Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 72, Issue 6, Pages 649-655Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2012.01.008
Keywords
Polymer-matrix composites; Mechanical properties; Thermal properties; Flame retardance
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Funding
- National Science Foundation of China [50933005]
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A novel phosphorus-containing thermotropic liquid crystalline copolyester with aromatic ether moiety (TLCP-AE) was used to prepare the in situ composites of poly(ethylene terephthalate) (PET)/liquid crystalline polymer. The morphological structure and properties of PET/TLCP-AE in situ composites were investigated using scanning electron microscopy (SEM), capillary rheometer, tensile tests, limiting oxygen index tests (LOI), cone calorimeter and thermogravimetric analysis (TGA). The rheological measurements show that the viscosity ratio of TLCP-AE to PET at 260 degrees C is less than 1, which meets a precondition for TLCP-AE to form fibrils in PET matrix during processing. The mechanical, LOI and cone tests prove that TLCP-AE can improve the mechanical properties and flame retardancy of PET synchronously. Moreover, TGA results exhibit that the initial decomposition temperatures and the final residues of PET/TLCP-AE composites increase with increasing TLCP-AE content. (C) 2012 Elsevier Ltd. All rights reserved.
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