| 초록 |
Hydroxyapatite(HAp) is an excellent biocompatible and bioactive ceramic, and is the major component of bone. However, the mechanical properties of HAp is rather poor and it has limited applications. In this study, polyurethane was synthesized from PLLA to increase the mechanical properties of HAp, and was used as the matrix of the composites. To improve toughness, hydrophilicity, and the interfacial bonding with HAp of poly(l-lactide)urethane, isocyanate terminated PEG was added to the ceramic/polymer mixture. The PEG-NCO reacted with poly(l-lactide)urethane through the allophanate formation and then it yielded crosslinked and branched structures. Mechanical properties, thermal properties and morphological changes of composites having different HAp and PEG contents were investigated. Hydrolysis behavior and hydrophilicity were also examined. |
