Abstract
Homogeneous graft copolymerization of methyl methacrylate onto ethyl cellulose using radical initiators such as ammonium persulphate, potassium persulphate and benzoyl peroxide was carried out in benzene/dimethylsulphoxide (1/1 v/v) mixed solvent system. The grafting yield was determined as functions of the polymerization temperature and the concentrations of monomer, ethyl cellulose and initiator. Different techniques were used for confirming the presence of polymethyl methacrylate grafted chains such as IR, TLC and NMR. The efficiency of grafting methyl methacrylate onto ethyl cellulose with ammonium persulphate and potassium persulphate was studied in different solvent systems. The power of solvents for increasing the grafting yield was found as follows: chloroform > toluene > benzene. The highest overall rates for copolymerization of methyl methacrylate onto ethyl cellulose using ammonium persulphate and potassium persulphate initiators were determined as 0.2% min −1 and 0.08% min −1, respectively. Benzoyl peroxide was found to be an unsuitable initiator for grafting methyl methacrylate onto ethyl cellulose. A Trommsdorf effect was observed in certain systems. The mechanism of grafting reaction of methyl methacrylate onto ethyl cellulose is discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.