Effect of chemical modification of eggshells powder filled low density polyetylene composites
Eggshells powder filled low density polyethylene (LDPE/ESP) composites were studied. The composites were prepared by using Z-blade mixer at 1800C using a rotor speed of 50 rpm for 6 minutes. Sample of composites were compression moulded, in an electrically heated Hydraulic press. Hot press proced...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Universiti Malaysia Perlis
2011
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| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my/xmlui/handle/123456789/12906 |
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| Summary: | Eggshells powder filled low density polyethylene (LDPE/ESP) composites were
studied. The composites were prepared by using Z-blade mixer at 1800C using a rotor
speed of 50 rpm for 6 minutes. Sample of composites were compression moulded, in an
electrically heated Hydraulic press. Hot press procedures involved preheating at 1800C for
4 min followed by compression for 2 min at the same temperature and subsequent cooling
under pressure for 2 min. It was found that the tensile strength and elongation at break for
the composites decreased with the increasing filler loading. Young’s modulus for the
composites increases with the increasing filler loading. Then the composites were modified
with isophthalic acid (LDPE/ESPI), ethylene diamine-co-isophthalic acid (LSPE/ESPM) and
polyethylene-grafted-maleic anhydride (LDPE/ESPPEMAH). It was found that improvement in
interfacial adhesion has enhanced the tensile strength and water absorption resistance of
LDPE/modified eggshells powder composites compare to LDPE/unmodified eggshells
powder composites (LDPE/ESP).Its also increased thermal stability and percent of
crystallinity of composites. Better interfacial adhesion between LDPE and eggshells
powder are responsible for the improvement of mechanical properties of LDPE/modified
eggshells powder composites, as evident by scanning electron microscopy (SEM) on
tensile fracture surface of the composites. |
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