Results 21 to 30 of about 72,832 (304)

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

open access: yesBulletin of Chemical Reaction Engineering & Catalysis, 2016
A new and efficient catalyst of Na-Montmorillonite (Na+-MMT) was employed in this paper for α-methylstyrene (AMS) cationic polymerization. Maghnite clay, obtained from Tlemcen Algeria, was investigated to remove heavy metal ion from wastewater. “Maghnite-
Moulkheir Ayat   +2 more
doaj   +1 more source

Observation of eliminative cationic polymerization within van der Waals clusters [PDF]

open access: yes, 1991
We report the first observation of eliminative cationic polymerization within van der Waals (vdW) clusters following electron impact ionization at pressures of 10−8 Torr.
El-Shall, M. Samy, Schriver, K. E.
core   +2 more sources

The Cationic Ring-Opening Polymerization of Tetrahydrofuran with 12-Tungstophosphoric Acid

open access: yesMolecules, 2010
The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 ºC was catalyzed by H3PW12O40·13H2O as solid acid catalyst. The effect of the proportions of acetic anhydride and catalyst, reaction time and support on the polymerization ...
Hassan Al-Shahri   +2 more
doaj   +1 more source

Anionic Polymerization Using Flow Microreactors

open access: yesMolecules, 2019
Flow microreactors are expected to make a revolutionary change in chemical synthesis involving various fields of polymer synthesis. In fact, extensive flow microreactor studies have opened up new possibilities in polymer chemistry including cationic ...
Yusuke Takahashi, Aiichiro Nagaki
doaj   +1 more source

Injectable polypeptide hydrogels via methionine modification for neural stem cell delivery. [PDF]

open access: yes, 2018
Injectable hydrogels with tunable physiochemical and biological properties are potential tools for improving neural stem/progenitor cell (NSPC) transplantation to treat central nervous system (CNS) injury and disease.
Czechanski, A   +6 more
core   +1 more source

Investigation of cationic ring-opening polymerization of 2-oxazolines in the “green” solvent dihydrolevoglucosenone

open access: yesBeilstein Journal of Organic Chemistry, 2023
For about the last ten years, poly(2-oxazoline)s have attracted significant attention as potential material for biomedical applications in, e.g., drug delivery systems, tissue engineering and more.
Solomiia Borova, Robert Luxenhofer
doaj   +1 more source

Novel Carbazole Skeleton-Based Photoinitiators for LED Polymerization and LED Projector 3D Printing

open access: yesMolecules, 2017
Radical chemistry is a very convenient way to produce polymer materials. Here, an application of a particular photoinduced radical chemistry is illustrated. Seven new carbazole derivatives Cd1–Cd7 are incorporated and proposed as high performance near-UV
Assi Al Mousawi   +10 more
doaj   +1 more source

3D printing of optical materials: an investigation of the microscopic properties [PDF]

open access: yes, 2018
3D printing technologies are currently enabling the fabrication of objects with complex architectures and tailored properties. In such framework, the production of 3D optical structures, which are typically based on optical transparent matrices ...
Arinstein, A.   +6 more
core   +2 more sources

Combinatorial biomaterials discovery strategy to identify new macromolecular cryoprotectants [PDF]

open access: yes, 2020
Cryoprotective agents (CPAs) are typically solvents or small molecules, but there is a need for innovative CPAs to reduce toxicity and increase cell yield, for the banking and transport of cells.
Gibson, Matthew I.   +4 more
core   +2 more sources

Synthesis of Epoxy Methacrylate Resin and Coatings Preparation by Cationic and Radical Photocrosslinking

open access: yesMolecules, 2021
This work involves the synthesis of hybrid oligomers based on the epoxy methacrylate resin. The EA resin was obtained by the modification of industrial-grade bisphenol A-based epoxy resin and methacrylic acid has been synthesized in order to develop ...
Paulina Bednarczyk   +3 more
doaj   +1 more source

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