| 초록 |
Interest toward biodegradable shape-memory polymers has been grown for last few decades because of its potential to biomedical application. Although extensive research concerning biodegradable shape-memory polymer has performed, little is known about the effect of ionomer on biodegradable shape-memory polymer. To extend the field of shape-memory polymer, this present study deals with the characterization of segmented poly(oxyethylene-block-ester) ionomer (PEO-b-Ei). Sulfonated poly(ethylene oxide) (SPEO) as an intermediate ionic monomer was synthesized in the presence of sulfonated dimethyl fumarate (SDMF) by esterification reaction. The resulting polymer was characterized using FT-IR spectroscopy, 1H-NMR spectroscopy, Instron and dynamic mechanical analysis. The resulting polymer demonstrated approximately 90-95% recovery, probably due to the competitive relationship between physical crosslingkage due to the ionic aggregation and crystallization. It suggests that PEG segments with ionic groups play a role as a plasticizer to make the chains feasible to mobile, resulting in lower Ttrans. |
