File(s) under permanent embargo
Thermal degradation kinetics and mechanism of epoxidized natural rubber
journal contribution
posted on 2013-01-01, 00:00 authored by C He, Y Wang, Y Luo, Lingxue KongLingxue Kong, Z PengThermal resistance is one of the most dominative properties for polymer materials. Thermal degradation mechanisms of epoxidized natural rubber (ENR) and NR are studied by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The results show that, the introduction of epoxy groups into the NR molecular main chain leads to a remarkable change in the degradation mechanism. The thermal stability of ENR is worse than that of NR. For the first thermooxidative degradation stage, the thermal decomposition mechanism of ENR is similar to that of NR, which corresponds to a mechanism involving one-dimensional diffusion. For the second stage, the thermal decomposition mechanism of ENR is a three-dimensional diffusion, which is more complex than that of NR. Kinetic analysis showed that activation energy (E?), activation entropy (?H) and activation Gibbs energy (?G) values are all positive, indicating that the thermooxidative degradation process of ENR is non-spontaneous.
History
Journal
Journal of polymer engineeringVolume
33Issue
4Pagination
331 - 335Publisher
Walter de Gruyter GmbH & Co. KGLocation
Berlin, GermanyPublisher DOI
ISSN
0334-6447eISSN
2191-0219Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2013, Walter de Gruyter GmbH & Co. KGUsage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC