Premium
Molecular dynamics revealed from frequency dependent heat capacity
Author(s) -
Schick Christoph,
Wurm Andreas,
Merzlyakov Mikhail,
Minakov Alexander,
Marand Hervé
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200103)165:1<83::aid-masy83>3.0.co;2-t
Subject(s) - dynamics (music) , molecular dynamics , materials science , heat capacity , thermodynamics , physics , chemistry , computational chemistry , acoustics
Temperature modulated DSC (TMDSC) measurements at reasonably high frequencies allow for the determination of baseline heat capacity. In this particular case vitrification and devitrification of the rigid amorphous fraction (RAF) can be directly observed. 0.01 Hz seems to be a reasonably high frequency for Bisphenol‐A Polycarbonate (PC). The RAF of PC is established during isothermal crystallization. Devitrification of the RAF seems to be related to the pre‐melting peak. For PC the melting of small crystals between the lamellae is thought to yield the pre‐melting peak.