Results 11 to 20 of about 61,010 (276)

Effect of Increased Ionic Liquid Uptake via Thermal Annealing on Mechanical Properties of Polyimide-Poly(ethylene glycol) Segmented Block Copolymer Membranes

open access: yesMolecules, 2021
Proton exchange membranes (PEMs) suffer performance degradation under certain conditions—temperatures greater than 80 °C, relative humidity less than 50%, and water retention less than 22%.
Gokcen A. Ciftcioglu, Curtis W. Frank
doaj   +1 more source

Nanostructure Engineering via Intramolecular Construction of Carbon Nitride as Efficient Photocatalyst for CO2 Reduction

open access: yesNanomaterials, 2021
Light-driven heterogeneous photocatalysis has gained great significance for generating solar fuel; the challenging charge separation process and sluggish surface catalytic reactions significantly restrict the progress of solar energy conversion using a ...
Muhammad Sohail   +10 more
doaj   +1 more source

Ring-opening copolymerization (ROCOP): synthesis and properties of polyesters and polycarbonates [PDF]

open access: yes, 2015
Controlled routes to prepare polyesters and polycarbonates are of interest due to the widespread application of these materials and the opportunities provided to prepare new copolymers. Furthermore, ring-opening copolymerization may enable new poly(ester–
Brooks, R   +5 more
core   +1 more source

Estudio de copolimerización injerto del acrilato de butilo sobre almidón empleando sistema iniciador redox

open access: yesQuímica Nova, 2014
The mixture of synthetic and natural materials yields a material with improved physical-chemical properties. One way of obtaining this kind of material is through graft copolymerization.
Alfredo Carlos Martinez-Arellano   +5 more
doaj   +1 more source

Copolymers Derived from Two Active Esters: Synthesis, Characterization, Thermal Properties, and Reactivity in Post-Modification

open access: yesMolecules, 2022
Copolymers with two distinguished reactive repeating units are of great interest, as such copolymers might open the possibility of obtaining selective and/or consequent copolymers with different chemical structures and properties.
Thi Phuong Thu Nguyen   +5 more
doaj   +1 more source

Methylenelactide: vinyl polymerization and spatial reactivity effects

open access: yesBeilstein Journal of Organic Chemistry, 2016
The first detailed study on free-radical polymerization, copolymerization and controlled radical polymerization of the cyclic push–pull-type monomer methylenelactide in comparison to the non-cyclic monomer α-acetoxyacrylate is described. The experimental
Judita Britner, Helmut Ritter
doaj   +1 more source

Study on ethylene/1-hexene copolymerization catalyzed by α-diimine nickel catalysts with different ligands

open access: yesMagnetic Resonance Letters, 2021
The structure of polyolefin has an important influence on its performance and application. Ethylene/1-hexene copolymerization is one of the important ways to control the structure of the polyolefin.
Yusheng Xing   +6 more
doaj   +1 more source

Synthesis of biodegradable polyesteramides with pendant functional groups [PDF]

open access: yes, 1992
Morpholine-2,5-dione derivatives having substituents with benzyl-protected carboxylic acid, benzyloxycarbonyl-protected amine and p-methoxy-protected thiol groups, respectively, were prepared in 29-58% yield by cyclization of the corresponding N-[(2RS ...
Dijkstra, Pieter J.   +2 more
core   +3 more sources

Efficient sequestration of boron from liquid phase by amidoxime-functionalized poly(acrylonitrile-co-acrylic acid): experimental and modelling analyses

open access: yesWater Science and Technology, 2022
This study aims to produce amidoxime-modified poly(acrylonitrile-co-acrylic acid) using an optimized method and to investigate the performance of amidoxime-modified poly(acrylonitrile-co-acrylic acid) on the adsorption of boron ions in batch operations ...
Abel Adekanmi Adeyi   +4 more
doaj   +1 more source

Influence of Sulfur-Containing Diamino Acid Structure on Covalently Crosslinked Copolypeptide Hydrogels. [PDF]

open access: yes, 2018
Biologically occurring non-canonical di-α-amino acids were converted into new di-N-carboxyanhydride (di-NCA) monomers in reasonable yields with high purity.
Deming, Timothy J   +4 more
core   +1 more source

Home - About - Disclaimer - Privacy