【摘要】 研究了熔纺聚丙烯腈 (MPPAN )纤维的拉伸及热定型工艺 ,并应用 X光衍射、取向、应力 -应变等方法对拉伸丝及定型丝的结晶性能、机械性能和沸水收缩性进行了表征 ,结果表明 :两种 MPPA N纤维都可以进行热水拉伸 ,但需严格控制拉伸温度 ;纤维拉伸以后 ,结晶度和机械性能均得到提高 ;其中AN含量为 81.6 %的 MPPAN拉伸丝可在 14 0℃以下 (以 130℃为佳 )干热定型 ,定型丝的性能和定型方式有关。更多还原

【Abstract】 The drawing and heat setting of melt processable PAN(MPPAN) fibers were discussed.The results of WAXD,stress-strengh curve and etc.show that both two yarns can be drawn under certain temperature in hot water.Their mechanical properties and crystalline degree have been improved after drawing. 1 # MPPAN drawn yarn can be dry heat set under 140℃(preferable 130℃).Properties of setting yarn was affected by the setting condition.更多还原