Crystallinity of block copolymer controlled by cyclodextrin

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 cen...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2018-04, Vol.132 (1), p.191-196
Main Authors: Bertolino, Vanessa, Cavallaro, Giuseppe, Lazzara, Giuseppe, Milioto, Stefana, Parisi, Filippo
Format: Article
Language:English
Subjects:
Analytical Chemistry
Block copolymers
Calorimetry
Chemistry
Chemistry and Materials Science
Copolymers
Crystal structure
Crystallinity
Cyclodextrins
Dextrins
Enthalpy
Ethylenediamine
Ethylenediamines
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polyethylene
Polyethylenes
Polymer Sciences
Polypropylene glycol
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Summary: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.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-6982-8