Recycling Polyurethanes through Transcarbamoylation
ACS Omega, 2021 In this paper, we describe a new strategy to recycle polyurethanes (PUs) using base-catalyzed transcarbamoylation. PUs were depolymerized qualitatively in the presence of MeOH (methanol)/tetrahydrofuran as a solvent and tert-butoxide as a base catalyst ...
Liang Zhao, V. Semetey
semanticscholar +1 more source
Molecules, 2021 Optically active polymers are promising multifunctional materials with great application potentials. Herein, environmentally friendly optically active polyurethanes (OPUs) were obtained by introducing rotatory binaphthol monomer to polyurethane.
Ling Lin +4 more
doaj +1 more source
Synthesis of bio-based thermoplastic polyurethane elastomers containing isosorbide and polycarbonate diol and their biocompatible properties. [PDF]
, 2015 A new family of highly elastic polyurethanes (PUs) partially based on renewable isosorbide were prepared by reacting hexamethylene diisocyanate with a various ratios of isosorbide and polycarbonate diol 2000 (PCD) via a one-step bulk condensation ...
Gong, MS, Kang, MS, Knowles, JC, Oh, SY
core +1 more source
Deterioration rate of renewable polyurethanes composites prior to ultra violet irradiation exposure [PDF]
, 2019 Polyurethanes (PU's) made from renewable and sustainable materials are one of the most important groups of polymers because of their versatility with wide range of grades, densities and stiffness.
Abdullah, Nur Munirah +1 more
core +1 more source
Attachment of inorganic moieties onto aliphatic polyurethanes
Materials Research, 2007 Polyurethanes have been used in a series of applications due basically to their versatility in terms of controlling the behavior by altering basically the type of reagents used.
Eliane Ayres +2 more
doaj +1 more source
Asymmetrically Substituted s‐Triazine Phosphonates by One‐Step Synthesis
ChemistryOpen, 2023 Asymmetrically substituted s‐triazine phosphonates with up to three different phosphonate groups C3N3RR'R” with R, R’, R”=PO(OR”’) and R”’=for example, methyl, ethyl, isopropyl or n‐butyl are interesting as polymer additives like flame retardants ...
Claudia Vogt +5 more
doaj +1 more source
Rheological and Mechanical Gradient Properties of Polyurethane Elastomers for 3D-Printing with Reactive Additives [PDF]
, 2019 Polyurethane (PU) elastomers with their broad range of strength and elasticity are ideal materials for additive manufacturing of shapes with gradients of mechanical properties.
Auhl, Dietmar +4 more
core +1 more source
In vivo testing of crosslinked polyethers. II. Weight loss, IR analysis, and swelling behavior after implantation [PDF]
, 1996 As reported in Part I (In vivo testing of crosslinked polyethers. I. Tissue reactions and biodegradation, J. Biomed. Mater. Res., this issue, pp.
Bantjes, A +4 more
core +12 more sources
Flame Retardancy of Bio-Based Polyurethanes: Opportunities and Challenges
Polymers, 2020 Sustainable polymers are emerging fast and have received much more attention in recent years compared to petro-sourced polymers. However, they inherently have low-quality properties, such as poor mechanical properties, and inadequate performance, such as
H. Vahabi +5 more
semanticscholar +1 more source
Effect of Glycerol in Soft and Hard Segments on Properties of Shape Memory Polyurethane [PDF]
علوم و تکنولوژی پلیمر, 2023 Hypothesis: Chemical cross-linked shape memory polyurethanes (CSMPUs) can have various applications in different fields such as medicine, where mechanical behavior and shape memory are improved in these samples compared to linear shape memory ...
Mahdi Sakhavi +3 more
doaj +1 more source