Abstract
The partial carbamoylethylation of polyvinyl alcohol fibers with acrylamide was studied, using the aqueous solution or curing method. Suitable reaction conditions are as follows;
For the aqueous solution method, -
AM/PVA mol ratio 0.6, AM concentration 30g/l, Na2SO4 25%, Na3PO4 2%, 60°C, 4hr.
For the curing method, -
composition of impregnating solution; AM 35%, NaOH 7%
curing condition; 120°C, 5min.
Under both conditions, the, value of the degree of substitution was 2_??_4 mol%, for the unheated and heat-treated PVA fibers.
From the improvement of elastic recovery by the formalization of partial carbamylethylated fibers, a certain degree of intermolecular cross-linking is deduced. Also, The Mannich reaction was observed when the amine treatment of partial carbamoylethylated fibers was caried out.
The affinities for some dyestuffs of these after-treated fibers are improved, and especially good result is obtained for dimethylamine-treated and then formalizee fibers.
