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Enhancement of stain‐induced crystallization in polylactide via thermal preannealing
Author(s) -
Na Bing,
Zhu Jie,
Lv Ruihua,
Zhang Peng,
Liu Qingxian
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39993
Subject(s) - crystallization , materials science , glass transition , amorphous solid , annealing (glass) , thermal , composite material , relaxation (psychology) , chemical engineering , polymer , polymer chemistry , crystallography , chemistry , thermodynamics , physics , engineering , psychology , social psychology
Stretching of amorphous polylactide above glass transition temperature can lead to strain‐induced crystallization, which is mainly determined by stretching rate and temperature. This study demonstrates that thermal annealing prior to stretching is alternative to enhance strain‐induced crystallization of a given polylactide at the identical stretching conditions. The local order generated during thermal annealing acts as physical crosslinks to effectively alleviate molecular relaxation and thus facilitates the advent of strain‐induced crystallization. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014 , 131 , 39993.