埃洛石纳米管对熔纺HDPE纤维结晶行为和晶片扭曲的影响

摘要

High density polyethylene (HDPE)/halloysite nanotubes (HNTs) composite fibers were fabricated by melt spinning method. The effect of HNTs on nonisothermal crystallization behavior of HDPE was studied by differential scanning calorimetry (DSC). The effect of take-up velocity and adding HNTs on the lamellar twisting of HDPE in melt spun HDPE/HNTs composite fibers during melt spinning was researched by two-dimension wide angle X-ray diffraction (2D-WAXD). The results show that HNTs can serve as a nucleating agent, shifting on-set crystallization temperature and maximum crystallization temperature to a higher end and shortening half crystallization time during nonisothermal crystallization. Lamellar twisting of HDPE is restricted with the increase in the take-up velocity and the mass percentage of HNTs.%采用熔融纺丝法制备了高密度聚乙烯（HDPE）/埃洛石纳米管（HNTs）复合纤维。利用差示扫描量热法研究了HNTs对HDPE基体非等温结晶行为的影响，利用二维广角X射线衍射研究了熔融纺丝过程中的卷曲速度和加入HNTs对HDPE/HNTs复合纤维中HDPE基体晶片扭曲行为的影响。结果表明：HNTs在HDPE中起成核剂的作用，提高了HDPE基体的起始结晶温度和最大结晶温度，缩短了半结晶时间。随着卷曲速度的升高和HNTs含量的增加， HDPE基体晶片扭曲程度逐渐降低。