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Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Comparison of the Effects of Organoclay Loading on the Curing and Mechanical Properties of Organoclay-Filled Epoxidised Natural Rubber Nanocomposites and Organoclay-Filled Natural Rubber Nanocomposites | Journal of Physical Science Vol. 20 2 37-59 2009 37 Comparison of the Effects of Organoclay Loading on the Curing and Mechanical Properties of Organoclay-Filled Epoxidised Natural Rubber Nanocomposites and Organoclay-Filled Natural Rubber Nanocomposites R. N. Hakim and H. Ismail Polymer Division School of Materials and Mineral Resources Engineering Universiti Sains Malaysia 14300 Nibong Tebal Pulau Pinang Malaysia Corresponding author hanafi@eng.usm.my Abstract Comparison between epoxidised natural rubber ENR and natural rubber NR filled with organoclay in terms of curing characteristics tensile properties thermal stability and morphology were studied. Organoclay loadings from 2 to 10 phr loading were used in this study. The nanocomposites were compounded using laboratory-sized two roll mills and cured at 150 C. The results indicate that the tensile strength and tensile modulus reached a maximum at 8 phr of organoclay but elongation at break and thermal stability increased with increasing organoclay loading. Overall results show that organoclay-filled ENR nanocomposites exhibited shorter processing time and higher tensile properties than organoclay-filled NR nanocomposites. The enhanced properties were due to the homogenous dispersion of individual silicate layers in the ENR matrix which is shown in the X-ray diffraction XRD scanning electron microscopy SEM and transmission electron microscopy TEM results. Keywords organoclay epoxidised natural rubber natural rubber nanocomposites Abstrak Perbandingan di antara getah asli terepoksida ENR dan getah asli NR terisi tanah liat organo dari segi ciri-ciri pematangan sifat tensil kestabilan terma dan morfologi telah dikaji. Pembebanan tanah liat organo daripada 2 hingga 10 bsg telah digunakan di dalam kajian ini. Komposit nano telah disebatikan menggunakan mesin penggulung kembar berskala makmal dan dimatangkan pada 150 insert darjah disini C. Keputusan menunjukkan kekuatan tensil dan modulus tensil mencapai nilai .
