Results 41 to 50 of about 8,475 (118)

Caracterización de asfaltos modificados con diferentes aditivos

open access: yesIngeniería, 2011
El uso de asfaltos modificados en la construcción de pavimentos flexibles se ha extendido a nivel mundial como respuesta a condiciones más severas durante su vida útil y buscando un mejor desempeño que permita prolongar su duración.
Fabián Elizondo Arrieta   +2 more
doaj   +1 more source

Bio‐Based Citrate Plasticizers as Nucleating Agents for PLA Fibers: Unlocking Antioxidant and Antimicrobial Potential

open access: yesMacromolecular Chemistry and Physics, Volume 227, Issue 3, 16 February 2026.
Uniform and bead‐free PLA fibers containing functional biobased plasticizers for potential application in food packaging are prepared by force‐spinning technique. ACETEM and CITREM commonly used as food additives are employed within the fibers to provide such functional properties to the fiber mats.
Ignacio Mena‐Prado   +7 more
wiley   +1 more source

ACERCA DEL VOLUMEN LIBRE PROMEDIO EN CO-POLÍMEROS DIBLOQUE DE POLI-ESTIRENO Y POLI-ISOPRENO

open access: yesAnales (Asociación Física Argentina), 2008
Se determinó el volumen libre promedio en co-polímeros dibloque de (poli-estireno)-co-(poli-isopreno) para dos composiciones determinadas: 13.1 y 89.1 de porcentaje en masa de poli-estireno, respectivamente.
F. Herrera   +3 more
doaj  

Lingüística de interações moleculares

open access: yesTrans/Form/Ação, 1991
As moléculas biológicas mais interessantes são longos polímeros. Em analogia com a linguagem humana alfabética, estes podem ser chamados de textos, e analisados, quanto à estrutura primária, como sequência de letras (monômeros; como nucleotídeos ...
Romeu Cardoso Guimarães
doaj   +1 more source

Nitrogen‐Rich, Tröger's Base‐Linked Porous Organic Polymers (POPs) as Heterogeneous Catalysts and Adsorbents of Organic Pollutants From Water

open access: yesJournal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
Synthesized Tröger's based POPs showed great versatility in heterogeneous catalysis reactions and for pollutant adsorption. ABSTRACT Porous organic polymers are a new class of polymeric materials that combine permanent porosity, high surface area, monomer diversity, and synthetic tunability, making them highly promising candidates for application in ...
Tiago F. Machado   +4 more
wiley   +1 more source

Integration of Polymer‐Based Phase Change Materials Into Building Walls in the Hot Region of Algeria

open access: yesSPE Polymers, Volume 7, Issue 1, January 2026.
Schematic illustration of the integration of polymer‐based phase change materials (PEG/diatomite, PEG‐1000, and fatty‐acid polyurethane) into multilayer building walls in the hot region of Algeria, showing their optimal placement near the exterior wall to absorb daytime heat, delay heat transfer, and reduce indoor temperature fluctuations, thereby ...
Houssem Goudjil   +5 more
wiley   +1 more source

Analysis of Methyl Substitution in Phenolic Compounds as Potential Biofuel Additives: From Solid‐State Description to Antioxidant Potential

open access: yesChemistrySelect, Volume 11, Issue 2, 15 January 2026.
The rising demand for renewable energy points to biodiesel as a viable fossil fuel alternative, yet its limited oxidative stability remains a challenge. This study reveals that methyl‐substituted hydroquinone derivatives exhibit enhanced antioxidant capacity, suggesting their promise as biofuel additives.
João P. M. Rodrigues   +5 more
wiley   +1 more source

Um experimento didático em termogravimetria: estudo da degradação térmica de amostras comerciais de PVC e PVAc

open access: yesRevista Principia, 2007
O Estudo da degradação térmica de amostras comercias de Cloreto e Acetato de Polivinila é proposto como experimento didático para a introdução do estudo da análise térmica nos cursos de graduação.
Robson Fernandes de Farias
doaj   +1 more source

Influencia de aditivos (polímeros y polialuminio) en las propiedades físico-mecánicas de mezclas asfálticas en caliente

open access: yesFIGEMPA, 2020
A nivel mundial se ha emprendido el uso de aditivos a fin de tener mezclas asfálticas de mejor calidad y que permitan disminuir el envejecimiento prematuro de las mismas, en nuestro país se requiere investigaciones que sean ejecutadas con distintos ...
Paul Javier León-Torres   +2 more
doaj   +1 more source

Magnetic Hopfions as Local Rotations of the Uniform Magnetization Background

open access: yesphysica status solidi (RRL) – Rapid Research Letters, Volume 19, Issue 12, December 2025.
The Hopf mapping of 3D coordinate space to the unit sphere m2 = 1 in the magnetization space m(r) can be parametrized by some angles. These angles are used to define a local rotation matrix to restore the hopfion magnetization configuration from the uniformly magnetized state for any Hopf indices.
Konstantin Y. Guslienko
wiley   +1 more source

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