Unique effects of microwave heating on polymerization kinetics of poly(methyl methacrylate) composites
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 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.
Keywords:
Polymers / Composite materials / Heat treatment / Irradiation effectsSource:
Materials Chemistry and Physics, 2013, 141, 2-3, 882-890Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
DOI: 10.1016/j.matchemphys.2013.06.019
ISSN: 0254-0584
WoS: 000323806600040
Scopus: 2-s2.0-84881136902
Institution/Community
Inovacioni centarTY - 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 . .