In this paper,the regularities of graft copolymerization of n butyl methacrylate onto starch by using chromic acid as an initiator were repoted.Many effects on the grafting percentage and the grafting efficiency perce...In this paper,the regularities of graft copolymerization of n butyl methacrylate onto starch by using chromic acid as an initiator were repoted.Many effects on the grafting percentage and the grafting efficiency percentage were discussed including the initiator concentration,the monomer concentration the reacting time and temperature.The results show that the grafting percentage was higher,when monomer concentration and initiator concentration were 0.6mol/L and 5×10 -3 mol/L at 30℃ for 2h respectively.展开更多
The optimum conditions of grafting copolymerization reaction of acrylic acid(AA) onto polypropylene(PP) fiber was studied by using benzoyl peroxide(BPO) as initiator.The primary and secondary sequences of the grafting...The optimum conditions of grafting copolymerization reaction of acrylic acid(AA) onto polypropylene(PP) fiber was studied by using benzoyl peroxide(BPO) as initiator.The primary and secondary sequences of the grafting copolymerization reaction conditions was analysed. The results showed that grafting copolymerization reaction was greatly influenced by the temperature,reaction time, concentration of BPO and that of AA in the primary and secondary role as the above sequence. The optimum reaction conditions of gaining higher exchange capacity for the weak acidic cation-exchange fiber are as follows: the grafting temperature 80 ℃, the reaction time 7 h, the concentration of BPO 2% and AA 80%.展开更多
文摘In this paper,the regularities of graft copolymerization of n butyl methacrylate onto starch by using chromic acid as an initiator were repoted.Many effects on the grafting percentage and the grafting efficiency percentage were discussed including the initiator concentration,the monomer concentration the reacting time and temperature.The results show that the grafting percentage was higher,when monomer concentration and initiator concentration were 0.6mol/L and 5×10 -3 mol/L at 30℃ for 2h respectively.
文摘The optimum conditions of grafting copolymerization reaction of acrylic acid(AA) onto polypropylene(PP) fiber was studied by using benzoyl peroxide(BPO) as initiator.The primary and secondary sequences of the grafting copolymerization reaction conditions was analysed. The results showed that grafting copolymerization reaction was greatly influenced by the temperature,reaction time, concentration of BPO and that of AA in the primary and secondary role as the above sequence. The optimum reaction conditions of gaining higher exchange capacity for the weak acidic cation-exchange fiber are as follows: the grafting temperature 80 ℃, the reaction time 7 h, the concentration of BPO 2% and AA 80%.
