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Mechanical properties of bio-absorbable PLA/PGA fiber-reinforced composites
Tetsuo Takayama,Youhei Daigaku,Hiroshi Ito,Hideki Takamori 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.10
This study investigated important mechanical properties, the flexural strength and flexural modulus, of polyglycolic acid (PGA) fiberreinforcedpolylactic acid (PLA) composites fabricated by melt-mixing. The flexural strength and flexural modulus were estimated usingthree-point bending tests conducted at 37°C. Both the flexural strength and flexural modulus were increased by PGA fiber reinforcement. Viscoelastic properties were also investigated using dynamic mechanical analysis (DMA) under tensile loading. Results show that PGAfiber, which acts as the nucleate agent of PLA, restrains the molecular chains of PLA. That restraint reduces deformation at the samestress condition, thereby improving the PLA flexural properties.