期刊
COMPOSITE INTERFACES
卷 20, 期 4, 页码 287-298出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15685543.2013.796753
关键词
single-polymer composites; liquid crystalline polymer; Vectran((R)); mechanical properties
Single-polymer short-fibers composites (SPSFCs) were obtained by including Vectran((R)) fibers in a Vectran((R)) matrix. A thermal annealing treatment was optimized to increase the melting temperature, mechanical properties, and thermal stability of pristine Vectran((R)) fibers, and a two-step process was successfully developed to consolidate SPSFCs containing up to 30wt.% of reinforcement. The composites exhibited a remarkable improvement of the tensile modulus (up to 161%) and a decrease of elongation at break in comparison with the unfilled matrix. A slight decrease of the composites tensile strength was also observed which suggested an investigation of the matrixreinforcement interfacial adhesion. SEM observations evidenced some pull-out phenomena, indicating a poor interfacial adhesion. A plasma surface treatment on the reinforcing fibers was performed in order to increase the interfacial adhesion in the composites. The results showed an increase of almost 180% in the tensile modulus compared with the unfilled matrix and fiber breakage as main fracture mechanism.
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