| 摘要 |
An improved method of making a PAN copolymer is provided which includes providing a first reaction mixture including polyacrylonitrile dissolved in an aqueous solution containing a thiocyanate salt; providing a second reaction mixture including a metal catalyst dissolved in an aqueous reactive solvent; mixing the first and second reaction mixtures in a container to form a master reaction mixture; heating the master reaction mixture via a heating element to maintain a predetermined reaction temperature range for a time sufficient for completion of a predetermined level of hydrolysis of polyacrylonitrile, wherein the reaction temperature (T<SUB>r</SUB>) is represented by the formula T<SUB>r</SUB>=T<SUB>a</SUB>+T<SUB>e </SUB>wherein T<SUB>a </SUB>is the temperature resulting from the amount of added heat and T<SUB>e </SUB>is the temperature increase from the heat generated by the exothermic reaction. |
