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Poly (phenylmethylsilane) obtained by electrochemical reduction in a divided cell containing a polymeric membrane
Author(s) -
Dabek Roman,
Cervantes Jorge,
Zizumbo Arturo
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991480111
Subject(s) - electrochemistry , materials science , tetrahydrofuran , polymer chemistry , solvent , membrane , electrolyte , polymer , anode , hexamethylphosphoramide , supporting electrolyte , perchlorate , nuclear chemistry , electrode , inorganic chemistry , chemistry , ion , organic chemistry , biochemistry , composite material
The electrochemical synthesis of poly(phenylmethylsilane) was carried out in a divided cell using a polymeric anion‐exchange membrane. The solution contained phenylmethydichlorosilane (PhMeSiCl 2 ), mixed solvent tetrahydrofuran + hexamethylphosphoramide, with tetrabutylammonium perchlorate as support electrolyte. The electrodes were stainless steel as the cathode, stainless steel as the sacrificial anode or platinum as the resistant anode. Poly(phenylmethylsilane) was obtained in yields from 1.5 to 4.5 % from phenylmethyldichlorosilane concentrations equal or higher than 1 M. The number‐average molecular mass M n of poly(phenylmethylsilane) was in the range from 5600 to 9500. A monomodal molecular weight distribution was obtained with a polydipersity Index of 2. The spectra of 1 H, 13 C, 29 Si MMR and IR were determined. From the 29 Si NMR analysis, the poly(phenylmethylsilane) showed a clear difference in the tacticity related to the chemical synthesis of the same polymer. The UV spectra showed a strong absorption in a 331 to 335 nm characteristic for the poly(phenylmethylsilane).