PP含量及纺丝条件对SEBS/PP共混料性能及可纺性的影响  

Effect of PP content and spinning conditions on properties and spinnability of SEBS/PP blends

作　　者：陈婷 王栋[2] 莫笑君 梁红文 张爱民[2] CHEN Ting;WANG Dong;MO Xiaojun;LIANG Hongwen;Zhang Aimin(SINOPEC Hunan Petrochemical Co.,Ltd.,Yueyang 414014;State Key Laboratory of Polymer Materials Engineering,Institute of Polymer Research,Sichuan University,Chengdu 610065)

机构地区：[1]中石化湖南石油化工有限公司,湖南岳阳414014 [2]四川大学高分子研究所高分子材料工程国家重点实验室,四川成都610065

出　　处：《合成纤维工业》2023年第4期43-47,共5页China Synthetic Fiber Industry

基　　金：国家重点研发项目(2017YFC1104801);四川大学、中国石油化工股份有限公司项目(421098-3)。

摘　　要：以低相对分子质量苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)和聚丙烯(PP)为原料,制得SEBS/PP共混料,然后通过熔融纺丝制备非织造布用SEBS/PP弹性纤维,研究了PP含量及纺丝条件对SEBS/PP共混料热力学行为、力学性能、流变性能及可纺性的影响。结果表明:SEBS/PP共混料与PP的熔程均在150~170℃,SEBS组分没有影响PP组分的结晶行为;随着PP含量的增大,SEBS/PP共混料的拉伸强度上升,断裂伸长率下降,经5次加载-卸载循环拉伸后残余应变仍小于50%,具有较好的回弹性能;在温度170℃下,不同PP含量SEBS/PP共混料的表观黏度相差不大;当纺丝温度为170℃,卷绕速度为导丝盘速度的4倍,SEBS与PP质量比为7030时,纺制的弹性纤维的直径为40μm,拉伸强度为62.20 MPa,断裂伸长率为320%,具有良好的拉伸性能和回弹性能。Styrene-ethylene-butylene-styrene block copolymer/polypropylene(SEBS/PP)blends were prepared from low-relative molecular mass SEBS and PP and then was produced into SEBS/PP elastic fiber for nonwovens by melt spinning.The effects of PP content and spinning conditions on the thermodynamic behavior,mechanical properties,rheological properties and spinnability of SEBS/PP blends were studied.The results showed that the melting ranges of SEBS/PP blend and PP were both 150-170℃,and the SEBS component did not affect the crystallization behavior of PP component;the tensile strength of SEBS/PP blend increased and the elongation at break decreased with the increase of PP content,however,the residual strain was still lower than 50%after 5 loading-unloading cycles of stretching,indicating a good rebound performance;the apparent viscosity of SEBS/PP blends with different PP contents did not differ significantly at 170℃;and the winding speed was 4 times of the guide disk speed when the spinning temperature was 170℃,and the produced elastic fibers had the diameter of 40μm,the tensile strength of 62.20 MPa and the elongation at break of 320%,indicating a good tensile and rebound properties,when the mass ratio of SEBS to PP was 7030.

关 键 词：苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物 聚丙烯 熔融纺丝 弹性纤维 

分 类 号：TQ342.89[化学工程—化纤工业]