| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 99 === In this study, we have combined the chemical processing of PLA-diol-2000 into polyurethanes (PUs) in our design of new green materials. PLA-diol-2000 of 1,800 molecular weight was synthesized from 1,4-butanediol and L-lactide through ring-opening polymerization, and was used as the key component of soft segment of PUs. Other common raw materials used in our formulation developments were diol of polyethylene-butylene-adipate (RS-956), polytetramethylene ether glycol (PTMEG), isophorone diisocyanate (IPDI), 1,4-butanediol (1,4-BDO) and 1,4-butanediamine (1,4-BDA).
The suitable process for synthesis of PUs with PLA-diol-2000 was studied, and the characteristics of synthesized PUs containing PLA-diol-2000 were analyzed, including molecular weights, thermal properties and mechanical properties. From this study, we have come up with PUs possessing balanced properties that exhibit excellent biocompatibility and biodegradability. This is achieved by the combination of PLA-diol-2000/PTMEG/RS-956 (in ratio of 1/1/3, respectively) as the soft segment constituents with BDO and BDA (in ratio of 1/1, respectively) as the hard segment ingredients in our formulation. The green materials show great potential for use in the special medical applications.
|
|---|
