Publicaciones | Publications
Introducing MEW2 Software: A Tool to Analyze MQ-NMR Experiments for Elastomers
Low-field time-domain proton Nuclear Magnetic Resonance (NMR) spectroscopy is an attractive and powerful tool for studying the structure and dynamics of elastomers. The existence of crosslinks and other topological constraints…
Tailoring/Tuning Properties of Polyester Urea-Urethanes through Hybridization with Titania Obtained Using the Sol–Gel Process
Hybrid materials have been studied because in these materials the properties of organic components, such as elasticity and biodegradability, could be combined with the properties of inorganic components, such as…
Improving the performance of biobased polyurethane dispersion by the incorporation of photo-crosslinkable coumarin
High biobased carbon content polyurethane dispersions (PUD) are a more sustainable alternative to conventional oil-derived waterborne dispersions in coatings. However, there are still many performance limitations from restricted availability of…
Síntesis, caracterización estructural de redes metal orgánicas (MOFs) y su evaluación en catálisis heterogénea de polímeros biodegradables
Metal-organic frameworks (MOF) are porous materials made up of organic binders and a metal cluster, currently attracting attention as heterogeneous catalysts in various reactions of interest. However, their application in…
Effect of gamma irradiation on the physical properties of poly(butylene succinate) (PBS) and poly(butylene succinate-co-adipate) (PBSA)
PBS and PBSA were irradiated with gamma up to a 400 kGy dose. Gel content appeared at approximately 100 kGy dose with a higher gel content for PBSA. Charlesby-Pinner analysis indicated that…
Crosslinked networks in electron beam irradiated polyethylenes evaluated by proton low-field NMR spectroscopy
Effect of electron beam (EB) irradiation is analyzed in low and high density polyethylenes (LDPE and HDPE, respectively) at different doses. Parameters as important as degree of crystallinity, melting or…
Thermally Rearranged Mixed Matrix Membranes from Copoly(o-hydroxyamide)s and Copoly(o-hydroxyamide-amide)s with a Porous Polymer Network as a Filler — A Comparison of Their Gas Separation Performances
Copoly(o-hydroxyamide)s (HPA) and copoly(o-hydroxyamide-amide)s (PAA) have been synthesized to be used as continuous phases in mixed matrix membranes (MMMs). These polymeric matrices were blended with different loads (15 and 30…
Micronized Recycle Rubber Particles Modified Multifunctional Polymer Composites: Application to Ultrasonic Materials Engineering
There is a growing interest in multifunctional composites and in the identification of novel applications for recycled materials. In this work, the design and fabrication of multiple particle-loaded polymer composites,…
Response of water-biochar interactions to physical and biochemical aging
Biochar aging may affect the interactions of biochar with water and thus its performance as soil amendment; yet the specific mechanisms underlying these effects are poorly understood. By means of FTIR,…
Supramolecular Polycaprolactone-Based Polyurethanes with Thermally Activated Shape-Memory Behavior
In this work, using supramolecular polyurethanes theories, two polycaprolactone-based polyurethanes with 2-ureido-4-[1H]-pyrimidinone (UPy) motifs capable of forming quadruple hydrogen bonds were synthetized and characterized, focusing our attention on their capability…
Dynamic Permittivity Measurement of Ground-Tire Rubber (GTR) during Microwave-Assisted Devulcanization
Many efforts are being made to find innovative ways of recycling rubber from end-of-life tires (ELTs), also called ground tire Rubber (GTR). Recycling through devulcanization allows the reintroduction of rubber…
Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model
The circular economy is a path that society, governments, and business must adopt to develop a viable and sustainable model for plastic production. Following the route guided by the United…
Biodegradable and Biocompatible Thermoplastic Poly(Ester-Urethane)s Based on Poly(ε-Caprolactone) and Novel 1,3-Propanediol Bis(4-Isocyanatobenzoate) Diisocyanate: Synthesis and Characterization
A series of non-toxic biodegradable and biocompatible polyurethanes bearing p-aminobenzoate moieties are presented. The introduction of this attractive motif was carried out by the synthesis of a novel isocyanate. These…
Shape-Memory Composites Based on Ionic Elastomers
Shape-memory polymers tend to present rigid behavior at ambient temperature, being unable to deform in this state. To obtain soft shape-memory elastomers, composites based on a commercial rubber crosslinked by…
Preparation of High Molecular Weight Poly(urethane-urea)s Bearing Deactivated Diamines
The synthesis of poly(urethane-urea) (PUUs) bearing deactivated diamines within the backbone polymer chain is presented. Several deactivated diamines present interesting properties for several applications in the biomaterial field due to…
Properties of polyurethanes derived from poly(diethylene glycol terephthalate)
The synthesis of linear and crosslinked polyurethanes based on α,ω-dihydroxypolydiethylene glycol terephthalate (PDET) is described. Prior to the preparation of these materials, a PDET polymer was obtained by conventional condensation…
New insight into structure-property relationships of natural rubber and styrene-butadiene rubber nanocomposites filled with MWCNT
The outstanding properties of carbon nanotubes (CNT) have generated a lot of interest at a scientist and industrial level. CNT have attracted great attention due to their exceptional mechanical, electrical…
Adamantyl-BINOL as platform for chiral porous polymer aromatic frameworks. Multiple applications as recyclable catalysts
Adamantyl-BINOL as platform for chiral porous polymer aromatic frameworks. Multiple applications as recyclable catalysts Journal of Catalysis Cristina Monterde, Rodrigo Navarro, Marta Iglesias, Félix Sánchez DOI: 10.1016/j.jcat.2019.07.059 Links: [Journal of…
Polymerization of e-caprolactone with degraded PET for its functionalization
Journal of Polymer Research Espinoza-García, K.a, Marcos-Fernández, A.b, Navarro, R.a, Ramírez-Hernández, A.a, Báez-García, J.E.c, Rangel-Porras, G.c a Departamento de Química, Universidad del Papaloapan, Oaxaca, México.b Institute of Polymer Science and…