Thermal degradation of poly(isobornyl acrylate) and its copolymer with poly(methyl methacrylate) via pyrolysis mass spectrometry

• Published in: Journal of analytical and applied pyrolysis Vol. 100; pp. 17 - 25
• Main Authors: Ozlem, Suriye, Aslan-Gürel, Evren, Rossi, Rene M., Hacaloglu, Jale
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2013
• Subjects: acrylic acid; carbon dioxide; composite polymers; Copolymer; crosslinking; Direct pyrolysis mass spectrometry; mass spectrometry; methanol; Poly(isobornyl acrylate); Poly(methyl methacrylate); polyacrylic acid; polymethylmethacrylate; pyrolysis; Thermal degradation; Poly(isobornyl acrylate); Poly(methyl methacrylate); Copolymer; Direct pyrolysis mass spectrometry; Thermal degradation
• ISSN: 0165-2370; 1873-250X
• DOI: 10.1016/j.jaap.2012.10.024

► Evolution of isoborylene during the degradation of PIBA generates poly(acrylic acid). ► Poly(acrylic acid) decomposes by trans-esterification reactions eliminating H2O. ► Intermolecular interactions between PIBA and PMMA are effective. In this work, the thermal degradation characteristics of poly(isobornyl acrylate) (PIBA), and its copolymer with PMMA, P(MMA-co-IBA) were investigated via direct pyrolysis mass spectrometry. Thermal degradation behavior of poly(isobornyl methacrylate) (PIBMA) was also studied for a better understanding of thermal degradation mechanism of PIBA. For both PIBA and PIBMA, γ-H transfer from the isobornyl ring to the carbonyl group was predominantly effective in thermal degradation. As a consequence of evolution of isoborylene, poly(acrylic acid) was produced. Trans-esterification reactions due to intermolecular interactions lead to evolution of H2O. Upon loses of CO2 and CO crosslinked units with higher thermal stabilities were generated. In case of P(MMA-co-IBA), intermolecular interactions between PIBA and PMMA chains were detected. Based on evolution of methanol, a trans-esterification reaction between the MMA and acrylic acid units generated by loss of isobornylene from PIBA chains was proposed.