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The kinetics of the in situ polymerization of glycidyl methacrylate in wood using dynamic mechanical measurements
Author(s) -
Balaba W. M.,
Subramanian R. V.
Publication year - 1986
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760260809
Subject(s) - glycidyl methacrylate , polymerization , monomer , polymer chemistry , uranyl nitrate , materials science , acetone , kinetics , uranyl , bulk polymerization , solvent , catalysis , radical polymerization , chemistry , polymer , organic chemistry , composite material , physics , quantum mechanics , metallurgy , uranium
The in situ polymerization of glycidyl methacrylate in wood, in the presence of uranyl nitrate, (UN), and/or 2,2′‐azo‐bis‐isobutyronitrile, (AIBN), has been investigated in the temperature range 55°‐72°C. The course of the polymerization reaction was followed by measurement of tan 5 in an automated Rheovibron viscoelastometer. The kinetics, studied by applying the Guggenheim method to the data, showed the polymerization to be first order whether catalyzed by UN or initiated by AIBN. The activation energy ( E α ) for AIBN‐initiated polymerization was 121 kJ/mol, and was unaffected by varying monomer concentration in acetone. On the other hand, E α for the UN‐catalyzed polymerization was found to be 59.1 and 73.5 kJ/mol respectively for the neat and 50 percent monomer concentration reaction mixture. The enhancement in E α is attributed to the complexatton of the dioxouranium (VI) ion in the presence of solvent acetone, with consequent reduction in catalytic activity.