نتایج جستجو برای: ionic polymerization

تعداد نتایج: 75735  

Journal: :Bulletin of the Chemical Society of Japan 1968

Journal: :Journal of molecular catalysis. B, Enzymatic 2009
Bilge Eker Dmitri Zagorevski Guangyu Zhu Robert J Linhardt Jonathan S Dordick

Soybean peroxidase (SBP) was used to catalyze the polymerization of phenols in room-temperature ionic liquids (RTILs). Phenolic polymers with number average molecular weights ranging from 1200 to 4100 D were obtained depending on the composition of the reaction medium and the nature of the phenol. Specifically, SBP was highly active in methylimidazolium-containing RTILs, including 1-butyl-3-met...

Journal: :Science China. Materials 2021

Ionic skins that demonstrate great advantages in the mechanical properties and multiple sensory capabilities are regarded as an attractive candidate to mimic functions of human skin. However, skin is vulnerable be damaged under long-time sunlight irradiation, most current ionic also lack a protection against harmful ultraviolet infrared lights. Herein, this work develops multifunctional based o...

Journal: :Chemcatchem 2022

Two zinc complexes bearing NHC ligands were synthesized and fully characterized by NMR spectroscopy. Their behavior in the Ring-Opening Polymerization (ROP) of lactides was investigated under several conditions reaction. They showed to be efficient initiators, producing polylactides with molecular weights depending on cocatalysts. Microstructural analysis poly(rac-LA) 1H spectroscopy revealed a...

Journal: :Journal of the mechanical behavior of biomedical materials 2017
Y J Li D Barthès-Biesel A-V Salsac

The Glubran 2 cyanoacrylate glue is a liquid embolic agent used to block blood vessels endovascularly. Typically mixed with an iodized oil (Lipiodol) for visualization under X-ray, it polymerizes when in contact with blood and tissues owing to the presence of ions and proteins. The objective of the study is to determine the influence of plasma proteins in the polymerization reaction. A triggeri...

Journal: :Macromolecules 2012
Bokyung Kim Christopher N Lam Bradley D Olsen

The use of ionic interactions to direct both protein templating and block copolymer self-assembly into nanopatterned films with only aqueous processing conditions is demonstrated using block copolymers containing both thermally responsive and pH responsive blocks. Controlled reversible addition-fragmentation chain-transfer (RAFT) polymerization is employed to synthesize poly(N-isopropylacrylami...

Journal: :Environmental Health Perspectives 1975
H K Reimschuessel

The term, synthetic polymer, denotes a macromolecule composed of simple structural units and usually derived from monomers by a process of polymerization. This process is possible only if certain chemical, thermodynamical, and mechanistic conditions are satisfied. The monomer must have a functionality of two or higher. The polymerization process must be characterized by a negative free energy c...

Journal: :Chemical communications 2009
Avijit Goswami Taichi Ito Naoko Saino Kouki Kase Chikashi Matsuno Sentaro Okamoto

A NiCl(2)-6H(2)O/Zn reagent with a 2-aryliminomethylpyridine ligand catalyzed cyclization/polymerization of 1,6-diynes to yield mainly the corresponding poly(1,3-butadienylene) compounds, whereas NiBr(2)-3H(2)O/Zn with the use of 3-(2-(2-methoxyethoxy)-ethyl)-1-methyl-1H-imidazol-3-ium bromide as a ligand converted 1,6-diynes to the corresponding annulated 1,3,5,7-cyclooctatetraenes in a biphas...

2007
M. F. Holovko

Recent development of the multi-density integral equation approach and its application to the statistical mechanical modelling of a different type of association and clusterization in liquids and solutions are reviewed. The effects of dimerization, polymerization and network formation are discussed. The numerical and analytical solutions of the integral equations in the multi-density formalism ...

Journal: :The Journal of biological chemistry 1983
L S Tobacman E D Korn

The polymerization kinetics of rabbit skeletal muscle actin was studied by following the increase in fluorescence of tracer amounts of actin conjugated to N-pyrenyl iodoacetamide. The observed polymerization kinetics could be precisely fit by numerical integration of equations describing a nucleation-elongation process. Under all conditions tested, the rate of nucleation was proportional to the...

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