In this study, cellulose acetate (CA)/polyvinylpyrrolidone (PVP) core⁻shell nanofibers were successfully fabricated by electrospinning their homogeneous blending solution. Uniform and cylindrical obtained when the PVP content increased from 0 to 2 wt %. Because of concentration gradient associated with solvent volatilization, composite fibers flattened 5 Fourier transform infrared spectroscopy (FTIR) X-ray diffraction (XRD) results confirmed existence a hydrogen bond between CA molecules,...

Schematic of the fabrication procedure SMCB@Ag with grape-like structure.

Unsaturated polyester resin (UPR) with excellent flame retardant is mainly obtained by adding large amounts of retardants, usually at the expense mechanical properties. In this work, a reactive containing phosphorus and nitrogen (DOPO-N) was successfully synthesized incorporated in UPR as crosslinker. The flame-retardant properties composites were enhanced. UPR/30DOPO-N passed UL-94 V-1 rating limiting oxygen index (LOI) 30.8%. tensile strength increased 24.4%. On basis, small amount...

Lithium–sulfur batteries have become glamorous candidates benefitting from their attractive specific capacity (1675 mAh g–1) and nontoxic properties, but the existing problems remain to be solved. In this work, CoSe2–nitrogen-doped carbon (CSN) connected by nanotubes was synthesized with Prussian blue melamine as a precursor source, respectively, named CSNC, which has high electronic conductivity anchoring effect on lithium polysulfides (LiPSs). CSNC is used both sulfur carrier separator...

In this research, expandable graphite (EG) and ammonium polyphosphate (APP) were incorporated into water-blow semirigid polyurethane foam (SPUF) as flame retardants. The synergistic retardant effects of EG with APP in SPUF had been studied by thermogravimetric analysis (TGA), limiting oxygen index (LOI), horizontal burning test, polarizing microscope, scanning electron microscopy (SEM). results indicated that used together could effectively improve the retardancy SPUF. When to ratio reached...

Coordination (co)polymerization of<italic>para</italic>-isopropenylstyrene (<italic>p</italic>IPSt) and<italic>meta</italic>-isopropenylstyrene (<italic>m</italic>IPSt), initiated by scandium (Sc) based catalysts, afforded new type of products, bearing pendant isopropenyl groups with perfect syndiotacity (<italic>rrrr</italic>&gt; 99%).

Copolymerization of ethylene (E) and butadiene (BD) is rather difficult due to their unmatched reactivity incompatible mechanism, high-efficient preparation amorphous random E/BD copolymers with high molecular weight more challenging. Herein, we report the copolymerization E BD using half-sandwich fluorenyl scandium complex constrained geometry configuration complexes attached pyridinyl N-heterocyclic carbene ligands. The precursor bearing moderate sterics medium Lewis acidity exhibited...

Carbon black/silicone rubber composites with large-area-homogeneous-low electrical-resistance used as electroplating matrix and its fine electro-deposited Ni layer.

Soluble ammonium polyphosphate (SAPP) is employed to prepare flame retardant semirigid polyurethane foam (SPUF) using water as blowing agent. The property of SPUF evaluated by limiting oxygen index (LOI) and horizontal burning test. Also the thermal degradation mechanism studied TG Fourier transform infrared (FTIR). results show that, with increase content SAPP, improves obviously LOI value increases rate decreases. And residual char increased up 20% 19 wt% SAPP. Moreover, mechanical...

We present the reactivity of four‐coordinate lutetium‐methanediide‐alkyl complexes 1 and 2 ((BODDI R )Lu (CH SiMe 3 ) (µ ‐CHSiMe )(THF) , = i Pr ( ), Et )). The reaction with N ‐diisopropylcarbodiimide PrN=C=N Pr) afforded a nucleophilic adduct through insertion three molecules into Lu‐µ or Lu‐CH bonds. In subsequent component reactions ‐dicyclohexylcarbodiimide (CyN=C=NCy) pyridine, different addition patterns led to completely products. Addition CyN=C=NCy first then pyridine complex...

In this paper, a flame-retardant, UV-cured coating was prepared on the fiber composites' (FC) surface via thiol-ene click reaction using pentaerythritol tetra(3-mercaptopropionate) (PETMP), triallyl cyanurate (TAC), and 2-hydroxyethyl methacrylate phosphate (PM-2). The synergistic effectiveness of phosphorus (P), nitrogen (N), sulfur (S) studied in detail by changing proportion these reactants. Sample S4(N3P2)6, with molar ratio N P elements 3:2, thiol vinyl groups 4:6 had highest LOI value...

Surface flame retarded jute/polypropylene composites (J/P/A) were prepared via a modified strategy: the mixture of PP and APP powder was spread over surface jute/PP nonwoven felts, then transformed into layer by hot pressing process. The retardancy thermal properties analyzed limit oxygen index (LOI), horizontal burning rate (HBR), thermogravimetric analyses (TGA), differential scanning calorimetry (DSC). We demonstrated that mechanical significantly improved compared with those obtained...

Developing convenient methods to introduce functional groups into syndiotactic polystyrene has gained increasing attention in recent years. Herein, we report the coordination polymerization of 4-(1-hexynyl)styrene (HES), 4-(phenylethynyl)styrene (PES), and 4-(trimethylsilyl)ethynylstyrene (TES) with half-sandwich scandium precursor C5Me4PhSc(CH2C6H4NMe2-o)2 (1) constrained-geometry-configuration (CGC) precursors C13H8CH2PySc(CH2SiMe3)2 (2, Py = C5H4N) 2,7-(tBu)2C13H8CH2PyLn(CH2SiMe3)2(THF)n...

Metabolizable lanthanum-coordination nanoparticles have been rationally designed and used as novel nano-sized radiosensitizers for solid tumor therapy.

Coordination polymerizations of 1-vinylnaphthalene (1VN), 2-vinylnaphthalene (2VN) and 6-methoxy-2-vinylnaphthalene (MVN) are carried out at room temperature by using the half-sandwich scandium precursor FluSiMe3 Sc(CH2 SiMe3 )2 (THF) (1) constrained geometry configuration rare-earth metal precursors FluCH2 PyLn(CH2 (THF)n [Flu = C13 H8 , Py C5 H4 N; Ln Sc (2a), n 0; Lu (2b), Y(2c), 1]. Atactic poly(1VN) perfect syndiotactic poly(2VN) poly(MVN) produced 2a-2c in a controlled way. Treatment...