Thermomechanical Properties and Morphology of Liquid Crystalline Polyurethane/Epoxy Resin Composites

Abstract:

One new kind of epoxy resin toughening agent defined as liquid crystalline polyurethane elastomers (LCPUE) containing mesogenic ester groups and trithylene glycol flexible chain was synthesized and its nematic structure was observed by POM and XRD. The LCPUE was to modify the epoxy resin (E-51). The mechanical properties, fracture surface morphology, and thermal properties of the E-51/LCPUE curing system were systematically investigated. Experimental results revealed that the impact strength of the epoxy resin modified with LCPU is 1.9 times higher than that of the unmodified system, enhanced the thermal decomposition temperature by about 12 °C, and the fracture surfaces all modified systems display tough fracture feature.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 1421-1425
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.1421
• Online since: February 2011
• Authors: Jian Feng Ban, Shao Rong Lu, Dong Guo, Kuo Liu, Chong Xi Luo
• Keywords: Dynamic Mechanical Behaviour, Epoxy Resin (ER), Liquid Crystalline Polyurethane, Toughness

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