Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (4): 635.

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Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene

LI Min, ZHOU En-Le, XU Ji-Ping

Polymer Physics Laboratory of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022

Received:1994-05-17 Revised:1994-09-27 Online:1995-04-24 Published:1995-04-24

Abstract

Abstract: The phase behaviour of the side chain liquid crystalline polyacrylates containing pnitro azobenzene was studied by DSC,WAXD and the polarized optical micioscopy. It was shown that nematic phase can be formed for hmopolymer HP₆,no LC phase can be observed for HP₃and HP₄; whereas smectic S_Adphase can be obtained for P_nwhen n was equal to 3,4, 6,8. The unique phase behaviour of the copolymers P_nwas due to the existence of Hbond between-COOH and-NO₂which has been confirmed by FTIR. The molecular arrangement of the copolymers in their LCstates was proposed from the results of WAXD and FTIR.

Key words: Side chain liquid crystalline polymers, Polyacrylate, p-Nitro azobenzene

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LI Min, ZHOU En-Le, XU Ji-Ping. Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene[J]. Chem. J. Chinese Universities, 1995, 16(4): 635.

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Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene

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