A linear relationship between the tensile, thermal and gas barrier properties of mape modified rubber toughened nanocomposites
The nanocomposites with the application of compatibilizer agent were developed aiming to enhance the tensile, crystallization as well as gas barrier properties. Nanocomposites based on high density polyethylene (HDPE), ethylene propylene diene monomer (EPDM) and organophilic montmorillonite (OMMT...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IIUM Press
2010
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/5679/1/a_linear_relationship_between_the_tensile%2C_thermal_and_gas_barrier_properties_of_mape.pdf http://irep.iium.edu.my/5679/ http://www.iium.edu.my/ejournal/home2010/index.php/iiumej/article/view/114/72 |
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| Summary: | The nanocomposites with the application of compatibilizer agent were
developed aiming to enhance the tensile, crystallization as well as gas barrier properties.
Nanocomposites based on high density polyethylene (HDPE), ethylene propylene diene
monomer (EPDM) and organophilic montmorillonite (OMMT) clays were prepared via
melt compounding followed by compression molding. The addition of clay as well as
compatibilizer agent (maleic anhydride polyethylene (MAPE)) considerably improved
the tensile properties of nanocomposites systems. The largest improvement in
mechanical and thermal properties occurred at clay loading levels of 4% (2-8 wt %) with
MAPE system. Interestingly, the increased in tensile properties also resulted in
improvement in thermal and gas barrier properties. Based on the optimum finding in
tensile test, differential scanning calorimeter analysis (DSC) and gas barrier analysis
were evaluated at 4 vol% of OMMT. DSC analysis revealed that the gas barrier property
of nanocomposite was influenced by the crystalline percentage of nanocomposite. Along
with crystalline percentage, the crystallization temperature, Tc and melting temperature,
Tm were also improved with the presence of OMMT and MAPE agent. The d-spacings of
the clay in nanocomposites was monitored using x-ray diffraction (XRD) and the extent
of delamination was examined by transmission electron microscope (TEM). The wide
angle of XRD patterns showed the increased of interplanar spacing, d of clay layers,
indicating enhanced compatibility between polymer matrix and OMMT, with the aids of
MAPE agent. TEM photomicrographs illustrated the mixed intercalated and partial
exfoliated structures of the nanocomposites with OMMT and MAPE agent. |
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