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Cross‐linking of poly(methyl methacrylate) by oxozirconate and oxotitanate clusters
Author(s) -
Trimmel Gregor,
Moraru Bogdan,
Gross Silvia,
Di Noto Vito,
Schubert Ulrich
Publication year - 2001
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 - 10.1002/1521-3900(200110)175:1<357::aid-masy357>3.0.co;2-d
Subject(s) - methacrylate , methyl methacrylate , polymer , polymer chemistry , polymerization , acrylate , materials science , thermal stability , depolymerization , methyl acrylate , radical polymerization , chemistry , copolymer , organic chemistry , composite material
Radical polymerization of methyl methacrylate with 0.5‐2 mol% of the (meth)acrylate‐substituted oxozirconium and oxotitanium clusters Zr 6 (OH) 4 O 4 (OMc) 12 (OMc = methacrylate), Zr 4 O 2 (OMc) 12 , Ti 6 O 4 (OEt) 8 (OMc) 8 and Ti 4 O 2 (OPr i ) 6 (OAcr) 6 (OAcr = acrylate) results in an efficient cross‐linking of the organic polymers. The obtained inorganic‐organic hybrid polymers exhibit a higher thermal stability due to inhibited depolymerization reactions. Contrary to undoped poly(methyl methacrylate), the cluster cross‐linked polymers are insoluble but swell in organic solvents. The solvent uptake upon swelling decreases with an increasing amount of polymerized cluster. The impedance spectra of PMMA doped with various proportions of Zr 4 O 2 (OMc) 12 show that the capacitance of the polymers decreases with an increasing proportion of the cluster. The polymer doped with 2 mol% of Zr 4 O 2 (OMc) 12 shows an increase in conductivity to 0.9·10 −7 S·cm −1 at 74°C.