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Polymers 2016, 8(7), 236; doi:10.3390/polym8070236

Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide

1
Beijing Key Lab of Special Elastomer Composite Materials, College of Materials Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2
College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Joannis K. Kallitsis
Received: 22 April 2016 / Revised: 6 June 2016 / Accepted: 9 June 2016 / Published: 19 July 2016
(This article belongs to the Special Issue Hybrid Polymeric Materials)
View Full-Text   |   Download PDF [5199 KB, uploaded 19 July 2016]   |  

Abstract

Conventional shape memory polymers suffer the drawbacks of low thermal stability, low strength, and low shape recovery speed. In this study, main-chain liquid crystalline polyurethane (LCPU) that contains polar groups was synthesized. Graphene oxide (GO)/LCPU composite was fabricated using the solution casting method. The tensile strength of GO/LCPU was 1.78 times that of neat LCPU. In addition, shape recovery speed was extensively improved. The average recovery rate of sample with 20 wt % GO loading was 9.2°/s, much faster than that of LCPU of 2.6°/s. The enhancement in mechanical property and shape memory behavior could be attributed to the structure of LCPU and GO, which enhanced the interfacial interactions between GO and LCPU. View Full-Text
Keywords: graphene oxide; liquid crystalline polyurethane; composites; shape memory property graphene oxide; liquid crystalline polyurethane; composites; shape memory property
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, Y.; Lian, H.; Hu, Y.; Chang, W.; Cui, X.; Liu, Y. Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide. Polymers 2016, 8, 236.

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