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Materiale Plastice
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Materiale Plastice (Mater. Plast.), Year 2013, Volume 50, Issue 2,





Corina Andronescu, Paul Octavian Stănescu, Sorina Alexandra GArea, Horia Iovu Influence of Curing Protocol of Benzoxazine Monomer based on Aromatic Diamines against the Degradation Behaviour of the Resulted Polybenzoxazines


Abstract:
Two curing protocols were used to polymerize a difunctional benzoxazine monomer based on 4,4'-diamino diphenyl methane. The thermal degradation behaviour of both resulted materials (named PBZ_190 and PBZ_250) was investigated by thermogravimetric analysis coupled with mass spectrometry (TGA/MS), Fourier transform infrared spectroscopy (FT-IR) and X-Ray photoelectron spectroscopy (XPS). The dependence of activation energy on conversion was established using Kissinger-Akahira-Sunose isocoversional method. Degradation of PBZ_250 starts at lower temperatures compared with PBZ_190 but its residual char is higher than for PBZ_190. The degradation of PBZ_250 exhibits a lower activation energy at conversion a <0.3, and higher values than PBZ_190 for a >0.3. Keywords: polybenzoxazine, degradation kinetics, thermogravimetric analysis (TGA)



Issue: 2013 Volume 50, Issue 2
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