An analysis of the thermal aging behaviour in high-performance energetic composites through the glass transition temperature

2009 ◽  
Vol 94 (4) ◽  
pp. 664-669 ◽  
Author(s):  
José Luis de la Fuente
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermal Aging ◽  
High Performance ◽  
Energetic Composites

Synthesis and properties of random polysulfone/polyethersulfone copolymers as high-performance polymers

2011 ◽  
Vol 31 (4) ◽  
Author(s):  
Yi-Nan Zhang ◽  
Shu-Ling Zhang ◽  
Yan-Hua Yang ◽  
Hong-Yi Qin ◽  
Dong Jiang
Keyword(s):  
Thermal Stability ◽  
Weight Loss ◽  
Tensile Strength ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Performance ◽  
Excellent Thermal Stability ◽  
Elongation At Break ◽  
High Performance Polymers

Abstract A series of random polysulfone/polyethersulfone (PSF/PES) copolymers were synthesized by the polycondensation of 4,4′-isopropylidenediphenol, 4,4′-dihydroxyldiphenylsulfone, and 4,4′-dichlorodiphenylsulfone in the presence of potassium carbonate. The resulting copolymers displayed similar solubility with PSF and PES. The glass transition temperature and the 5% weight loss temperature of these copolymers varied in the range of 199°C–299°C and 467°C–498°C, respectively, which showed excellent thermal stability. Moreover, the elongation at break of these copolymers was much higher than that of PES, whereas the tensile strength was a little lower.

The Research of the Effect of Single-Walled Carbon Nanotubes on the Properties of Epichlorohydrin Rubber

2019 ◽  
Vol 945 ◽  
pp. 428-432
Author(s):  
E.N. Timofeeva ◽  
Natalia N. Petrova ◽  
K.N. Nikolaeva ◽  
E.S. Kuzmina
Keyword(s):  
Carbon Nanotubes ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Low Temperatures ◽  
High Performance ◽  
Single Walled Carbon Nanotubes ◽  
Elastomeric Materials ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The development of frost-resistant elastomeric materials with high performance characteristics remains one of the topical issues. Solving this issue will significantly improve the reliability of machines and mechanisms operating under extremely low temperatures. The influence of multi-walled carbon nanotubes on the performance properties of epichlorohydrin rubber was investigated. This rubber of unique frost resistance has low glass transition temperature (Tg = -60 °C).

Metal-coordination crosslinked N-polyindoles as recyclable high-performance thermosets and nondestructive detection for their tensile strength and glass transition temperature

2018 ◽  
Vol 54 (23) ◽  
pp. 2906-2909 ◽  
Author(s):  
Guanjun Chang ◽  
Cheng Wang ◽  
Mengqi Du ◽  
Shenye Liu ◽  
Li Yang
Keyword(s):  
Tensile Strength ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Performance ◽  
Polar Solvent ◽  
High Heat ◽  
Metal Coordination ◽  
High Heat Resistance ◽  
High Tensile Strength

Metal coordination crosslinking between stiff N-polyindole chains was constructed, and the crosslinked films exhibited high tensile strength, high heat resistance and excellent polar solvent resistance.

scholarly journals Multifold pressure-induced increase of electric conductivity in LiFe0.75V0.10PO4 glass

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Piotr Baranowski ◽  
Szymon Starzonek ◽  
Aleksandra Drozd-Rzoska ◽  
Sylwester J. Rzoska ◽  
Michal Bockowski ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Transition Metal Oxides ◽  
High Performance ◽  
Iron Phosphate ◽  
Polaron Hopping ◽  
Conductivity Increase ◽  
Before And After ◽  
The Impact

Abstract We investigated the impact of high pressure and high-temperature annealing on lithium-vanadium-iron-phosphate (LiFe0.75V0.10PO4) glass materials, proposed for the use in cathodes for high-performance batteries. The treatment was carried out below the glass transition temperature (Tg ≈ 483 °C) at P = 1 GPa pressure, in an argon atmosphere. It led to the multifold electrical conductivity increase. Broadband dielectric spectroscopy (BDS) measurements before and after the process revealed the strong DC-conductivity increase across the whole studied frequency range by two orders of magnitude. The phenomenon is explained using Mott’s theory of polaron hopping in disordered solids containing transition metal oxides. The pressure evolution of the glass transition temperature and the crystallisation temperature above Tg is shown.

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