Results 51 to 60 of about 315,589 (284)

High strength, medium density molded foam [PDF]

open access: yes, 1972
Toluene diisocyanate-based polyurethane produces molded-to-size foam products.
Fender, J. R.
core   +1 more source

A Bespoke Programmable Interpenetrating Elastomer Network Composite Laryngeal Stent for Expedited Paediatric Laryngotracheal Reconstruction

open access: yesAdvanced Functional Materials, EarlyView.
A programmable interpenetrating double‐network architecture, created via 3D‐TIPS printing and resin infusion, synergistically combines thermoplastic and thermosetting elastomers to balance structural rigidity and surface softness—crucial for paediatric laryngeal stents.
Elizabeth F. Maughan   +14 more
wiley   +1 more source

Study on the Properties of Silicon-Modified Polyurethane Anticorrosion Coating

open access: yesChemical Engineering Transactions, 2017
Polyurethane anticorrosion coating has been widely used as a metal coating material in recent years, but it has some shortcomings in hydrophobicity, heat resistance and hardness.
Liqin Yang   +4 more
doaj   +1 more source

Effect of different catalysts on recovery and reuse of waste polyurethane rigid foam

open access: yesMaterials Research Express, 2021
The sharp increase of waste polyurethane rigid foam has caused great harm to the natural environment. Ethylene glycol (EG) and propylene glycol (PG) was the alcoholysis agents, and KOH and Zn _3 [Co(CN) _6 ] _2 (DMC) were used as catalysts for ...
Xiaohua Gu   +3 more
doaj   +1 more source

Electroactive Liquid Crystal Elastomers as Soft Actuators

open access: yesAdvanced Functional Materials, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley   +1 more source

Analysis on Mechanical Characteristics of the Polyurethane Base Plate for Ballastless Track of High Speed Railway

open access: yesChemical Engineering Transactions, 2017
In this paper, test method is used in giving tensile strength test, elongation at break test, permanent compressive deformation, oil resistance test and dynamic and static stiffness test to the aging and non-aging polyurethane base plates, and it is used
Wenshuai Chen
doaj   +3 more sources

Molecular dynamics insights into temperature effects on polyurethane-aggregate adhesion: comparative analysis of SiO2 and CaCO3

open access: yesFrontiers in Built Environment
In this study, molecular dynamics was used to investigate the adhesion properties between polyurethane and aggregate and to reveal the adhesion mechanism between polyurethane and aggregate.
Haihong Zhang   +6 more
doaj   +1 more source

The effect of natural fibre reinforcement on polyurethane composite foams – A review

open access: yesScientific African, 2021
The use of natural fibre reinforced polyurethane composite foams is becoming increasingly popular in the cellular foam industry. This demand is due to the increase in the use of ecofriendly, biodegradable, and sustainable materials to produce ...
Charles Kuranchie   +2 more
doaj   +1 more source

Adhesive for aluminum withstands cryogenic temperatures [PDF]

open access: yes, 1972
Polyurethane adhesive mixed to various proportions with milled glass fibers match the thermal characteristics of 2014-T6 aluminum at cryogenic ...
Helf, J. C., Hill, W. L., Matsuoka, T.
core   +1 more source

Robust and Reversible Thermofluorescence in Solvent‐Free Thermoplastic Polyurethane Composites

open access: yesAdvanced Functional Materials, EarlyView.
Thermofluorescent polymer composites with high‐contrast optical outputs are prepared by solvent‐free blending of indenoquinacridone dye into a thermoplastic polyurethane matrix. The temperature‐dependent fluorescence originates from aggregation–dissociation of the dye molecules, regulated by competing hydrogen bonds from the polymer matrix.
Guanghua Yu   +8 more
wiley   +1 more source

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