Results 121 to 130 of about 13,053 (263)

Reaction of acyl(aroyl) isocyanates with dimedon [PDF]

, 2020
The benzoyl and trichloroacetyl isocyanates react with dimedon to give the [4 + 2]-cycloadducts and the O- and C-addition products, whereas trifluoroacetyl isocyanate reacts to give the acid azomethine.
Arbuzov B., Dautova L., Zobova N.
core  

In Situ Curing‐Enabled 3D Printing of Continuous Fiber‐Reinforced Thermosetting Composites

Journal of Polymer Science, EarlyView.
In situ curing‐enabled the 3D printing of continuous fiber/thermoset composites, which were reviewed. Particularly, four types of in situ curing, were discussed, including Radiation‐induced curing, photothermal curing, electrothermal curing, and frontal polymerization. AI‐integrated printing was also analyzed.
Xiaofei Wu, Harrison Hayworth, Shiren Wang   +2 more
wiley   +1 more source

Purification and Properties of Polyvinyl Nitrate and Its Compatibility With Solid Oxidizers

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Polyvinyl nitrate (PVN) is a nitrate‐ester energetic binder that can be produced directly from polyvinyl alcohol—a cheap commodity feedstock—thereby offering potential cost and supply‐chain advantages over binders based on nitrocellulose and other specialty polymers.
Stephen Spice, Monica C. Chandwani, Carole A. Morrison, Colin R. Pulham   +3 more
wiley   +1 more source

Green polyurethanes from bio-based building blocks: Recent advances and applications

Green Synthesis and Catalysis
Polyurethanes (PUs) are among the most studied, manufactured, and employed polymers due to their versatility and wide range of applications. However, their synthesis generally relies on toxic, non-renewable, and harmful petroleum-based chemicals.
Filippo Campana, Giulia Brufani, Francesco Mauriello, Rafael Luque, Luigi Vaccaro   +4 more
doaj   +1 more source

Screening Surface Modifications to Benzene to Improve Solubility in Hydroxyl‐Terminated Polybutadiene (HTPB)—A DFT Demonstration

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT The objective of this paper is to demonstrate the advantage of computationally pre‐screening surface‐modifying material candidates, using density functional theory (DFT), to inform experimental synthesis and formulation efforts. This demonstration focuses on improving the solubility of benzene‐based materials in hydroxyl‐terminated ...
Samantha E. Knoth
wiley   +1 more source

Enhanced Biocatalysis in Nanofluidic Membrane Reactors With Goldilocks Nanopores for Enzymes

Small, EarlyView.
We show that enzyme confinement within the three‐dimensionally interconnected nanochannels of a polyurea molecular network membrane, featuring pore‐size tunability to match the enzyme size, enables a highly active nanofluidic reactor platform. Stable continuous‐flow operation for >200 h and a 30 000‐fold increase in specific space‐time yield over ...
Wangsuk Oh, Ji‐Woong Park
wiley   +1 more source

Transparent, solvent‐free, and pressure‐tolerant antifouling coatings via molecular nanocomposite engineering

Smart Molecules, EarlyView.
This work developed a solvent‐free, room temperature–curable transparent coating. Featuring an ultrasmall nanocomposite network, it achieves robust liquid‐repellent and anti‐fingerprint properties with eco‐friendly and scalable potential for multifunctional protection.
Jieran Li, Xiubin Xu, Yueyan Liang, Hongchun Mu, Yang Xue, Jianwei Liu, Daijiang Cai, Yue Lan, Jiahui Tang, Sizhe Wang, Zhenxuan Wei, Xu Wu   +11 more
wiley   +1 more source

Highly integrated, alignment healing, and full‐recyclable multifunctional flexible devices based on dynamic covalent bonds

Smart Molecules, EarlyView.
This study addresses stability, repair, and recycling in flexible devices using polymers with identical dynamic bonds but incompatible backbones. This enables robust integration, precise self‐healing, and full recyclability. We demonstrate optoelectronic sensors that, after damage, magnetically self‐assemble and heal upon heating.
Xianfei Cao, Yong Qi, Wenbin Niu, Bingtao Tang, Shufen Zhang   +4 more
wiley   +1 more source

Occupational asthma due to isocyanates. [PDF]

, 1988
162 subjects who had been exposed to isocyanates, who had developed symptoms during the exposure period, or in the evening or night and, therefore, had a history compatible with isocyanate-induced asthma, were studied with inhalation challenge testing to
L. Dal Vecchio, P. Maestrelli, DAL VECCHIO L, FABBRI, Leonardo, P. Boschetto, C. E. Mapp, MAPP, Cristina, MAESTRELLI P, FABBRI LM, BOSCHETTO, Piera   +9 more
core  

In Situ Construction of Phosphorus‐Containing Crosslinked Urethane Network Combined With Ammonium Polyphosphate via Reactive Blending for Enhancing Flame Retardancy and Anti‐Dripping Performance of Polylactic Acid Composites

Safety Science and Technology, EarlyView.
By in situ reaction blending, DOPO‐HQ and THEIC were added to PLA with MDI to construct a phosphorus containing polyurethane network, which significantly improved the flame retardant and anti‐dripping properties of polylactic acid composites. ABSTRACT Polylactic acid (PLA) is highly flammable and prone to severe melt dripping during combustion, which ...
Chiyuan Chen, Sadiqa Khan, Hongyu Yang, Xiaming Feng, Chaojun Wan   +4 more
wiley   +1 more source