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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:42 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Polymer Physics
Title:
Isothermal crystallization of polymers
Authors:
Emil BARNA(1), Catalin BERLIC(1), Valentin BARNA(1), Eduard GATIN(1,2)
Affiliation:
1)University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania
2)"Carol Davila" University of Medicine and Pharmacy, Faculty of Dental Medicine, Bucharest, Romania
E-mail
barnavalentin@yahoo.com
Keywords:
isothermal crystallization, polymers, degree of crystallization, polarized light
Abstract:
Isothermal crystallization of polymers is a well-known subject, theoretically and experimentally widely studied. However, the investigation have to made face to two problems: the experiments confirm the theory only for linear polymers under 2D conditions (thin films) and the fact that, after the melt-solid transition, two phases are found: crystalline and amorphous. However, the acceptance of the biphasic model is a forced hypothesis: due to the secondary crystallization process, experimentally confirmed and which can significantly increase the degree of crystallization. In this work, we proposed the use of a multiparametric method to confirm the above mentioned steps and, as an experimental method, we used the transmission of polarized light which confirmed our theory.
Acknowledgement:
The research activities were supported from the RO PN-II-RU-TE-2014-2412 grant
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