716 加水分解を受けたβ-TCP/PLLA複合材料の力学的特性に及ぼすひずみ速度の影響(OS1-2 生分解性ポリ乳酸とポリ乳酸系複合材料の変形と破壊)

概要

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Bioactive ceramics/poly-L-lactide (PLLA) composites have been expected as a material for the bone fracture fixations which have more biocompatibility than monolithic PLLA. In this study, β-tricalcium phosphate (β-TCP)/PLLA composites containing three different β-TCP contents and monolithic PLLA specimens were prepared by injection molding to clarif,' the effect of hydrolysis and strain rates on the mechanical properties. These specimens were immersed in phosphate buffered solution, and then tensile tests were performed at the strain rates ranging from 10^<-4> to 10^<-1> [s^<-1>]. In the results of these tests, both β-TCP/PLLA composites and PLLA specimens showed that their modulus have no dependence on the strain rate and their strengths increased with increasing strain rates. After 8 weeks immersion, strength of specimens were decreased slightly.
一般社団法人日本機械学会の論文
2007-10-24