02293nam a2200265 a 4500 vtls000057831 KUKTEM 20251114204449.0 111221t2010 my a f m 001 0 eng d THE0004181(Local) 201905141729 farhana 201112210807 ida UMP TP156.P6 K36 2010 rs Bc. Kamarul Izhan Soh Graft copolymerization of methyl methacrylate onto rice husk / Kamarul Izhan Soh Kuantan, Pahang : UMP, 2010 xiv, 50 p. : ill. ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering ) -- Universiti Malaysia Pahang - 2010 Bibliography : p. [38]-42 Graft copolymerization of methyl methacrylate (MMA) onto Rice Husk (RH) was synthesized with a fiber length less than 45 μm. The graft copolymerization was carried out under a nitrogen atmosphere by a free radical initiation in aqueous medium. Hydrogen peroxide and ferrous ions were used as a redox initiator/cocatalyst system. The PMMA homopolymer that formed during the reaction was removed from the grafted copolymers by soak with acetone for 24hr. The percentage of grafting was found to be dependent on the amount of monomer; temperature and amount of hydrogen peroxide were investigated. The optimum conditions for amount of monomer, reaction temperature and amount of hydrogen peroxide were 46.94mmol, 50oC and 5.88mmol, respectively. The highest percentages of grafting and grafting efficiency were 10.8% and 77%, respectively, under optimum condition. After removal of homopolymer, the graft copolymerization (grafted fiber) was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy. The presence peak around 1666 cm-1 in the FTIR of the graft RH provides strong evidence of present MMA in the RH fibers. SEM reveals that the surface of the original RH fiber become rough and contained grooves and the surface of the fiber was homogenously covered by PMMA after graft copolymerization. Graft copolymers Crosslinking (Polymerization) Crosslinked polymers 0 0 0 1 10000 10000 2019-09-04 0 TP156.P6 K36 2010 rs Bc. 0000061064 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 5695 | TP156.P6 K36 2010 rs Bc. 0000061065 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 2481 2487 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*6502*9992