Variation of the Effective Activation Energy Throughout the Glass Transition | Zendy

Vyazovkin Sergey | Zendy; Sbirrazzuoli Nicolas | Zendy; Dranca Ion | Zendy

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Variation of the Effective Activation Energy Throughout the Glass Transition

Author(s) -

Vyazovkin Sergey,

Sbirrazzuoli Nicolas,

Dranca Ion

Publication year - 2004

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200400268

Subject(s) - activation energy , polystyrene , glass transition , materials science , polymer , ethylene oxide , poly ethylene , boron , ethylene , polymer chemistry , chemistry , analytical chemistry (journal) , composite material , catalysis , organic chemistry , copolymer

Summary: An advanced isoconversional method has been applied to determine the effective activation energies ( E ) for the glass transition in polystyrene (PS), poly(ethylene terephthalate) (PET), and boron oxide (B 2 O 3 ). The values of E decrease from 280 to 120 kJ · mol −1 in PS, from 1 270 to 550 kJ mol −1 in PET, and from 290 to 200 kJ mol −1 in B 2 O 3 . It is suggested that a significant variation in E should be observed for the fragile glasses that typically include polymers.Variation in the effective activation energy of PS, PET, and B 2 O 3 with temperature.

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