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Reversible local melting in polymer crystals
Author(s) -
Okazaki Iwao,
Wunderlich Bernhard
Publication year - 1997
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.1997.030180407
Subject(s) - differential scanning calorimetry , nucleation , materials science , recrystallization (geology) , isothermal process , polymer , melting temperature , poly ethylene , atmospheric temperature range , melting point depression , melting point , thermodynamics , ethylene , polymer chemistry , composite material , chemistry , organic chemistry , paleontology , catalysis , physics , biology
The melting of poly(ethylene terephthalate) is analyzed by quasi‐isothermal, temperature‐modulated differential scanning calorimetry. The measurement is done by sinusoidally changing the temperature in the melting range (± 1.0 K). In the melting range a small portion of the sample melts reversibly. This observation is taken as a direct observation of the reversibility of melting of specific macromolecules as long as they are melting only partially and need no molecular nucleation for recrystallization.