Thermal stability of polymers based on vinyl derivatives of silicon

1966 ◽  
Vol 8 (5) ◽  
pp. 976-981 ◽  
Author(s):  
N.S. Nametkin ◽  
N.A. Nechitailo ◽  
S.G. Durgar'yan ◽  
V.S. Khotimskii
Keyword(s):  
Thermal Stability ◽  
Vinyl Derivatives ◽  
Derivatives Of ◽  
Thermal Stability Of

Preparation and Pyrolysis of Stereoisomeric Bromobicyclo[n.1.0]alkanes ( n = 6, 8 , 10)

1987 ◽  
Vol 42 (4) ◽  
pp. 489-494 ◽  
Author(s):  
Eckehard V. Dehmlow ◽  
Roland Kramer
Keyword(s):  
Thermal Stability ◽  
Gas Phase ◽  
Condensed Phase ◽  
Secondary Products ◽  
Gas Phase Reactions ◽  
Stereoselective Reduction ◽  
Derivatives Of ◽  
Thermal Stability Of

Abstract The title compounds la-3c were prepared by stereoselective reduction of the respective dibromides. Pyrolysis gave allylic bromides (8, 9, 11) as primary and dienes (10, 12) as secondary products. Product ratios were independent of the stereochemistry of the starting materials. No differences of the rearrangement rates of the stereoisomers were observed in gas phase reactions of the derivatives of bicyclo[6.1.0]- and bicyclo[8.1.0]alkanes. With the larger bicyclo[10.1.0] derivatives, however, distinct differences in the thermal stability of cis-trans-isomers4c/5c or 2c/3c were found in condensed phase.

Thermal stability of polyamides based on derivatives of bis-(p-aminophenyl) methane

1978 ◽  
Vol 20 (10) ◽  
pp. 2487-2493
Author(s):  
Yu.N. Sazanov ◽  
G.N. Fedorova ◽  
L.M. Shcherbakova ◽  
G.I. Nosova
Keyword(s):  
Thermal Stability ◽  
Derivatives Of ◽  
Thermal Stability Of

Ethoxy and silsesquioxane derivatives of antimony as dopant precursors: unravelling the structure and thermal stability of surface species on SiO2

2017 ◽  
Vol 19 (12) ◽  
pp. 8595-8601 ◽  
Author(s):  
T. Alphazan ◽  
P. Florian ◽  
C. Thieuleux
Keyword(s):  
Thermal Stability ◽  
Solid State Nmr ◽  
Surface Species ◽  
Elemental Analyses ◽  
Sb Doping ◽  
Controlled Preparation ◽  
Non Destructive ◽  
Derivatives Of ◽  
Thermal Stability Of

We report here the controlled preparation of SiO2 supported Sb-(mono)layers and their thorough characterization (in situ IR, solid-state NMR, elemental analyses) for the non-destructive Sb-doping of semiconductors.

scholarly journals LNA units present in [RP-PS]-(DNA#LNA) chimeras enhance the thermal stability of parallel duplexes and triplexes formed with (2′-OMe)-RNA strands

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22370-22376
Author(s):  
Katarzyna Jastrzębska ◽  
Barbara Mikołajczyk ◽  
Piotr Guga
Keyword(s):  
Thermal Stability ◽  
Thermally Stable ◽  
Derivatives Of ◽  
Thermal Stability Of

3′-O-(2-Thio-1,3,2-oxathiaphospholane) derivatives of 5′-O-DMT-LNA-nucleosides were used to prepare P-stereodefined (RP-PS)-DNA#LNA chimeras, which form thermally stable parallel complexes with (2′-OMe)-RNA matrices.

Dying AdS Schwarzschild black hole

2021 ◽  
Vol 36 (27) ◽  
pp. 2150195
Author(s):  
Aloke Kumar Sinha
Keyword(s):  
Thermal Stability ◽  
Black Hole ◽  
Cosmological Constant ◽  
Specific Heat ◽  
Black Hole Mass ◽  
Schwarzschild Black Hole ◽  
Quantum Black Hole ◽  
General Stability ◽  
Derivatives Of ◽  
Thermal Stability Of

The criteria for thermal stability of a most general quantum black hole derived by us appeared in the form of a series of inequalities connecting second-order derivatives of black hole mass with respect to its parameters, which determine the mass of the black hole. These nullify the concept of positivity of specific heat as the sole criteria for thermal stability. Using this most general stability criterion, we prove here that AdS Schwarzschild black holes are no longer stable anywhere in their parameter space if cosmological constant is allowed to vary. We also calculate the fluctuations of both horizon area and cosmological constant of this black hole. We calculate specific heat of it and compare this with Hawking’s prediction.

Oligomers with structural elements of imidazolidinetrione obtained from oxamic acid and oxamide: polyurethane foams modified by structural elements of imidazolidinetrione

2015 ◽  
Vol 35 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Iwona Zarzyka
Keyword(s):  
Thermal Stability ◽  
Polyurethane Foams ◽  
Thermally Stable ◽  
Structural Elements ◽  
Derivatives Of ◽  
Thermal Stability Of

Abstract Hydroxyalkyl derivatives containing oxamidoester and oxamide fragments have been separately obtained using oxamic acid, oxamide and alkylene carbonates. It has been proven that the presence of oxamidoester and oxamide structural fragments in oligomer structures is responsible for the thermal stability of these products. Rigid, thermally stable polyurethane foams were obtained with the use of oligomers with oxamidoestercarbamidoimide, carbamide, oxamidoester and oxamide groups as polyols components. The properties of these foamed materials were compared with each other and with the properties of reference foams. It was found that the polyurethane foams characterized by the best properties were obtained from hydroxypropyl derivatives of oxamide.

Sign in / Sign up

Export Citation Format

Share Document