Preparation and properties of thermoresponsive shape memory fiber with different drawing ratio

A novel kind of thermoresponsive shape memory fiber was prepared by mixing the P(SA-co-AA) copolymers of stearyl acrylate (SA),and acrylic acid (AA),with PVA polyvinyl alcohol through chemically crosslinking after spinning and drawing.The molecular structure,thermomechanical properties and shape memory behaviors of mixed fibers with different drawing ratio were investigated.It was found that the rupture strength of fibers increased and the swelling ratio of them decreased with the increasing of drawing ratio.The crystal melting temperature increased and the module of fibers increased.The drawed P(SA-co-AA)/PVA fibers also showed a good shape memory effect,and the shape reversion ratio increased with the increasing drawing ratio.