Thermomechanical Properties and Morphology of Liquid Crystalline Polyurethane/Epoxy Resin Composites
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.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
J. F. Ban et al., "Thermomechanical Properties and Morphology of Liquid Crystalline Polyurethane/Epoxy Resin Composites", Advanced Materials Research, Vols. 194-196, pp. 1421-1425, 2011