Modification of deproteinised natural rubber by graft-copolymerisation of methyl methacrylate


Citation

Nurul Hayati Y., . and Kawahara S., . and Mazam M. S., . Modification of deproteinised natural rubber by graft-copolymerisation of methyl methacrylate. pp. 97-100. ISSN 1511-1768

Abstract

Natural Rubber (NR) latex was deproteinised by incubation with urea in the presence of sodium dodecyl sulfate (SDS). Urea deproteinised natural rubber (U-DPNR) latex was graft-copolymerised with Methyl Methacrylate (MMA) at a monomer feed of 5 10 15 and 20 wt on rubber. The monomer content monomer conversion and grafting efficiency of the copolymerisation reaction were determined. The resulting graft copolymers were characterised by FT-IR spectroscopy and morphology observed using a transmission electron microscope (TEM). The monomer content conversion and grafting efficiency of NR-graft-PMMA U-DPNR-graft-PMMA and E-DPNR-graft-PMMA were compared as well. The results showed that MMA feed of 15 wt on rubber initiator concentration of 6.6 10 5 mol/g-rubber and reaction temperature at 30C were found to be suitable conditions to obtain high MMA content high conversion and high grafting efficiency. The highest grafting efficiency was about 80 at 15 wt on rubber feed of MMA for U-DPNR-graft-PMMA and E-DPNR-graft-PMMA.


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Abstract

Natural Rubber (NR) latex was deproteinised by incubation with urea in the presence of sodium dodecyl sulfate (SDS). Urea deproteinised natural rubber (U-DPNR) latex was graft-copolymerised with Methyl Methacrylate (MMA) at a monomer feed of 5 10 15 and 20 wt on rubber. The monomer content monomer conversion and grafting efficiency of the copolymerisation reaction were determined. The resulting graft copolymers were characterised by FT-IR spectroscopy and morphology observed using a transmission electron microscope (TEM). The monomer content conversion and grafting efficiency of NR-graft-PMMA U-DPNR-graft-PMMA and E-DPNR-graft-PMMA were compared as well. The results showed that MMA feed of 15 wt on rubber initiator concentration of 6.6 10 5 mol/g-rubber and reaction temperature at 30C were found to be suitable conditions to obtain high MMA content high conversion and high grafting efficiency. The highest grafting efficiency was about 80 at 15 wt on rubber feed of MMA for U-DPNR-graft-PMMA and E-DPNR-graft-PMMA.

Additional Metadata

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Item Type: Article
AGROVOC Term: Natural rubber
AGROVOC Term: Urea
AGROVOC Term: Methylation
AGROVOC Term: Polymers
AGROVOC Term: Latex
AGROVOC Term: grafting
AGROVOC Term: Polymerization
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:28
URI: http://webagris.upm.edu.my/id/eprint/23064

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