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Please use this identifier to cite or link to this item: https://ptsldigital.ukm.my/jspui/handle/123456789/499441
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dc.contributor.advisorIbrahim Abdullah, Professor Dr.-
dc.contributor.authorHassan Ghalib Abdulla Salleh (P42600)-
dc.date.accessioned2023-10-13T09:32:00Z-
dc.date.available2023-10-13T09:32:00Z-
dc.date.issued2012-06-12-
dc.identifier.otherukmvital:74645-
dc.identifier.urihttps://ptsldigital.ukm.my/jspui/handle/123456789/499441-
dc.descriptionInterest in products of polymer blends is ever growing and the polymer blends are becoming of major significance. This study is concerned with overcoming the brittleness, improving the impact strength of PS and enhancing the poor processability of the conducting polypyrrole. Most of the study deals with the preparation and characterization of electrically-conductive natural rubber/polystyrene/polypyrrole (NR/PS/PPy) ternary polymer blends. The blends exhibited a combination of good processability, impact strength, and flexibility besides a rubbery nature with desirable electrical properties. The PPy nanoparticles were synthesized by oxidative polymerization at 0 °C and 25 °C. The effect of oxidants (ferric sulfate (Fe2(SO4)3) and ammonium persulfate (NH4)2S2O8) and dopants (Sodium dodecyl sulfate (SDS), Sodium dodecyl benzene sulphonate (NaDBS) and cetyltrimethyl ammonium bromide (CTAB)), on the polymerization process was investigated. The NR/PS blends with various weight ratios (i.e., NR/PS= 20/80, 40/60, 50/50, 60/40 and 80/20 wt.%) were prepared by emulsion dispersion pathway. Blends of NR/PPy and PS/PPy were also prepared in the same way for comparison purposes. The morphological observation supports a good mixing level of the NR/PS blend as the reduced domain size of the dispersed phase was observed. Incorporation of PPy nanoparticles into the NR, PS, and NR/PS matrices was confirmed by Fourier transform infrared spectroscopy (FTIR). Field emission scanning electron microscopy (FE-SEM) analysis showed that PPy particles were well dispersed in NR, PS, and NR/PS matrices with diameters of less than 100 nm. The conductivity and thermal stability of the blends increased with increasing PPy content (calculated based on elemental analysis). NR/PS/PPy blends showed highest conductivity values of 8.9 ×10-8-2.89×10-4 S cm-1, as measured by frequency response analyzer. Meanwhile conductivity values of the NR/PPy and PS/PPy blends ranged from 1.50×10-8-1.25×10-5 S cm-1 and 2.31×10-7-2.18×10-4 S cm-1, respectively. The electrical conductivity, morphology, thermal and mechanical properties (tensile strength and modulus) of NR/PS/PPy blends vary with variation of dopants, SDS, NaDBS and CTAB respectively employed in preparation of NR/PS/PPy blends. The mechanical properties (tensile strength and modulus) of NR/PS/PPy blends increase with increasing content of PPy nanoparticles, up to around 28 wt% and thereafter decrease at higher PPy content.,Ph.D-
dc.language.isoeng-
dc.publisherUKM, Bangi-
dc.relationFaculty of Science and Technology / Fakulti Sains dan Teknologi-
dc.rightsUKM-
dc.subjectSynthesis-
dc.subjectPolypyrrole nanoparticle-
dc.subjectNatural rubber-
dc.subjectPolystyrene prepared-
dc.subjectEmulsion polymerization-
dc.subjectPolymers-
dc.titleSynthesis of polypyrrole nanoparticle and its blends with natural rubber and polystyrene prepared via emulsion polymerization-
dc.typeTheses-
dc.format.pages167-
dc.identifier.callnoQD381.S239 2012-
dc.identifier.barcode000267-
Appears in Collections:Faculty of Science and Technology / Fakulti Sains dan Teknologi

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