Chemical modification of chitin by grafting with polystyrene using ammonium persulfate initiator.
Chitin was successfully grafted with polystyrene by free radical mechanism using ammonium persulfate (APS) initiator. The reaction was carried out in aqueous medium. The effect of pH, chitin:monomer weight ratio, APS, reaction time and reaction temperature were investigated. The results showed that the optimum conditions for grafting of polystyrene were found as follows: pH 7, chitin:monomer weight ratio of 1:3, 0.4 g of APS, reaction temperature of 60 °C and reaction time 2 h. The graft copolymer was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA) and differential scanning electron microscopy (DSC). Gel permeation chromatography (GPC) analysis carried out on the hydrolyzed graft copolymer showed that the Mn and Mw were 6.3395×10(4) g/mol and 1.69283×10(5) g/mol, respectively, with polydispersity index of 2.7.
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia. Electronic address: ahmedy@kimia.fs.utm.my.
Ahmedy
A
Abu Naim
Abdulganiyu
A
Umar
Mohd Marsin
MM
Sanagi
Noraimi
N
Basaruddin
D000645:Ammonium Sulfate / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D002686:Chitin / Q000031:analogs & derivatives / Q000737:chemistry*; D002850:Chromatography, Gel; D006863:Hydrogen-Ion Concentration; D011137:Polystyrenes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry
D001672:Biocompatible Materials; D011137:Polystyrenes; D002686:Chitin; C031276:ammonium peroxydisulfate; D000645:Ammonium Sulfate
Ammonium persulfate; Chitin; Graft copolymer; Polystyrene; Radical polymerization