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Polymerization of monomer films of triazine dithiols on a copper surface
Author(s) -
Mori Kunio,
Oishi Yoshiyuki,
Miyashita Tokuji,
Matsuda Minoru
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990280304
Subject(s) - polymer chemistry , monomer , polymerization , radical , induction period , benzoyl peroxide , nitroxide mediated radical polymerization , chemistry , polymer , alkyl , copper , radical polymerization , kinetic chain length , peroxide , materials science , photochemistry , organic chemistry , catalysis
On heating films of long‐chain alkylamino‐1,3,5‐triazine‐2,4‐dithiols, substituted with unsaturated groups in the 6‐position, on copper plates in air, the films become partially insoluble in benzene. The polymerization rate and monomer conversion increased with temperature above 80°C and with time. At low temperatures, an induction period was observed. The detailed behavior was dependent upon the number and length of the alkyl chains. Films with high packing density polymerized more slowly. In the presence of azobis(isobutyro)nitrile (AIBN) and benzoyl peroxide (BPO), the rate and conversion increased and the induction period disappeared. The optimum concentration of initiators was approximately 0.0025 mol% of monomer. The polymerization of the films was initiated by oxygen activated with copper, or by radicals derived from AIBN and BPO. It is proposed that the growth of polymer proceeded mainly by the addition of thiyl radicals to unsaturated groups, the insoluble polymers being formed by the coupling of thiyl radicals.