glass transition temperature
Recently Published Documents





2022 ◽  
Francis Owusu ◽  
Martin Tress ◽  
Frank A. Nüesch ◽  
Sandro Lehner ◽  
Dorina M. Opris

Polar polynorbornenes prepared by ring-opening metathesis polymerization show thermally switchable dielectric permittivity. The polymers exhibit a large dielectric relaxation strength and high glass transition temperature.

AIP Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 015207
Qingli Ma ◽  
Yong Wang ◽  
Youlin Gu ◽  
Nanxiang Zhao ◽  
Sheng Luo ◽  

2022 ◽  
Hong Chi ◽  
Guocheng Zhang ◽  
Ning Wang ◽  
Yaoguang Wang ◽  
Tianduo Li ◽  

Glass transition temperature (Tg) is always deteriorated while improving the strength of epoxy resins which inherently suffered from brittleness. Herein, a novel linear polyhedral oligomeric silsesquioxane (POSS)-epoxy nano modifiers is...

2022 ◽  
Vol 92 (2) ◽  
pp. 242
С.А. Гриднев ◽  
Ю.Е. Калинин

High-temperature internal friction in an amorphous CuTi alloy is investigated. Exponential regions with different activation energies are observed on the dependence of internal friction on temperature on both sides of the glass transition temperature. An exponential increase in the background of internal friction with temperature in both sites is associated with the migration of vacancy-like defects in the amorphous structure under the influence of mechanical stresses, while frozen defects of constant concentration migrate to the glass transition temperature. After the transition to a state of thermodynamic equilibrium , the concentration the number of migrating defects increases exponentially. Based on the experimental results of measuring the high-temperature background, estimates of the activation energy of migration and the formation of vacancies of similar defects in the amorphous structure of the alloy under study are made.

Sign in / Sign up

Export Citation Format

Share Document