Journal of the Society of Materials Science, Japan
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
Structural Relaxation of Quasi-Equilibrium Cross-Linked Poly (Methyl Methacrylate) in a High Temperature Glassy State
Toyomitsu WATANABEYukuo NANZAIShigeo HIRUMA
Author information
JOURNAL FREE ACCESS

2004 Volume 53 Issue 12 Pages 1276-1280

Details
Abstract
Structural relaxation in cross-linked poly (methyl methacrylate) (C-PMMA) quite slowly cooled from the rubbery state to a quasi-equilibrium glassy state was studied at a temperature of 10°C less than the, glass transition temperature Tg (Tg-10°C=110°C). Constant-rate mechanical tension test and differential scanning calorimetry (DSC) technique were used for the observation of structural relaxation. At long times of storage at 110°C for quasi-equilibrium C-PMMA, a prominent structural relaxation was found as highly progressive developments of yield stress in the tension test and endothermic peak in the DSC measurement. Imposition of a tensile strain of 0.10 to the slowly cooled specimens induced short times structural relaxation modes. Yet, in spite of the imposition of finite strain, long times relaxation modes were almost the same to that of unstrained quasi-equilibrium C-PMMA specimens.
Content from these authors
© by The Society of Materials Science, Japan
Previous article Next article
feedback
Top