| 초록 |
The cryatallization behavior of biodegradable poly (oxyethylene-b-butylene succinate) ionomers was investigated by using 1H NMR, DSC and POM, respectively. Isothermal crystallization kinetics of the polyesters has been analyzed by the Avrami equation. With increasing ionic contents, crystallization rate was decreased and the 2.8-3.9 range of Avrami exponential n indicated that the crystallization mechanism was a heterogeneous nucleation with spherical growth geometry in the crystallization process of POBSis. Besides the normal extinction crosses of PBS, POBS2.0i displays double banded ring patterns with periodic distance spherulite. A basis of shape and texture of the spherulites may strongly depend on influence of ionic group on to the amorphous PEO chain. |
