Performance of Irradiated and Crosslinked Ethylene Vinyl Acetate-Waste Tire Dust Blend
The influences of electron beam irradiation, addition of crosslinking agents and the combination of irradiation and crosslinking agents on the properties of Ethylene Vinyl Acetate/Waste Tire Dust (EVA/WTD) blends were investigated. Trimethylolpropane triacrylate (TMPTA) and tripropyleneglycol dia...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/7330/1/FK_2009_36a.pdf |
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| Summary: | The influences of electron beam irradiation, addition of crosslinking agents and
the combination of irradiation and crosslinking agents on the properties of
Ethylene Vinyl Acetate/Waste Tire Dust (EVA/WTD) blends were investigated.
Trimethylolpropane triacrylate (TMPTA) and tripropyleneglycol diacrylate
(TPGDA) were chosen as crosslinking agents. Blends were prepared by melt
mixing in an internal mixer, Haake Rheomix Polydrive R600/610 at
temperature and rotor speed of 140oC and 50 rpm, respectively. Studies in
processing conditions were carried out in order to ensure the enhancement of
EVA/WTD blend properties through irradiation. Results revealed that the
optimum processing conditions were at 140oC mixing temperature, with 10 min
of blending time and at 90/10 (EVA/WTD) blend ratio. The dynamic
mechanical properties showed two glass transition temperatures that indicates incompatible blends. The introduction of electron beam irradiation on
EVA/WTD at different doses, 50, 100, 150 and 200 kGy has enhanced the
irradiation-induced crosslinking. Irradiation-induced crosslinking has increased
with the increase in irradiation dose and lead to the improvement in tensile
properties, compatibility, dynamic and thermal mechanical properties of the
blends. The incorporation of TMPTA and TPGDA as crosslinking agents lead
to the improvement of tensile strength, thermal and dynamic mechanical
properties. A decline in tensile strength and dynamic properties of the
EVA/WTD blend at above 50 kGy irradiation dose in the presence of TMPTA
was observed. Such a decrease attributed to the embrittlement of the blend due
to high extent of irradiation-induced crosslinking. TPGDA was found to serve
the optimum tensile and dynamic mechanical properties upon EB irradiation of
EVA/WTD blends. |
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