ABSTRACT: To analyze the Johari−Goldstein (JG) secondary process, dielectric relaxation measurements were carried out on poly(methyl methacrylate) (PMMA) and poly(thiomethyl meth-acrylate) (PTMA). The latter has a sulfur atom replacing the oxygen in the ester of PMMA, making the pendant group much less polar. This weakens the intensity of the secondary relaxation, enabling facile resolution of the JG and primary structural relaxation peaks. We find that the JG relaxation time of PTMA has a substantially larger activation energy (factor of 2) in the liquid compared to the glassy state. Although deconvolution of the peaks in PMMA is more ambiguous due to the large dielectric strength of its JG relaxation, applying the same analysis leads to a...
Broadband dielectric spectroscopy measurements were performed on glass-forming binary mixtures, comp...
Some examples of recent advances in experiment and theory that have impact on solution of the glass ...
Previous dielectric relaxation measurements of glycerol and propylene carbonate and new results on p...
ABSTRACT: Dielectric spectra were obtained on a low molecular weight poly(methyl methacrylate) (PMMA...
Secondary relaxations with properties closely related to the α-relaxation have fundamental importanc...
ABSTRACT: The Johari-Goldstein (JG) secondary relaxation, presumed to be universal, has never been s...
Secondary relaxations have been classified into two types, depending on whether they are related to ...
ABSTRACT: From high-resolution dielectric spectroscopy measurements on 1,4-polybu-tadiene (1,4-PB), ...
Supercooled liquid and glassy acetylsalicylic acid was studied using dielectric spectroscopy and deu...
Dielectric spectra of several typical molecular glass-formers, showing one or more secondary process...
From dielectric spectroscopy measurements on polyisoprene performed at ambient and elevated pressure...
Dielectric relaxation of a low molecular weight PMMA was measured in both the equilibrium and glassy...
Dielectric relaxation measurements of a typical small molecular glassformer, dipropyleneglycol diben...
The different nature of multiple secondary (beta- and gamma-) relaxations for the glass-formers dipr...
Local segmental relaxation properties of poly(methylmethacrylate) (PMMA) of varying molecular weight...
Broadband dielectric spectroscopy measurements were performed on glass-forming binary mixtures, comp...
Some examples of recent advances in experiment and theory that have impact on solution of the glass ...
Previous dielectric relaxation measurements of glycerol and propylene carbonate and new results on p...
ABSTRACT: Dielectric spectra were obtained on a low molecular weight poly(methyl methacrylate) (PMMA...
Secondary relaxations with properties closely related to the α-relaxation have fundamental importanc...
ABSTRACT: The Johari-Goldstein (JG) secondary relaxation, presumed to be universal, has never been s...
Secondary relaxations have been classified into two types, depending on whether they are related to ...
ABSTRACT: From high-resolution dielectric spectroscopy measurements on 1,4-polybu-tadiene (1,4-PB), ...
Supercooled liquid and glassy acetylsalicylic acid was studied using dielectric spectroscopy and deu...
Dielectric spectra of several typical molecular glass-formers, showing one or more secondary process...
From dielectric spectroscopy measurements on polyisoprene performed at ambient and elevated pressure...
Dielectric relaxation of a low molecular weight PMMA was measured in both the equilibrium and glassy...
Dielectric relaxation measurements of a typical small molecular glassformer, dipropyleneglycol diben...
The different nature of multiple secondary (beta- and gamma-) relaxations for the glass-formers dipr...
Local segmental relaxation properties of poly(methylmethacrylate) (PMMA) of varying molecular weight...
Broadband dielectric spectroscopy measurements were performed on glass-forming binary mixtures, comp...
Some examples of recent advances in experiment and theory that have impact on solution of the glass ...
Previous dielectric relaxation measurements of glycerol and propylene carbonate and new results on p...