Bending and Compressive Properties of Crystallized TCP/PLLA Composites
Bending and Compressive Properties of Crystallized TCP/PLLA Composites
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DOI：
10.1163/156855109x434694
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发表时间：
2009-01-01
影响因子：
2.9
通讯作者：
Sakamoto, Kazuki
中科院分区：
文献类型：
--
作者：
Kobayashi, Satoshi;Sakamoto, Kazuki
beta-Tricalcium phosphate (beta-TCP) particles reinforced bioresorbable plastics poly-L-lactide (PLLA) composites were prepared by injection molding. The nominal weight ratio of beta-TCP was selected as 5, 10 and 15%. In order to clarify effects of the PLLA crystallinity on the mechanical properties, the specimens were heat treated isothermally. Results of differential scanning calorimetry indicated that the PLLA crystallinity increased with increasing heat treatment temperature. Bending and compressive tests were conducted on the specimen with different beta-TCP contents and crystallinities. The results show that the bending and compressive moduli increased with increasing beta-TCP contents and crystallinity. On the other hand, bending strength decreased with increasing beta-TCP contents. Maximum bending strength was obtained at the heat treatment of 70 degrees C for 24 h, whereas compressive 0.2% proof strength increased with increasing heat treatment temperature. This difference is attributed to the difference in the microscopic damages. (C) Koninklijke Brill NV, Leiden, 2009
