Crystallization of PEO-b-PCL films was shown to be affected by changing the drying (crystallization) temperature and/or which solvent was used to prepare the casting solution. To investigate the solvent effects on isothermal crystallization of the polymer, PEO-b-PCL films were created using three different solvents. Melt films were used as well for comparison. FTIR was used to measure differences in PEO and PCL relevant absorbances. Differing solubility of each block in the chosen solvent will affect the crystallization in these films. Isothermal crystallization temperature affects the crystallization of the copolymer in many ways including if and when one or both blocks crystallize. Using isothermal crystallization data as well as post isothermal cooling to 0 C, sequential block crystallization of PEO5k-b-PCL16.3k and PEO5k-b-PCL18k hypotheses have been supported.

Solvent effects and isothermal crystallization of poly(ethylene oxide)-block-poly(ε-caprolactone)

253rd National Meeting (2017)

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