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 wt.%) of a relatively highly microporous porous polymer network (PPN). SEM images of the manufactured MMMs exhibited good compatibility between the two phases for all Read more about 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[…]

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, including micronized rubber from end-of-life tires, is studied. The integration of these composites as part of ultrasonic transducers can further expand the functionality of the Read more about Micronized Recycle Rubber Particles Modified Multifunctional Polymer Composites: Application to Ultrasonic Materials Engineering[…]

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, N2 adsorption, Hg intrusion porosimetry, thermogravimetric analysis, 13C solid state nuclear magnetic resonance (NMR) and 1H NMR relaxometry, we investigated changes in the chemistry and structure of biochar as Read more about Response of water-biochar interactions to physical and biochemical aging[…]

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 to show thermally activated shape-memory response. In particular, 1H NMR analyses confirmed the chemical structure of the supramolecular polyurethanes, while DSC showed their totally amorphous morphology. Read more about Supramolecular Polycaprolactone-Based Polyurethanes with Thermally Activated Shape-Memory Behavior[…]

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 back into the manufacturing industry. Such a process requires providing enough energy to break the sulfur links, while preventing damage to the polymeric chain. Microwave Read more about Dynamic Permittivity Measurement of Ground-Tire Rubber (GTR) during Microwave-Assisted Devulcanization[…]

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 Nations and the new laws of the European Union, such as the Green Deal, it will be able to put an end to the great Read more about Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model[…]

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 biodegradable polymers were chemically and physically characterized by several techniques and methods including bioassay and water uptake measurements. The molecular weight of the soft segment Read more about 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[…]

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 both ionic and covalent bonds were developed, as these materials do not lose their elastomeric behavior below their transition (or activation) temperature (using ionic transition Read more about Shape-Memory Composites Based on Ionic Elastomers[…]

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 their attractive biocompatibility. Through an activation with Chloro-(trimethyl)silane (Cl-TMS) during the polymerization reaction, the reactivity of these diamines against diisocyanates was triggered, leading to PUUs Read more about Preparation of High Molecular Weight Poly(urethane-urea)s Bearing Deactivated Diamines[…]

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 reaction between dimethyl terephthalate and diethylene glycol, and a well-characterized fraction of PDET with number average molecular weight of 3,650 g mol−1 was chosen for the synthesis of Read more about Properties of polyurethanes derived from poly(diethylene glycol terephthalate)[…]

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 and thermal properties and also for their large aspect ratio, that is, small size and higher surface area. On this regard, CNT-rubber composites have been Read more about New insight into structure-property relationships of natural rubber and styrene-butadiene rubber nanocomposites filled with MWCNT[…]

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 Catalysis]

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 Technology (CSIC), c/Juan de la Cierva 3, Madrid, Spainc División de Ciencias Exactas Departamento de Química, Universidad de Guanajuato, Guanajuato, México DOI: 10.1007/s10965-019-1821-6

Swelling of polymer networks with topological constraints: Application of the Helmis-Heinrich-Straube model

Swelling of polymer networks with topological constraints: Application of the Helmis-Heinrich-Straube model Express Polymer Letters Basterra-Beroiz, B.a, Rommel, R.a, Kayser, F.a, Westermann, S.a, Valentín, J.L.b, Heinrich, G.c a Goodyear Innovation Center Luxembourg, Avenue Gordon Smith, Colmar-Berg, Luxembourgb Institute of Polymer Science and Technology (CSIC), c/Juan de la Cierva 3, Madrid, Spainc Leibniz-Institut für Polymerforschung Dresden Read more about Swelling of polymer networks with topological constraints: Application of the Helmis-Heinrich-Straube model[…]

Revisiting Segmental Order: A Simplified Approach for Sulfur-Cured Rubbers Considering Junction Fluctuations and Entanglements

Revisiting Segmental Order: A Simplified Approach for Sulfur-Cured Rubbers Considering Junction Fluctuations and Entanglements Macromolecules Basterra-Beroiz, B.a, Rommel, R.a, Kayser, F.a, Valentín, J.L.b, Westermann, S.a, Heinrich, G.c a Goodyear Innovation Center Luxembourg, Avenue Gordon Smith, Colmar-Berg, Luxembourg b Institute of Polymer Science and Technology (CSIC), c/Juan de la Cierva 3, Madrid, Spain c Leibniz-Institut für Read more about Revisiting Segmental Order: A Simplified Approach for Sulfur-Cured Rubbers Considering Junction Fluctuations and Entanglements[…]

Graphical Abstract SoftMatter

The shape-memory effect in ionic elastomers: fixation through ionic interactions

The shape-memory effect in ionic elastomers: fixation through ionic interactions Soft Matter (2017) 13, 2983-2994 A. González-Jiméneza, M. A. Malmiercaa, P. Bernal-Ortegaa, P. Posadasa, R. Pérez-Aparicioa, A. Marcos-Fernándeza, P. T. Matherb and J.L. Valentína. a Institute of Polymer Science and Technology (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain b Biomedical and Chemical Engineering Read more about The shape-memory effect in ionic elastomers: fixation through ionic interactions[…]

Elimination of the Crystallinity of Long Polyethylene Oxide-Based Copolymers for Gas Separation Membranes by Using Electron Beam Irradiation

Elimination of the Crystallinity of Long Polyethylene Oxide-Based Copolymers for Gas Separation Membranes by Using Electron Beam Irradiation Macromolecular Chemistry and Physics Angel Marcos‐Fernándeza Esbaide Ademb Alejandra Rubio Hernández‐Sampelayoa Jose E. Báezb Laura Palacioc Pedro Prádanosc Alberto Tenac Antonio Hernándezc a Institute of Polymer Science and Technology (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Read more about Elimination of the Crystallinity of Long Polyethylene Oxide-Based Copolymers for Gas Separation Membranes by Using Electron Beam Irradiation[…]

Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam

Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam Radiation Physics and Chemistry (2017) Adem, E.a, Hernández-Sampelayo, A.R.c, Báez, J.E.d, Miranda, J.a, Labrada-Delgado, G.J.b, Marcos-Fernández, A.c aInstituto de Física, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México D.F., Mexico bInstituto Potosino de Investigación Científica y Tecnológica, Read more about Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam[…]

Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam

Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam Radiation Physics and Chemistry, 2017, Volume 130, Pages 5-11 Adem, E.a, Hernández-Sampelayo, A.R.c, Báez, J.E.d, Miranda, J.a, Labrada-Delgado, G.J.b, Marcos-Fernández, A.c a Instituto de Física, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México D.F., Mexico b Instituto Read more about Physical properties of biaxially oriented poly(ethylene terephtalate) irradiated at different temperatures and doses with electron beam[…]

Graphical Abstract

Poly(ε-caprolactone) Diols (HOPCLOH) and Their Poly(ester-urethanes) (PEUs): The Effect of Linear Aliphatic Diols [HO–(CH2)m–OH] as Initiators

Poly(ε-caprolactone) Diols (HOPCLOH) and Their Poly(ester-urethanes) (PEUs): The Effect of Linear Aliphatic Diols [HO–(CH2)m–OH] as Initiators Polymer – Plastics Technology and Engineering, 2017, Volume 56, Issue 8, Pages 889-898 Báez, J.E.a, Marcos-Fernández, Á.b, Martínez-Richa, A.a, Galindo-Iranzo, P.c a Department of Chemistry, University of Guanajuato (UG), Guanajuato, Gto, Mexico b Department of Polymer Physics, Elastomers and Read more about Poly(ε-caprolactone) Diols (HOPCLOH) and Their Poly(ester-urethanes) (PEUs): The Effect of Linear Aliphatic Diols [HO–(CH2)m–OH] as Initiators[…]