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Non‐isothermal crystallization kinetics of poly( L ‐lactide)
Author(s) -
Liu Yufei,
Wang Li,
He Yong,
Fan Zhongyong,
Li Suming
Publication year - 2010
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2894
Subject(s) - differential scanning calorimetry , crystallization , activation energy , materials science , kinetics , isothermal process , lactide , polymer chemistry , chemical engineering , thermodynamics , chemistry , copolymer , polymer , composite material , physics , quantum mechanics , engineering
The non‐isothermal crystallization kinetics of poly( L ‐lactide) (PLLA) in comparison with a polylactide stereocopolymer (PLA 98 ) containing 98% L ‐lactyl and 2% D ‐lactyl units were investigated using differential scanning calorimetry to examine the effect of the configurational structure. Avrami, Ozawa and Liu models were applied to describe the crystallization process. The Avrami analysis exhibited two stages in non‐isothermal crystallization, while the Ozawa and Liu models did not successfully describe the crystallization behaviour. The activation energy was calculated with Kissinger's method. The energy barrier was found to be the same for PLLA and PLA 98 with a value of 126 kJ mol −1 . Copyright © 2010 Society of Chemical Industry