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Journal of Environmental Waste Management and Recycling | Volume 1
March 05-06, 2018 | London, UK
Recycling & Waste Management
5
th
International Conference on
B
isphenol-A/anilinebasedpolybenzoxazine (abbreviatedas
poly(BA-a)) modified with different types of dianhydride,
i.e. benzophenone-3,3’,4,4’-tetracarboxylic dianhydride
(BTDA) and pyromellitic dianhydride (PMDA) is attractive for
the applications that require high thermal and mechanical
properties with fire resistant characteristics. Therefore,
thermal stability and thermal degradation kinetics may be
significant to production and application. The purpose of the
present work is to investigate the changes that take place
during the thermal degradation of the poly(BA-a)/BTDA and
the poly(BA-a)/PMDA copolymers. The activation energy and
the reaction mechanism of the degradation processes of the
copolymers presented by thermogravimetric analysis under
argon atmosphere were estimated from non-isothermal
kinetic results. The derivative thermogravimetric analysis
(DTG) thermograms of the poly(BA-a)/BTDA copolymer
exhibited five stages of thermal degradation reaction, while
the four stages of thermal degradation reaction of the
poly(BA-a)/PMDA copolymer were observed. The activation
energy values obtained by composite kinetic method of five
stages for the poly(BA-a)/BTDA copolymer and four stages
for the poly(BA-a)/PMDA copolymer are 135-284 kJ/mol and
131-240 kJ/mol, respectively. Furthermore, the degradation
reaction mechanism by integral master plot method of the
stages of the poly(BA-a)/BTDA and the poly(BA-a)/PMDA
copolymers was accounted by random nucleation model
with one nucleus on the individual particle (F1)
e:
chanchira@g.swu.ac.thThermal degradation of dianhydride-modified polybenzoxazine
Chanchira Jubsilp
1
and
Sarawut Rimdusit
2
1
Srinakharinwirot University, Thailand
2
Chulalongkorn University, Thailand