Poly o6 preparation and properties of biodegradable

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Unformatted text preview: lour blends film was studied using optical microscopy (OM). It was found that the PVOH/rambutan waste flour blends film become darker with increasing of RWF content due to agglomeration of rambutan waste flour granules, which reduced tensile strength of PVOH/rambutan waste flour blends. It was also found that a high percentage of water uptakes was obtained afte r 24 hours immersion and increased with increase in rambutan waste flour content. This was attributed to the hydrophilic nature of the PVOH and rambutan waste flour. 221 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia POLY-O7 MECHANICAL, MORPHOLOGICAL AND SWELLING PROPERTIES OF HALLOYSITE NANOTUBES (HNTs) FILLED NATURAL RUBBER NANOCOMPOSITES S. Siti Zuliana, I. Hanafi and A. Zulkifli School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, 14300 Pulau Pinang, Malaysia E-mail: miss_ctos86@yahoo.com Halloysite nanotubes (HNTs) filled natural rubber (NR) nanocomposites with various filler loading (0, 10, 20, 30 and 40 phr) were prepared by using an external mixer, two roll mills. The mechanical properties of HNTs/NR nanocomposites were tested by using Instron Testing Machine. The optimum tensile strength of NR/HNTs nanocomposites is obtained at 20 phr of HNTs. then the tensile strength decreased gradually at higher HNTs loading but still higher than NR gum compound. When HNT loading increased, the elongations of break (Eb) of HNTs/NR nanocomposites was decreased while stress at 100 and 300 % elongation (M100 and M300) showed vice versa. The same trend as modulus property was obtained for swelling test, the solvent uptake by rubber nanocomposites after immersion i n toluene for 72 hours. The characterization of tensile fracture surface of sample is done by using scanning electron microscope (SEM). SEM images proved that HNTs show good dispersion in NR matrix which verified the good result for tensile strength of HNTs/NR nanocomposites for 20 phr of HNT while at highe...
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