Results 61 to 70 of about 4,266 (210)

Strain rate and loading modes in DMTA experiments on ethylene/propylene block copolymers [PDF]

, 2014
A broad experimental programme using Dynamical-Mechanical Thermal Analysis (DMTA) was carried out on ethylene/propylene block copolymers (EPBC). The samples were subjected to frequency scans to evaluate the dependence of stored modulus on frequency ...
Rodríguez, J., Salazar, A., Rico, A., Outón, P. R., Benavente, Rosario   +4 more
core   +1 more source

Polycarbonate Vitrimers and Dynamic Co‐Networks From Epoxide/Carbon Dioxide Copolymerization

Macromolecular Rapid Communications, EarlyView.
This work demonstrates how CO2‐derived poly(propylene carbonate) and poly(cyclohexene carbonate) backbones influence vitrimer thermo‐mechanical behavior. By tuning backbone composition, epoxide crosslinker chemistry and blend ratios, the crosslinked materials span a wide property window, from highly extensible to stiff, glassy networks, establishing an
Satej S. Joshi, Sophia Aracri, Mark D. Foster, James M. Eagan   +3 more
wiley   +1 more source

AI‐Driven Synthesis in Medicinal Chemistry: Integrating Large Language Models, Robotic Automation, and Sustainability Metrics to Accelerate Drug Discovery

Medicinal Research Reviews, EarlyView.
ABSTRACT Artificial intelligence (AI) is transforming synthetic chemistry from task‐specific predictors into integrated platforms that unify retrosynthesis, reaction optimization, and closed‐loop robotic automation. This review highlights how AI‐assisted planning and robotic execution shorten cycle times, reduce step counts, and improve route ...
Amit Gangwal, Antonio Lavecchia
wiley   +1 more source

Research of Wood-Polymer Compositions of DMTA Methods

International Journal of Science and Society, 2020
The article presents the results of polymer-wood composites, as well as the excretion of tritium woods and leaves. The base of the composite was made of thermoplastic polypropylene. Three composites prepared by the volume of filling content (25, 50 and 70%) and the various fractions of the used slags were prepared for research.
openaire   +1 more source

Nanocompósitos de poliamida 6/Argila organofílica: efeito do peso molecular da matriz na estrutura e propriedades mecânicas e termomecânicas Polyamide 6/organoclay nanocomposites: effect of matrix molecular weight on structure and mechanical and thermal-mechanical properties

Polímeros, 2008
Nanocompósitos de poliamida 6/argila organofílica foram preparados pelo método de intercalação por fusão. A argila foi tratada com o sal quaternário de amônio (Genamin) visando-se a obtenção da argila organofílica (OMMT).
Renê A. da Paz, Amanda M. D. Leite, Edcleide M. Araújo, Tomas J. A. Melo, Renata Barbosa, Edson N. Ito   +5 more
doaj   +1 more source

Effect of Nanosilica Aggregates/Agglomerates on Functional Properties of Poly(Butylene 2,5‐Furandicarboxylate)‐Based Nanocomposites

Polymer Composites, EarlyView.
Effect of nanosilica aggregates/agglomerates on oxygen and water vapor diffusivity of PBF/SiO2 nanocomposites. ABSTRACT The nanofillers inclusions in poly(butylene 2,5‐furandicarboxylate) (PBF)/SiO2 nanocomposites were found to consist of aggregates and agglomerates of nanosilica particles.
Giovanna Molinari, Lucia Ricci, Carlo Andrea Massa, Micaela Vannini, Laura Sisti, Paola Parlanti, Mauro Gemmi, Damiano Rossi, Maurizia Seggiani, Maria Cristina Righetti   +9 more
wiley   +1 more source

Melt and Cold Crystallization Behavior of Poly(Lactic Acid) With Different Molecular Weights and Its Influence on Mechanical, Viscoelastic, and Tribological Properties

Polymer Engineering &Science, EarlyView.
Modifying the crystallinity of PLA and its properties through annealing. ABSTRACT The melt and cold crystallization behavior of two PLA grades with different molecular weights was investigated using various DSC analyses. During isothermal melt crystallization, PLA with lower molecular weight exhibited faster crystallization kinetics across different ...
Rio M. Mungok, Joel Y. Vidua, Ulrich A. Handge   +2 more
wiley   +1 more source

DMTA analysis for long-term mechanical behaviour prediction of PMMA-based bone cements

, 2006
Poly(methyl methaerylate) (PMMA) is commonly used as acrylic bone cement to fix bone implants. In vivo degradation of bone cement may lead to a decrease in mechanical properties and result in aseptic loosening. Creeping can promote failure of the implant.
Marina Gomes, Simoes, JA, Guedes, RM
core   +1 more source

Experimental and Numerical Thermo‐Mechanical Characterization of Polylactic Acid Fabricated by Fused Filament Fabrication

Polymer Engineering &Science, EarlyView.
Experimental and numerical framework for characterizing the thermomechanical response of polylactic acid fabricated by fused filament fabrication. ABSTRACT This study investigates the thermomechanical response of polylactic acid (PLA) specimens fabricated by fused filament fabrication (FFF) at two nozzle temperatures (190°C and 230°C), while mechanical
B. Hanželič, B. Nečemer, S. Glodež, G. Harih   +3 more
wiley   +1 more source

Determination of the Linear Viscoelastic Material Behaviour of Interlayers with Semi-Crystalline Structures

Challenging Glass Conference Proceedings, 2022
The temperature dependent linear viscoelastic material behaviour of the most commonly used interlayer PVB is typically determined by means of Dynamic-Mechanical-Thermal-Analysis (DMTA).
Miriam Schuster
doaj