Crystallinity of block copolymer controlled by cyclodextrin |
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Authors: | Vanessa Bertolino Giuseppe Cavallaro Giuseppe Lazzara Stefana Milioto Filippo Parisi |
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Affiliation: | 1.Department of Physics and Chemistry,Università degli Studi di Palermo,Palermo,Italy |
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Abstract: | We report a differential scanning calorimetry study to investigate the effect of cyclodextrins (CD) on the crystallinity of a copolymer. Tetronics was selected as copolymer with star-like shape formed by four polyethylene oxide flanked by four polypropylene oxide blocks linked to ethylenediamine central group. The use of CD with different cavity size was exploited for a block selective inclusion. A model for supramolecular association was considered for a quantitative description of the enthalpy data. The polymer chain incorporation into the CD cavity generates a loss of crystallinity. The stoichiometry of the CD/copolymer aggregates can be tuned by changing the CD cavity size. The investigated systems represent interesting necklace-like supramolecular structures with tunable crystallinity. |
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