scholarly journals Application of the Thermorheologically Complex Nonlinear Adam-Gibbs Model for the Glass Transition to Molecular Motion in Hydrated Proteins

2006 ◽  
Vol 91 (3) ◽  
pp. 993-995 ◽  
Author(s):  
Ian M. Hodge
Keyword(s):  
Glass Transition ◽  
Molecular Motion ◽  
Hydrated Proteins ◽  
Gibbs Model

Nanocomposite Epoxy Resin for SiC Module

2011 ◽  
Vol 2011 (HITEN) ◽  
pp. 000196-000200 ◽  
Author(s):  
Kenji Okamoto ◽  
Yuji Takematsu ◽  
Miyako Hitomi ◽  
Yoshinari Ikeda ◽  
Yoshikazu Takahashi
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Resin ◽  
Molecular Motion ◽  
Experimental Results ◽  
Power Module ◽  
Operation Temperature ◽  
Thermal Stability Of

There is a demand to improve the thermal stability of epoxy molding resins used in the power module of SiC power chips operating at temperatures of 200°C or more. This paper describes a technique for increasing the thermal stability of the resin by decreasing molecular motion through the addition of nanofiller. The experimental results showed that the glass transition temperature (Tg) of the epoxy resin increased by approximately 30°C when the silica nanofiller was added. The epoxy resin added nanofiller was investigated in order to achieve the operation temperature 200°C of power module.

A broad glass transition in hydrated proteins

2010 ◽  
Vol 1804 (1) ◽  
pp. 15-19 ◽  
Author(s):  
S. Khodadadi ◽  
A. Malkovskiy ◽  
A. Kisliuk ◽  
A.P. Sokolov
Keyword(s):  
Glass Transition ◽  
Hydrated Proteins

Chemistry of aromatic polythioesters and polydithioesters

2015 ◽  
Vol 6 (16) ◽  
pp. 3131-3142 ◽  
Author(s):  
Daisuke Abe ◽  
Yuichiro Fukuda ◽  
Yuji Sasanuma
Keyword(s):  
Thermal Decomposition ◽  
Glass Transition ◽  
Molecular Motion ◽  
Thermal Transition

Aromatic polythioesters and polydithioesters with different numbers of methylene units have been synthesized and characterized in terms of solubility, crystallinity, glass transition, melting, thermal decomposition, molecular motion, and thermal transition.

The Use of Stable Free Radicals to Determine Motion in Polymeric Systems

1975 ◽  
Vol 48 (5) ◽  
pp. 1078-1089 ◽  
Author(s):  
Wilmer G. Miller ◽  
Zorica Veksli
Keyword(s):  
Glass Transition ◽  
Free Radicals ◽  
Diffusion Coefficients ◽  
Molecular Motion ◽  
Translational Diffusion ◽  
Glassy Polymers ◽  
Spin Labels ◽  
Polymeric Systems ◽  
Stable Free Radicals ◽  
Stable Nitroxide

Abstract The application of thermally and chemically stable nitroxide free radicals to a variety of motional problems in polymeric systems has been investigated. Solvents do not cause significant motion in glassy polymers until the glass transition is lowered to the temperature of measurement. With nonsolvents the results depend on the nature of the sample preparation as well as on the polymer-solvent pair. Molecular motion at the surface of a polymer immersed in a nonsolvent was investigated by means of surface-labeled latex spheres. The application of nitroxides as spin labels to the measurement of translational diffusion coefficients is explored and discussed. Finally, the application of the technique to adsorption and motion of surfactants and polymers onto surfaces is reported.

Glassy Crystals VI. Nitrogen-14 Quadrupole Resonance in Glassy Crystalline Thiazole

1986 ◽  
Vol 41 (1-2) ◽  
pp. 348-352 ◽  
Author(s):  
Catherine Bessada ◽  
Alain H. Fuchs ◽  
Alain Péneau ◽  
Henri Szwarc
Keyword(s):  
Phase Transition ◽  
Relaxation Time ◽  
Glass Transition ◽  
Molecular Motion ◽  
Quadrupole Resonance ◽  
Temperature Dependences ◽  
Crystal Phase Transition ◽  
Nuclear Quadrupole ◽  
Glassy Crystals ◽  
Large Amplitude Motion

Crystalline thiazole has been studied by nitrogen-14 nuclear quadrupole resonance in the 77 - 206 K temperature interval that contains a glass transition at 174 K. The temperature dependences of the relaxation time T1 , of the frequencies and the amplitudes of the NQR signals have been determined for lines ν+ and ν-. No crystal-crystal phase transition has been observed, so that the glass transition at T'g can be observed on heating and on cooling. The T1 measurements have shown the existence of a large-amplitude motion which is different from that which is “frozen” at T'g: it corresponds to a secondary relaxation process which is still active in the glassy crystalline phase. Further studies will attempt to assign it to a definite molecular motion.

Sign in / Sign up

Export Citation Format

Share Document