Results 111 to 120 of about 33,147 (342)
Asian Pacific Journal of Environment and Cancer, 2019 Background: Appliance manufacturing boom is very high hand customers always have a great deal of attention to products that have low energy consumption, therefore the use of isocyanates MDI as a thermal insulation in the body of the refrigerator and is ...
Ahmad Nikpey +4 more
doaj +1 more source
Vegetable Oil‐Based Materials for Drug Delivery Systems and Wound Dressings
Macromolecular Bioscience, EarlyView.Renewable resources like vegetable oils are increasingly explored for biomaterial production in biomedical applications. Their monoglycerides and triglycerides inherently possess functions or can be chemically modified to introduce functional groups suitable for polymerization, yielding biomaterials with desirable properties such as flexibility ...
Lucas M. Favre +2 more
wiley +1 more source
CHIMIA, 1992 Adducts obtained by 1,3-dipolar cycloadditions to 2,3-dihydroisothiazol-3-one 1,1-dioxides are inclined to undergo a cheletropic process, by which the newly formed heterocyclic part undergoes aromatization, while SO2 is extruded and an ...
Kaspar F. Burri
doaj +2 more sources
, 1997 Medical screening of workers is one of the tools often used to assess suitability for work and to attempt to reduce worker ill-health. This article outlines the objectives of the screening process and the basic criteria to be followed in developing a ...
Gauci, Mark, Vella, Noel
core
Bio-Based Polyurethane Foams: Feedstocks, Synthesis, and Applications
BiomoleculesPolyurethanes (PUs) are extremely versatile materials used across different industries. Traditionally, they are synthesized by reacting polyols and isocyanates, both of which are petroleum-derived reagents. In response to the demand for more eco-friendly
Marta Santos +4 more
doaj +1 more source
In Situ Synthesized Glycerol‐Releasing Nanocarriers Unlock Superlubricity in Oil‐Based Lubricants
Macromolecular Materials and Engineering, EarlyView.This study presents an in situ synthesis of glycerol‐based nanocarriers in hydrophobic lubricant oils via inverse miniemulsion polymerization. Encapsulating glycerol within a glycerol‐based polyurethane shell resolves miscibility issues between glycerol and the hydrophobic base oil, yielding novel nanoadditives with tunable glycerol loading.
Sarah S. Lembke +4 more
wiley +1 more source
Occupational allergic and irritant contact dermatitis in workers exposed to polyurethane foam
International Journal of Occupational Medicine and Environmental Health, 2014 Objectives: To evaluate sensitization to chemicals present in work environment after an outbreak of contact dermatitis in workers of vehicle equipment factory, exposed to polyurethane foam, based on 4,4'-diphenylmethane diisocyanate (MDI).
Marta Kieć-Świerczyńska +4 more
doaj
Synthesis, Modification and Prospect of Bio-based Polyurethane
Pige Kexue Yu GongchengBio-based polyurethane is a type of polyurethane material primarily derived from natural bio-based raw materials, synthesized through the reaction of bio-based polyols and bio-based isocyanates.
Kangjia SONG +4 more
doaj +1 more source
Interfacial Energy and Composition Controlled Self‐Stratification in Polyurethane Coatings
Macromolecular Materials and Engineering, EarlyView.This study elucidates self‐stratification in polyurethane coatings driven by interfacial energies and composition‐dependent phase separation. Using XPS, SIMS, and Raman analyses, we reveal rapid formation of hydrophobic and hydrophilic layers and substrate‐dependent interfacial structures.
Gaurav Singhal +11 more
wiley +1 more source
Polymer Composites, EarlyView.The Promise of Coir Fiber Laminates in Sustainable Structural Engineering. ABSTRACT This study explores sandwich structures based on the waste fiber metal laminate concept, integrating short random‐coir‐fiber composites with aluminium skins. The research investigates the combination of low‐cost aluminum alloy and natural fiber composites, focusing on ...
Júlio C. dos Santos +6 more
wiley +1 more source