Results 41 to 50 of about 7,310 (265)

Segmented linear shape memory polyurethanes with thermoreversible Diels-Alder coupling: Effects of polycaprolactone molecular weight and diisocyanate type

open access: yeseXPRESS Polymer Letters, 2016
Segmented linear polyurethanes (PUs) containing Diels-Alder (DA) adduct were synthesized in toluene solution from poly(ε-caprolactone) (PCL, Mn = 10, 25 and 50 kg/mol), diisocyanate (methylene diphenyl diisocyanate (MDI), 2,4-toluene diisocyanate (TDI ...
Cs. Lakatos   +5 more
doaj   +1 more source

Smart polyurethane composites: Magnetic-field-sensitive crosslinked shape-memory polyurethane composites

open access: yeseXPRESS Polymer Letters, 2023
Smart polymers synthesized from renewable sources are precious because of the environmental pressures of producing polymers from fossil fuels. This study develops a new formulation of polyurethane (PU) from partly renewable resources.
Berna Öztürk   +3 more
doaj   +1 more source

From Geometry to Function: Programmable Mechanical Response in 3D‐Printed Adipose‐Inspired Soft Metamaterials

open access: yesAdvanced Functional Materials, EarlyView.
Geometry‐driven design of soft cellular metamaterials is systematically investigated by combining experiments, finite element modeling, and statistical prediction. The study quantifies how unit cell geometry and material properties govern stiffness, instability, densification, and energy absorption.
Alice Berardo   +4 more
wiley   +1 more source

Sustainability in polyurethanes: old hat or new strategy for future developments?

open access: yesnpj Materials Sustainability
Polyurethanes are facing health and environmental problems related to their chemistry, processing and end-of-life management. This review summarizes the most recent strategies within the framework of sustainability and circularity related to the use of ...
Giulio Malucelli, Alessandra Lorenzetti
doaj   +1 more source

Les lipides : une matière première alternative pour la synthèse de polymères de spécialités

open access: yesOléagineux, Corps gras, Lipides, 2012
Currently, the dependence of the chemical industry on fossil fuels is very important (95 % of chemicals from fossil fuels). In addition, the scarcity of nonrenewable resources is one – with climate change, pollution, increasing population, limited water ...
Chollet Guillaume   +3 more
doaj   +1 more source

Synthesis, kinetics of photo-dimerization/photo-cleavage and physical properties of coumarin-containing branched polyurethanes based on polycaprolactones

open access: yeseXPRESS Polymer Letters, 2016
A series of coumarin-containing branched polyurethanes based on polycaprolactones, hexamethylene diisocyanate and a monohydroxylated coumarin monomer with 5 and 10% content by weight of coumarin units were successfully prepared.
R. Seoane Rivero   +4 more
doaj   +1 more source

Biodegradable and Biocompatible Functional Polymers for Biomedical Applications

open access: yesAdvanced Functional Materials, EarlyView.
Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han   +5 more
wiley   +1 more source

Polymer Substrates for Flexible Sensors: Advances and Contributions to Smart Agriculture

open access: yesAdvanced Functional Materials, EarlyView.
This review comprehensively summarizes recent advances in polymer‐based flexible sensors for smart agriculture, focusing on polymer substrate design, interface engineering, and applications in soil, plant, animal, aquaculture, and post‐harvest monitoring.
Yihui Li   +12 more
wiley   +1 more source

Multifunctional Solid Polymer Electrolyte Films Integrating Intrinsic Self‐Healing and Dual Photo‐/pH‐Responsive Ionic Sensing for Intelligent Flexible Electronics

open access: yesAdvanced Functional Materials, EarlyView.
Multifunctional solid polymer electrolyte (SPE) films integrating intrinsic self‐healing, mechanical stretchability, and dual photo‐ and pH‐responsive ionic conductivity are developed. Constructed from thermoplastic polyurethane (TPU) and hydrogen‐bonded poly(thiourea triethylene glycol) (PTUEG3), these films form a dynamic supramolecular network ...
Mei‐Li Li   +12 more
wiley   +1 more source

Synthesis of bio-based building blocks from vegetable oils: a platform chemicals approach

open access: yesOléagineux, Corps gras, Lipides, 2013
This review reports the synthesis of various building blocks from vegetable oils in one or two-steps syntheses. Thiol-ene coupling allows to synthesize new biobased reactants with various function and functionality with reaction conditions in agreement ...
Desroches Myriam   +3 more
doaj   +1 more source

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