A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,...A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,000 to 140,000 determined by GPC.The composition of terpolymers could be controled by adjusting the proportion of monomer.展开更多
Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by ()1H-NMR.()...Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by ()1H-NMR.()13C-NMR can be used to assume the connection between guar gum and Hydroxypropyl and evaluate the length of hydroxypropyl which was 2~8.展开更多
Additives CK Ⅰ,CK Ⅱ for heat resistant insulating paper were prepared.The application conditions of the agents were optimized.The agents prepared in this paper showed good heat resistant activitis.
文摘A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,000 to 140,000 determined by GPC.The composition of terpolymers could be controled by adjusting the proportion of monomer.
文摘Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by ()1H-NMR.()13C-NMR can be used to assume the connection between guar gum and Hydroxypropyl and evaluate the length of hydroxypropyl which was 2~8.
文摘Additives CK Ⅰ,CK Ⅱ for heat resistant insulating paper were prepared.The application conditions of the agents were optimized.The agents prepared in this paper showed good heat resistant activitis.