不同拉伸比的形状记忆纤维的制备及性能研究

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

用冻胶法直接纺制热致感应型形状记忆纤维,并对初生纤维进行了拉伸处理,通过各种测试手段研究了不同拉伸比下纤维的吸水性能、热性能、动态力学性能以及形状记忆特性。结果表明,随着拉伸比的提高,纤维的断裂强度增大,吸水性降低,纤维的模量提高,且显示出更好的热致感应形状记忆性能。

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.