Effect of the acrylonitrile-to-gelatine ratio in the reaction mixture on the structure and properties of gelatine-polyacrylonitrile grafted copolymerfibres

The effect of variable ratios of acrylonitrile to gelatine in the reaction mixture on the structure and the moisture absorption characteristics and st rength properties of fibres made of polyacrylonitrile-gelatine grafted copo lymer has been examined. It has been found that with an increase in the rat io in question the moisture absorption at 100% RH and the tenacity of the m odified fibres also increase, while their water retention is decreased. The moisture absorption characteristics of the fibres depend mainly on the cha racter of the porous structure formed during the fibre spinning process. Th e most favourable, in terms a fibre properties, ratio of acrylonitrile to g elatine in the reaction mixture has been established.