Results 11 to 20 of about 33,147 (342)
Kinetic Investigation of Polyurethane Rubber Formation from CO2‐Containing Polyols [PDF]
, 2020 A novel CO2 utilization technology allows for the inclusion of CO2 as carbonate units and double bond moieties to give additional functionality in polyether polyols.
Buchner, Georg A. +5 more
core +1 more source
Residual Isocyanates in Medical Devices and Products: A Qualitative and Quantitative Assessment
Environmental Health Insights, 2016 We conducted a pilot qualitative and quantitative assessment of residual isocyanates and their potential initial exposures in neonates, as little is known about their contact effect.
Gillian Franklin +8 more
doaj +1 more source
eXPRESS Polymer Letters, 2017 Presented research shows the results of a study on mechanical properties of materials obtained in the course of innovatory application of epoxidized vegetable oil in the synthesis of new bio-based epoxy resins, crosslinked with curing agents which are ...
A. Sienkiewicz, P. Czub
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2022 An economical and versatile protocol for the one-pot synthesis of monomethylamines by reduction of N-substituted carbonylimidazoles with NaBH4/I2 in THF at reflux temperature is described. This method used no special catalyst and various monomethylamines
Lin Chen +5 more
doaj +1 more source
Spirometric measurement among polyurethane foam mattress-making workers of India
Indian Journal of Community Medicine, 2021 Background: The polyurethane foam (PUF) mattress-making workers are exposed to isocyanates which are known respiratory toxicants and cause effect on pulmonary volumes and flows.
Rajnarayan Ramshankar Tiwari +1 more
doaj +1 more source
Occupational exposure to selected isocyanates in Polish industry
Medycyna Pracy, 2015 Background: Isocyanates constitute a group of highly reactive, low molecular weight chemicals used worldwide for polyurethane manufacturing. The occupational exposure to these compounds is a major cause of occupational asthma, thus it is very important ...
Sławomir Brzeźnicki +1 more
doaj +1 more source
Thermal curing of an epoxy-anhydride system modified with hyperbranched poly(ethylene imine)s with different terminal groups [PDF]
, 2017 New hyperbranched polymers (HBP) have been synthesized by reaction of a poly(ethylene imine) with phenyl and t-butyl isocyanates. These HBPs have been characterized by 1H-NMR (nuclear magnetic resonance of hydrogen) and Fourier transform infrared ...
Acebo Gorostiza, Cristina +5 more
core +2 more sources
Frontiers in Chemistry, 2019 Using isocyanate-functionalized Kraft lignin as a reactive macromonomer for the preparation of polyurethane foams by a prepolymer technique is a well-known strategy to incorporate the biomacromolecule into a higher value polymer material.
Mareike Zieglowski +9 more
doaj +1 more source
Journal of Occupational Medicine and Toxicology, 2011 Background Isocyanates are some of the leading occupational causes of respiratory disorders, predominantly asthma. Adequate exposure monitoring may recognize risk factors and help to prevent the onset or aggravation of these aliments.
Lemiere Catherine +4 more
doaj +1 more source
Modeling of Isocyanate Synthesis by the Thermal Decomposition of Carbamates
Computation, 2020 The presented work is devoted to isocyanate synthesis by the thermal decomposition of carbamates model. The work describes the existing isocyanate-obtaining processes and the main problems in the study of isocyanate synthesis by the thermal decomposition
Ratmir Dashkin +7 more
doaj +1 more source