Enthalpy relaxation in glassy polystyrenes: 2

✍ Scribed by A. Brunacci; J.M.G. Cowie; R. Ferguson; I.J. McEwen

• Book ID: 104164578
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 764 KB
• Volume: 38
• Category: Article
• ISSN: 0032-3861
• DOI: 10.1016/s0032-3861(96)00895-6

✦ Synopsis

The changes in enthalpy (AH,) between the experimental glass and the fully relaxed glass for two polystyrene samples of different molar masses have been estimated using the Cowie-Ferguson approach. These were then compared with the change predicted by a simple two-state conformational energy expression for the specific heat increment at constant volume. Comments on the nature of allowed motions in the glass are made.