difference on vertical alignment property when the lengths of the side chains are similar, standing at around 1.6 nm. The measurement of surface energy of PI surfaces further proved this result. The result of the X-ray photo-electron spectroscope measurement indicated that the side chains of PIs stretched out from the polymer bulk phase and accumulated on the surface.
doi_str_mv 10.1007/s10118-014-1550-6
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subjects Alignment
Chains (polymeric)
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Esters
Industrial Chemistry/Chemical Engineering
Liquid crystals
Polyimide resins
Polymer Sciences
Rubbing
Surface energy
X-rays
侧链结构
取向行为
氨基苯甲酸
液晶
类似
聚酰亚胺
蛋白酶抑制剂
长度
title Effects of Side Chains with Similar Lengths and Different Structures of Polyimides on Liquid Crystal Alignment Behavior
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