AI Summary & Key Takeaways
AI InsightAccording to the Kissinger-Akahira-Sunose process, the activation energy of the first step was 114,40 kJ/mol and activation energy of the second step was 231,13 kJ/mol.
📌 3 Key Takeaways
Abstract
In this study, poly (methyl methacrylate-co-methacrylic acid) (poly(MM-co-MA)) was synthesized at 70 OC in the presence of benzoyl peroxide, methacrylic acid and methyl methacrylate monomers by free radical addition polymerization method. The obtained structure of poly (methyl methacrylate-co-methacrylic acid) was characterized by GPC(Gel permeation chromatography), FT-IR(Fourier transform infrared spectroscopy) and 1H-NMR(Nuclear magnetic resonance) analyses. (Mn=39800 g/mol PDI: 2.04) Radical polymerization yield was obtained at 42%. The thermal decomposition kinetics of poly (methyl methacrylate-co-methacrylic acid) was also investigated by the thermogravimetric process. The thermal degradation of the poly(MM-co-MA) was observed in two steps. Kinetic parameters were computed by the Flynn-Wall-Ozawa process and the Kissinger process. The first step and second step activation energy was determined to be 108,34 kJ / mol, 253,41 kJ / mol according to the Flynn-Wall-Ozawa process. According to the Kissinger-Akahira-Sunose process, the activation energy of the first step was 114,40 kJ/mol and activation energy of the second step was 231,13 kJ/mol.
Özet
Bu çalışmada, poli (metil metakrilat-ko-metakrilik asit) (poli (MM-ko-MA))) 70 ° C'de benzoil peroksit , metakrilik asit ve metil metakrilat monomerleri varlığında serbest radikal polimerizasyon yöntemiyle sentezlenmiştir. Poli (metil metakrilat-ko-metakrilik asit) yapısı, GPC, FT-IR ve 1H-NMR metotları analizleri ile karakterize edildi. Mn = 39800 g / mol PDI: 2.04 Radikal polimerizasyon verimi% 42 olarak elde edildi. Poli (metil metakrilat-ko-metakrilik asit) 'in termal bozunma kinetiği ayrıca araştırılmıştır. Poli (MM-ko-MA) 'nın ısıl bozulması iki aşamada gözlenmiştir. Kinetik parametreler Flynn-Wall-Ozawa işlemi ve Kissinger metodu ile hesaplandı. Birinci adım ve ikinci adımın aktivasyon enerjisinin Flynn-Wall-Ozawa metoduna göre 108,34 kJ / mol, 253,41 kJ / mol olduğu belirlenmiştir. Kissinger-Akahira-Sunose metoduna göre, ilk adımın aktivasyon enerjisi 114,40 kJ / mol ve ikinci adımın aktivasyon enerjisi 231,13 kJ / mol bulunmuştur.