GRAFT COPOLYMERIZATION OF METHACRYLOYL-L-GLUTAMIC ACID AND ITS DIETHYLESTER ONTO NATURAL BUBBER
(PART XII) STUDIES ON NATURAL RUBBER
1971 Volume 44 Issue 11 Pages 923-928
Details
1971 Volume 44 Issue 11 Pages 923-928
Graft copolymerization of methacryloyl-L-glutamic acid (M-Glu) and methacryloyl-L-diethyl-glutamate [M-Glu- (OEt) 2] onto natural rubber was inverstigated using benzoyl peroxide (BPO) as radical initiator under various conditions.
Graft copolymerization of M-Glu : 1) As a polymerization solvent a mixture of toluene and dioxane with the composition of 2 : 1 to 3 : 1 by volume was suitable. 2) The curve of the graft efficiency against the BPO concentration had a maximum. 3) The higher the concentrations of rubber and monomer, the better graft results were obtained. 4) The appropriate polymerization temperature was 80 to 100 °C.
Graft copolymerization of M-Glu- (OEt) 2 : 1) The curves for the degree of grafting and graft efficiency against the BPO concentration had maxima. 2) The degree of grafting increased rapidly with an increasing ratio of monomer to rubber. 3) The optimum polymerization temperature was 100 °C.
Some physico-chemical properties of the graft copolymer were determined and discussed.
