Synthesis of sulfur-containing hyperbranched polymers by the bisthiolation polymerization of diethynyl disulfide derivatives
| Autor: | Yoshiki Chujo, Masaki Fujita, Tomokazu Umeyama, Akiko Nakahashi, Kensuke Naka, Eisuke Miyoshi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Diphenyl disulfide
chemistry.chemical_classification addition polymerization Polymers and Plastics Propynyl Organic Chemistry Ether hyperbranched Polymer Gel permeation chromatography chemistry.chemical_compound chemistry Polymerization Polymer chemistry Materials Chemistry Addition polymer heteroatom-containing polymers Triphenylphosphine |
| Zdroj: | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY. 45(16):3580-3587 |
| ISSN: | 0887-624X |
| Popis: | The reaction of phenyl propynyl ether and diphenyl disulfide in the presence of 1 mol % tetrakis(triphenylphosphine)palladium as a model reaction of the polymerization of bis(4-prop-2-ynyloxyphenyl) disulfide (1a) gave a Z-substituted dithioalkene. No E-substituted dithioalkene was formed in this reaction. The palladium-catalyzed bisthiolation polymerization of a diethynyl disulfide derivative, 1a, in benzene, was carried out to give a hyperbranched polymer (5a) containing a Z-substituted dithioalkene unit after reaction for 4 h at 70 °C. From the gel permeation chromatography analysis (chloroform, PSt standards), the number-average and weight-average molecular weights of 5a were found to be 8,100 and 57,000, respectively. The structure of 5a was confirmed by 1H and 13C NMR spectra. The obtained polymer was soluble in common organic solvents such as benzene, acetone, and CHCl3. Polymerization for more than 5 h gave insoluble products. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 3580–3587, 2007 |
| Databáze: | OpenAIRE |
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