The effects of heating mode (conventional and microwave) on the kinetics of isothermal polymerization of MMA composite materials were investigated. Isothermal kinetics curves at temperature range from 343 K to 363 K for both conventional (CH) and microwave heating (MWH) were determined. It was found that the polymerization of MMA composite materials was kinetically elementary reaction for both CH and MWH. The kinetics of CH polymerization can be described by the model of phase-boundary controlled process (contracting volume), whereas the kinetics of MWH polymerization can be described by the model of first-order chemical reaction. The kinetics parameters (E-a and In A) of the polymerization under microwave heating are lower than for conventional heating. The established decreases in the activation energy and pre-exponential factor under the MWH compared to the CH is explained with the increase in the energy of ground vibrational level of the C-O valence vibrations (v = 987 cm(-1)) in m...ethyl methacrylate molecule and with the decrease in its anharmonicity factor which is caused with the selective resonant transfer of energy from the energetic reservoir to the oscillators in methyl methacrylate molecules.
TY - JOUR
AU - Spasojević, Pavle
AU - Jovanović, Jelena
AU - Adnađević, Borivoj
PY - 2013
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2392
AB - The effects of heating mode (conventional and microwave) on the kinetics of isothermal polymerization of MMA composite materials were investigated. Isothermal kinetics curves at temperature range from 343 K to 363 K for both conventional (CH) and microwave heating (MWH) were determined. It was found that the polymerization of MMA composite materials was kinetically elementary reaction for both CH and MWH. The kinetics of CH polymerization can be described by the model of phase-boundary controlled process (contracting volume), whereas the kinetics of MWH polymerization can be described by the model of first-order chemical reaction. The kinetics parameters (E-a and In A) of the polymerization under microwave heating are lower than for conventional heating. The established decreases in the activation energy and pre-exponential factor under the MWH compared to the CH is explained with the increase in the energy of ground vibrational level of the C-O valence vibrations (v = 987 cm(-1)) in methyl methacrylate molecule and with the decrease in its anharmonicity factor which is caused with the selective resonant transfer of energy from the energetic reservoir to the oscillators in methyl methacrylate molecules.
PB - Elsevier Science Sa, Lausanne
T2 - Materials Chemistry and Physics
T1 - Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites
EP - 890
IS - 2-3
SP - 882
VL - 141
DO - 10.1016/j.matchemphys.2013.06.019
ER -
@article{
author = "Spasojević, Pavle and Jovanović, Jelena and Adnađević, Borivoj",
year = "2013",
abstract = "The effects of heating mode (conventional and microwave) on the kinetics of isothermal polymerization of MMA composite materials were investigated. Isothermal kinetics curves at temperature range from 343 K to 363 K for both conventional (CH) and microwave heating (MWH) were determined. It was found that the polymerization of MMA composite materials was kinetically elementary reaction for both CH and MWH. The kinetics of CH polymerization can be described by the model of phase-boundary controlled process (contracting volume), whereas the kinetics of MWH polymerization can be described by the model of first-order chemical reaction. The kinetics parameters (E-a and In A) of the polymerization under microwave heating are lower than for conventional heating. The established decreases in the activation energy and pre-exponential factor under the MWH compared to the CH is explained with the increase in the energy of ground vibrational level of the C-O valence vibrations (v = 987 cm(-1)) in methyl methacrylate molecule and with the decrease in its anharmonicity factor which is caused with the selective resonant transfer of energy from the energetic reservoir to the oscillators in methyl methacrylate molecules.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites",
pages = "890-882",
number = "2-3",
volume = "141",
doi = "10.1016/j.matchemphys.2013.06.019"
}
Spasojević, P., Jovanović, J.,& Adnađević, B.. (2013). Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 141(2-3), 882-890.
https://doi.org/10.1016/j.matchemphys.2013.06.019
Spasojević P, Jovanović J, Adnađević B. Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites. in Materials Chemistry and Physics. 2013;141(2-3):882-890.
doi:10.1016/j.matchemphys.2013.06.019 .
Spasojević, Pavle, Jovanović, Jelena, Adnađević, Borivoj, "Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites" in Materials Chemistry and Physics, 141, no. 2-3 (2013):882-890,
https://doi.org/10.1016/j.matchemphys.2013.06.019 . .
