Results 1 to 10 of about 358,104 (333)

Co-existing morphologies of lamellae and double arrays of cylinders by A1BA2C tetrablock terpolymer

open access: yesGiant, 2023
Here, we observed, via small-angle X-ray scattering and transmission electron microscopy, co-existing morphologies of lamellae and cylinders by precisely tailoring the volume fraction of each block in polystyrene-b-polyisoprene-b-polystyrene-b-poly(2 ...
Hyeongkeon Yoon   +7 more
doaj   +1 more source

Ɛ-Caprolactone and Tetrahydrofuran Copolymerization with a Green Acid Activated Montmorillonite Catalyst: Reaction Optimization with the Taguchi Method [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2023
In this study, poly (ɛ-Caprolactone-co-Tetrahydrofuran) copolymer was synthesized using a green solid acid catalyst prepared with Montmorillonite clay (MMT). The prepared nanocatalyst was characterized by X-Ray Diffraction (XRD) analysis. The synthesized
Ali Mehrafarin, Sajjad Ebrahimi
doaj   +1 more source

Synthesis and characterization of alkyl-methacrylate-maleic anhydride copolymer for use as a biodiesel flow improver

open access: yesVietnam Journal of Science, Technology and Engineering, 2022
Methacrylic acid was esterified with four alcohols: 1-decanol, 1-dodecanol, 1-tetradecanol, and 1-cetanol. Afterwards, the obtained monomers were copolymerized with maleic anhydride.
Ngoc Lan Pham   +3 more
doaj   +1 more source

Morphological Diversity in Diblock Copolymer Solutions: A Molecular Dynamics Study

open access: yesColloids and Interfaces, 2023
Coarse-grained molecular dynamics simulations that incorporate explicit water-mediated hydrophilic/hydrophobic interactions are employed to track spatiotemporal evolution of diblock copolymer aggregation in initially homogeneous solutions.
Senyuan Liu, Radhakrishna Sureshkumar
doaj   +1 more source

Self-assembled pagoda-like nanostructure-induced vertically stacked split-ring resonators for polarization-sensitive dichroic responses

open access: yesNano Convergence, 2022
Stacked split-ring resonators (SSRR) arrays exhibiting polarization-sensitive dichroic responses in both visible and near-infrared wavelengths are realized over a centimeter-scale large area.
Sanghoon Kim   +9 more
doaj   +1 more source

Tumor Microenvironment–Responsive Polypeptide Nanogels for Controlled Antitumor Drug Delivery

open access: yesFrontiers in Pharmacology, 2021
Tumor microenvironment–responsive polypeptide nanogels belong to a biomaterial with excellent biocompatibility, easily adjustable performance, biodegradability, and non-toxic properties.
Yanhong Liu   +4 more
doaj   +1 more source

Potential Effects of Poloxamer 188 on Rat Isolated Brain Mitochondria after Oxidative Stress In Vivo and In Vitro

open access: yesBrain Sciences, 2021
Outcome after cerebral ischemia is often dismal. Reperfusion adds significantly to the ischemic injury itself. Therefore, new strategies targeting ischemia/reperfusion (I/R) injury are critically needed.
Johannes A. Pille, Matthias L. Riess
doaj   +1 more source

Olefin–Styrene Copolymers [PDF]

open access: yesPolymers, 2016
In this review are reported some of the most relevant achievements in the chemistry of the ethylene–styrene copolymerization and in the characterization of the copolymer materials. Focus is put on the relationship between the structure of the catalyst and that of the obtained copolymer.
GALDI, NUNZIA   +2 more
openaire   +2 more sources

Antifoaming Agent for Lubricating Oil: Preparation, Mechanism and Application

open access: yesMolecules, 2023
In the process of using lubricating oil, it is inevitable that bubbles will be produced, which can not only accelerate the oil’s oxidation and shorten the oil change cycle but also reduce its fluidity and lubricity, aggravate the wear of mechanical parts
Chenfei Ren   +6 more
doaj   +1 more source

Composite membranes for proton exchange membrane fuel cells based on methyl methacrylate-co-maleimide /phosphotungstic acid [PDF]

open access: yesشیمی کاربردی روز, 2018
Poly(methyl methacrylate-co-nitrophenyl maleimide) (MMA-co-NMI) and poly(methyl‌‌‌‌ methacrylate-co-hydroxyphenyl maleimide)‌‌‌‌‌ (MMA-co-HMI) copolymers were synthesized using free radical polymerization of MMA with a new MI monomer containing phenyl ...
zahra seidzadeh   +3 more
doaj   +1 more source

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