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Title:	Sintesis dan kajian kekonduksian terma polipirola berdop NaDBS dan nanokomposit polipirola berdop / getah kloroprena
Authors:	Siti Syahirah Mohd Rusli (P43412)
Supervisor:	Rusli Bin Daik, Prof Madya Dr
Keywords:	getah kloroprena Conducting polymers Synthesis
Issue Date:	8-Jul-2011
Description:	Polipirola (PPy) berdop surfaktan telah disintesis pada suhu 0 °C melalui kaedah pempolimeran oksidatif kimia menggunakan natrium dodesilbenzenasulfonat (NaDBS) sebagai surfaktan dan ferum sulfat sebagai oksidan. Sintesis polipirola berdop NaDBS disahkan melalui spektroskopi FTIR dan analisis unsur CHNS-O. Nanokomposit polipirola berdop NaDBS /getah kloroprena (CR) disediakan menggunakan kaedah sebaran koloid dalam empat komposisi dengan nisbah berat PPy berdop kepada CR 20:80, 30:70, 40:60 dan 50:50. Nanokomposit PPy berdop/CR 30:70, 40:60 dan 50:50 dipilih untuk penyediaan nanokomposit PPy berdop/CR/bahan seramik silikon karbida, boron nitrida dan silikon nitrida menggunakan kaedah sebaran koloid. Hasil pemeriksaan menggunakan FESEM menunjukkan saiz zarah PPy berdop yang diperoleh adalah dalam julat 60.3 nm sehingga 105.0 nm, manakla bagi komposit PPy/CR saiz zarah adalah dalam julat 90.0 nm sehingga 140.5 nm. Saiz zarah PPy dalam komposit PPy/CR/bahan seramik pula adalah dalam julat 26.9 nm sehingga 135.9 nm. Kekonduksian terma PPy berdop ialah 0.465 W/mK. Nilai kekonduksian terma meningkat dengan peningkatan kandungan PPy berdop dalam nanokomposit. Nilai kekonduksian terma bagi kandungan PPy berdop yang paling tinggi (50:50) ialah 0.395 W/mK manakala bagi kandungan PPy berdop yang paling rendah (80:20) ialah 0.326 W/mK. Komposit PPy berdop/CR/SiC 50/50/5% menunjukkan nilai kekonduksian terma yang paling tinggi iaitu 0.702 W/mK. Komposit dengan bahan pengisi yang tersebar dengan sekata menunjukkan nilai kekonduksian terma yang tinggi.,The surfactant doped polypyrrole (PPy) was synthesized at 0 °C by chemical oxidative polymerization using sodium dodecylbenzenesulfonate (NaDBS) and ferric sulphate as the surfactant and oxidant, respectively. The synthesis of doped polypyrrole was confirmed by FTIR spectroscopy and CHNS-O elemental analysis. Doped polypyrrole (PPy)/chloroprene rubber (CR) nanocomposites were prepared via colloidal dispersion in four compositions with weight ratio of doped PPy to CR of 20:80, 30:70, 40:60 and 50:50. Doped PPy/CR nanocomposites with the composition of 30:70, 40:60 and 50:50 were chosen to prepare the doped PPy/CR/ceramic material nanocomposites namely silicon carbide, boron nitride and silicon nitride via colloidal dispersion. Observarian by FESEM indicated that the particle size of doped PPy is in the range of 60.3 nm to 105.0 nm, whereas the particle size of doped PPy in PPy/CR composites is in the range of 90.0 nm to 140.5 nm. PPy/CR/ceramic materials showed the particle size of doped PPy in the range of 26.9 nm to 135.9 nm. The thermal conductivity for doped PPy is 0.465 W/mK. The value of thermal conductivity of the nanocomposites is increased with increasing doped PPy content. The thermal conductivity of the nanocomposites with the highest PPy content (50:50) is 0.395 W/mK, whereas the composite with lowest doped PPy content (80:20) showed a thermal conductivity of 0.326 W/mK. The PPy/CR/SiC 50/50/5% composite showed the highest thermal conductivity which is 0.702 W/mK. Composites with homogeneously dispersed filler showed high thermal conductivity.,Master/Sarjana
Pages:	104
Call Number:	QD382.C66S585 2011 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Science and Technology / Fakulti Sains dan Teknologi

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