Results 51 to 60 of about 866 (174)

Evaluation of Sodium Naproxen Hydrated Forms by Isoconversional Analysis [PDF]

Scientia Pharmaceutica, 2010
Sodium naproxen (SN) exists in an anhydrous form and in four different hydrated forms: one monohydrate (MSN), two dehydrates (DSN and CSN) and one tetrahydrate (TSN). [...]
openaire   +2 more sources

Thermo‐Oxidative Stability of Materials: Assessment and Predictions

Chemistry–Methods, Volume 6, Issue 3, March 2026.
The article summarizes long‐term stability predictions based on non‐Arrhenian extrapolation of fast high‐temperature thermoanalytical measurements. The theory is applicable for the lifetime estimation of objects made of plastics and other organic materials which can be employed in the conservation of plastic artifacts.
Peter Šimon, Tibor Dubaj, Zuzana Cibulková   +2 more
wiley   +1 more source

Isoconversional methods of thermal analysis yield activation energies that lack physical meaning for Turnbull-Fisher kinetics: Case study of crystallization of piperine from the melt

Chemical Thermodynamics and Thermal Analysis
Differential scanning calorimetry (DSC) is a useful tool for studying the nucleation rate-limited kinetics of crystallization from the melt. However, applying popular isoconversional methods of thermal analysis to such calorimetric data often yields ...
Peter J. Skrdla, Peter Šimon
doaj   +1 more source

Lifetime Prediction of Rubber Using the Chemiluminescence Approach and Isoconversional Kinetics

CHIMIA, 2008
A common scepticism towards the application of many materials in art or in conservation-restoration results from the fact that their long-term stability is unknown and difficult to predict.
Fabian Käser, Bertrand Roduit
doaj   +1 more source

The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites [PDF]

Hemijska Industrija, 2012
In this work, the attention was paid at the investigation of montmorillonite dispersion in epoxy/amine systems due to improved final properties of the nanocomposites.
Jovičić Mirjana C., Bera Oskar J., Pavličević Jelena M., Simendić Vesna B., Radičević Radmila Ž.   +4 more
doaj   +1 more source

Critical study of the isoconversional methods of kinetic analysis [PDF]

Journal of Thermal Analysis and Calorimetry, 2008
A critical study of the use of isoconversional methods for the kinetic analysis of non-isothermal data corresponding to processes with either a real or an apparent variation of the activation energy, E, with the reacted fraction, α, has been carried out using for the first time simulated curves.
Criado Luque, José Manuel, Sánchez Jiménez, Pedro Enrique, Pérez Maqueda, Luis Allan   +2 more
openaire   +4 more sources

Cure Kinetics and Chemorheological Modeling of a Transesterification‐Based Epoxy/Anhydride Vitrimer

Journal of Applied Polymer Science, Volume 143, Issue 7, February 15, 2026.
Cure kinetics and chemorheological model predictions of experimental reaction rate and chemoviscosity evolutions. ABSTRACT This study presents the cure kinetics, glass transition temperature (T g ) and chemoviscosity models for an epoxy vitrimer synthesized from DGEBA, methylhexahydrophthalic anhydride (MHHPA), and triethanolamine (TEOA).
Romeo E. Ekperi, Festus I. Anagwu, Alexandros A. Skordos   +2 more
wiley   +1 more source

Investigating Chemical Modifications in Furan‐Based Polyesters Through Experimental and Mathematical Analysis

Macromolecular Materials and Engineering, Volume 311, Issue 1, January 2026.
PTT‐co‐PTG and PTF‐co‐PTG copolyesters were synthesized via melt polycondensation. Phase‐transition analysis exhibited similar glass‐transition temperatures (Tg) for petrochemical and renewable feedstocks. The Gordon–Taylor model best fit experimental Tg across the copolymers composition range, validating its use for copolymer design and property ...
Konrad Walkowiak, Sandra Paszkiewicz, Joanna Aniśko‐Michalak, Marta Safandowska, Artur Rozanski   +4 more
wiley   +1 more source

Thermodynamic and kinetic analyses of high temperature oxidation of 316L stainless steel

Results in Materials
This study investigates the thermodynamic behavior and non-isothermal oxidation kinetics of 316L stainless steel in the temperature range of 1100 K–1373 K, with relevance to the heat-affected zone during welding in oil and gas pipeline applications ...
Mohammad Maroufkhani, Alireza Khodabandeh, Iulian Radu, Elmira Moosavi-Khoonsari, Mohammad Jahazi   +4 more
doaj   +1 more source

Study on CaCO3 as a Catalytic Additive for the Co‐Pyrolysis of Dried Black Liquor and Waste Polyethylene

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study investigated the co‐pyrolysis of dried black liquor solids (BLSs) and waste polyethylene (PE) under an N2 atmosphere, focusing on CaCO3‐assisted product‐distribution changes. Feedstocks were characterized using proximate/ultimate analyses and heating‐value measurements.
Fang-Hsien Wu, Yu-Chieh Huang, Juan M. Coronado   +2 more
wiley   +1 more source