The 1st International Conference on Cutting‐Edge Organic Chemistry in Asia
The 1st International Conference on Cutting‐Edge Organic Chemistry in Asia
Materials Literature
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Nanoindentation of biodegradable cellulose diacetate‐graft‐poly(L‐lactide) copolymers: Effect of molecular composition and thermal aging on mechanical properties
Abstract Nanoindentation of cellulose diacetate‐ graft ‐poly(lactide)s (CDA‐ g ‐PLLAs) synthesized by ring opening graft copolymerization of L ‐lactide in bulk onto the residual hydroxyl positions on CDA were conducted to investigate the effect of the molecular composition and thermal aging on mechanical properties an…
Nanosecond near-spinodal homogeneous boiling of water superheated by a pulsedCO2laser
The fast boiling dynamics of superheated surface layers of bulk water cavitating under near-spinodal conditions during nanosecond CO2 laser heating pulses was studied using contact broad-band photoacoustic spectroscopy. Characteristic pressure-tension cycles recorded by an acoustic transducer at different incident las…
Subsequent melting behavior of poly(butylene succinate) in its miscible blend with poly(vinyl phenol) crystallized nonisothermally from the melt
Abstract Biodegradable crystalline poly(butylene succinate) (PBSU) are miscible with amorphous poly(vinyl phenol) (PVPh). Neat PBSU and PBSU blended with PVPh show complex melting behavior after nonisothermal melt crystallization at constant cooling rates. Both neat and blended PBSU can show one, two, or three melting…
Control of the Surface Properties in Polymer Blends
We report on the preparation of amphiphilic diblock copolymers containing a hydrophilic segment, poly(acrylic acid)(PAA), and a polystyrene hydrophobic part. We analysed, by means of contact-angle measurements, how the hydrophilic segments usually bury themselves under the hydrophobic when exposed to air to reduce the…
Thermal and crystallization behaviors of polyethylene blends synthesized by binary late transition metal catalysts combinations
Abstract A series of reactor blends of linear and branched polyethylenes have been prepared, in the presence of modified methylaluminoxane, using a combination of 2,6‐bis[1‐(2,6‐dimethyphenylimino) pyridyl]‐cobalt(II) dichloride ( 1 ), known as an active catalyst for producing linear polyethylene, and [1,4‐bis(2,6‐dii…
Transmission properties of two shifted magnetoinductive waveguides
Abstract Transmission properties of magnetoinductive waves propagating in two coupled one‐dimensional metamaterial arrays are studied both experimentally and theoretically for the case when one of the arrays is shifted relative to the other one. Two different kinds of resonant metamaterial elements, split‐pipe and spi…
Strong nuclear contribution to the optical Kerr effect in niobium oxide containing glasses
The electronic and nuclear contributions to nonlinear optical properties of niobium oxide-based glasses have been measured using third-harmonic generation and pump-probe techniques. The results have been found to be in agreement with Hellwarth's model for niobium oxide $({\mathrm{Nb}}_{2}{\mathrm{O}}_{5})$ concentrati…
Dual Roles of Borax in Kinetics of Calcium Sulfate Dihydrate Formation
An additive is not exclusively retardant or promoter for a crystallization system. The kinetic studies of calcium sulfate dihydrate (CSD) crystal growth demonstrated that borax played dual roles in the reaction, which accelerated CSD formations at the low concentration levels but inhibited the crystal growth at the hi…
Diffusivity of ethylene and propylene in atactic and isotactic polypropylene: Morphology effects and free‐volume simulations
Abstract Diffusion coefficients of propylene and ethylene through particles and films of isotactic polypropylene (iPP) as well as through films of atactic, completely amorphous, polypropylene have been measured by gravimetric experiments. iPP particles with relatively similar crystallinities but with different particl…
Chitin sponge, extraction procedure from shrimp wastes using green chemistry
Abstract Chitin sponges were obtained from shrimp residues using green chemistry procedures. Partial deproteinization was performed by grinding fresh residues with water during 30 s in a food blender obtaining 39.3% d.b. partial deproteinized cephalothorax (PDC). Protein reduction in this step was 80%, with 49% of min…
Comparison of Physicomechanical Properties of NBR—PVC Blend Cured by Sulfur and Electron Beam
In this research, physicomechanical properties including tensile strength, elongation at break, hardness, resilience, and aging of acrylonitrile butadiene rubber—poly vinyl chloride (NBR—PVC) blend cured by sulfur and electron beam are investigated. The Taguchi method is employed in order to formulate the sulfur curin…
Uptake of aromatic solvents by polyethylene films
Abstract The sorption properties of the solvents benzene, toluene, and xylene in polyethylene films at 40, 60, and 80°C were investigated. The diffusion coefficient increased with an increase in the sorption temperature for the solvents and was highest for xylene and least for benzene. The inability of xylene to show…
Preparation, properties, and anticorrosion application of poly(methyl methacrylate)/montmorillonite nanocomposites coating on brass via solution polymerization
Abstract The aim of this study is to improve the anticorrosive property of 7Cu3Zn brass. The methyl‐methacrylate (MMA) monomer solution, modified with fluorine radical and silicone, was used as the polymer matrix to mix with the different percentages of modified montmorillonite (MMT) loading and to exfoliate the lamel…
Effect of polyisocyanate hardener on adhesive force of waterborne polyurethane adhesives
Abstract A series of waterborne polyurethane (WBPU)/hardener adhesives were obtained from mixing of WBPU containing different types of polyol as a soft segment with aliphatic and aromatic polyisocyanates hardeners. By characterization of allophanate and biuret bonds formed from the reaction of hardener NCO with uretha…
Effects of polymethylvinylsilicone oil with side tetraphenylphenyl groups on the radiation resistance of addition‐type silicone rubber
Abstract Polymethylvinylsilicone oil with side tetraphenylphenyl groups (called C 2 gum for short) as a low molecular additive was used in two kinds of addition‐type silicone rubber, polymethylvinyl silicone rubber and poly (dimethyl‐diphenyl) silicone rubber, and the radiation resistance of silicone rubbers obtained…
Sterilization and Strength of 70/30 Polylactide Cages
STUDY DESIGN: In vitro and in vivo studies on the degradation of 70/30 poly(L,DL-lactide) (PLDLLA) cages. OBJECTIVE: To evaluate the effect of e-beam and ethylene oxide sterilization on degradation and strength. SUMMARY OF BACKGROUND DATA: e-beam-sterilized PLDLLA cages were shown to maintain mechanical strength for a…
Polyurethane‐nanocomposite materials via in situ polymerization into organoclay interlayers
Abstract New nanocomposite materials based on polyurethane intercalated into organoclay layers have been synthesized via in situ polymerization. The syntheses of polyurethane–organoclay hybrid films were carried out by swelling the organoclay [12‐aminododecanoic acid montmorillonite] into different kinds of diols foll…
Morphology, crystallization, and mechanical properties of poly(ethylene terephthalate)/multiwall carbon nanotube nanocomposites via in situ polymerization with very low content of multiwall carbon nanotubes
Abstract So far, the reported content of multiwall carbon nanotubes (MWNTs) in polymer/MWNTs nanocomposites is usually above 0.1 wt %. In this article, we will report our work on the study of the morphology, crystallization, and mechanical properties of poly(ethylene terephthalate) (PET)/MWNTs nanocomposites prepared…
Cell‐Penetrating‐Peptide‐Coated Nanoribbons for Intracellular Nanocarriers
Eingewickelt: Nanobänder, die mit zellgängigen Peptiden (CPPs) bedeckt sind, können hydrophobe Gastmoleküle einschließen. Das Nanoassoziat wird mit hoher Effizienz in Säugerzellen aufgenommen und zeigt, abhängig von der Lösungsumgebung, eine selektive intrazelluläre Kompartimentierung.