On the properties of large banded spherulites in a maleic anhydride–polyacrylonitrile mixture

We investigate the solidification of a mixture of maleic anhydride and 2% (by wt) polyacrylonitrile as the undercooling is varied. Such mixtures show banded spherulites with band spacings over an order of magnitude larger than any seen before. We show that these large banded spherulites share many o...

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Bibliographic Details
Published in:Journal of crystal growth 2000-02, Vol.209 (4), p.953-962
Main Authors: Degen, Michael M, Costanzino, Nicola, Bechhoefer, John
Format: Article
Language:English
Subjects:
Applied sciences
Banded spherulites
Exact sciences and technology
Maleic anhydride
Organic polymers
Physicochemistry of polymers
Polyacrylonitrile
Properties and characterization
Solidification
Solution and gel properties
Spherulites
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Summary:We investigate the solidification of a mixture of maleic anhydride and 2% (by wt) polyacrylonitrile as the undercooling is varied. Such mixtures show banded spherulites with band spacings over an order of magnitude larger than any seen before. We show that these large banded spherulites share many of the same properties as banded spherulites found in other systems. Our experiments suggest an explanation for the minimum undercooling threshold commonly observed for banded spherulites.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(99)00534-5