Naslov
Organic-inorganic hybrids based on poly(methyl methacrylate) and polysilsesquioxanes

Autori
Ivanković, Marica ; Brnardić, Ivan ; Ivanković, Hrvoje ; Huskić, Miroslav ; Gajović, Andreja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
XXI. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Trogir, Hrvatska, 19.04.2009. - 22.04.2009

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
poly(methyl methacrylate) ; silsesquioxane ; sol-gel

Sažetak
New organic-inorganic hybrids based on poly(methyl methacrylate), PMMA, and polysilsesquioxane structures (polyhedral oligomeric silsesquioxane, POSS, and/or ladder like structures) were prepared by in situ bulk polymerization. The inorganic phase was generated from 3-glycidyloxypropyltrimethoxysilane, GLYMO, via sol-gel chemistry. Poly(oxypropylene)diamine was used as an epoxy opening agent, as basic catalyst for GLYMO condensation and as PMMA crosslinking agent. Chemical reactions in the systems of different methyl methacrylate , MMA/GLYMO molar ratio were studied by Fourier transform infrared analysis. The high degree of conversion of methoxysilyl groups to -Si-O-Si- linkages was confirmed by 29Si NMR. Hybrid morphology was studied by scanning electron microscopy, SEM. Hybrid with cca. 3 wt % of inorganic phase (calculated as SiO1, 5) showed a discrete microstructure while hybrids with higher amount of inorganic phase (cca. 5 and 7 wt. %) showed characteristic interpenetrating polymer networks, IPN, morphology. Inorganic phase formed as a result of GLYMO hydrolysis and condensation in the sol-gel process influences the glass transition temperature of PMMA. The hybrids have much better thermal stability than PMMA and showed excellent solvent resistance.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

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