Results 101 to 110 of about 23,225 (270)

Evaluation of respiratory exposure to 4,4-methylene diphenyl diisocyanate (MDI) vapors in foam injection workers in a household appliance manufacturing company: An Occupational Carcinogen

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, Hamzeh Saeidabadi, Salman Sheikhi, Saeed Yari, Tayyebeh Jaddi Madarsara   +4 more
doaj   +1 more source

Unusual reactivity of N-acyl imides: N-aroyl-1,2,4-dithiazolidine-3,5-diones as acyl isocyanate equivalents. [PDF]

, 2008
Crystalline samples of three N-aroyl-1,2,4-dithiazolidine-3,5-diones have been prepared as the first examples of a novel class of compound that displays the reactivity of an acyl isocyanate when treated with ...
Arbuzov, Arbuzov, Barany, Blais, Cane-Honeysett, Cane-Honeysett, Chen, Clifford D. Jones, Deng, Hari, Hari, Hill, Katritzky, Mark E. Wood, Planas, Speziale, Titherley, Victoria M. Annis, Wood, Zumach   +19 more
core   +1 more source

Recent Advances in Pickering Emulsion Templated Phase Change Material Microcapsules: Design, Fabrication, and Multifunctional Applications

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Fabrication process of phase change microcapsules using a Pickering emulsion template method and their subsequent applications. The increasing demand for efficient thermal energy storage systems has driven the development of phase change material microcapsules (PCMMs), which provide high energy‐storage density, reversible phase change, and reduced ...
Ziyan Li, Jinsheng Sun, Kaihe Lv, Chaozheng Liu, Meichun Li   +4 more
wiley   +1 more source

Synthesis, Modification and Prospect of Bio-based Polyurethane

Pige Kexue Yu Gongcheng
Bio-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, Feifei ZHANG, Jie LIU, Liqiang JIN, Deyi ZHU   +4 more
doaj   +1 more source

Development of polyisocyanurate pour foam formulation for space shuttle external tank thermal protection system [PDF]

Four commercially available polyisocyanurate polyurethane spray-foam insulation formulations are used to coat the external tank of the space shuttle. There are several problems associated with these formulations.
Butler, John M., Chartoff, Richard P., Harvey, James A.   +2 more
core   +1 more source

Synthesis and Thermal Characterization of Polyurethanes Obtained from Cottonseed and Corn Oil-Based Polyols [PDF]

, 2016
The use of vegetable oils to replace fossil feedstock has become an area of opportunity and a priority for study in the field of polymer science. Vegetable oils are considered as renewable resources with high potential, low cost and full availability ...
Aguilar-González, Cristóbal Noé, Burgos, Nuria, Cruz-Aldaco, Karina, Flores-Loyola, Erika, Jiménez, Alfonso   +4 more
core   +3 more sources

Synergistic Modulation of Conductivity and Oxidation Stability in SiHfBCN Ceramics via UV‐Assisted Structural Evolution

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A quinary UV‐curable SiHfBCN ceramic photoresist with high ceramic yield enhanced is developed through sequential molecular design for high‐temperature sensing coatings. The elevated interconnected conductive network induced by chemically bonded carboxylated MWCNTs enables the pyrolyzed ceramics' enhanced conductivity and excellent oxidation stability.
Xiyue Zhu, Mingshuo Zhang, Jun Chen, Chen Hu, Jinshuo Zhang, Xin Liu, Xichao Dong, Laifei Cheng, Xingang Luan   +8 more
wiley   +1 more source

Bio-Based Polyurethane Foams: Feedstocks, Synthesis, and Applications

Biomolecules
Polyurethanes (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, Marcos Mariz, Igor Tiago, Susana Alarico, Paula Ferreira   +4 more
doaj   +1 more source

Push–Pull Ynamines and Push–Pull Ynamides: Synthesis, Structure, Reactivity, and Application

European Journal of Organic Chemistry, EarlyView.
Push–pull ynamines and push–pull ynamides, which carry an EWG and an amino or amido group as EDG, are highly interesting classes of EDG‐EWG alkynes that have been intensively studied due to their exceptional reactivity. In this review, the synthesis, structure, reactivity, and application of push–pull ynamines, push–pull ynecarbamates, push–pull ...
Hans‐Joachim Gais
wiley   +1 more source

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

European Journal of Organic Chemistry, EarlyView.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer, Jun Fang, Chonghuo Liu, Guillaume Lefèvre, Gérard Guillamot, Phannarath Phansavath, Virginie Ratovelomanana‐Vidal   +6 more
wiley   +1 more source