Tensile properties of high-density polyethylene nano-micron fibers with three-dimensional network structure
In order to achieve the large-scale production of high-density polyethylene nano-micron fibers with three-di-mensional network(PENFs),high-density polyethylene and dichloromethane were used as raw materials,PEN-Fs with high-performance were successfully prepared by high-pressure flash spinning equipment.The parame-ters during spinning process were optimized by response surface methodology.The mechanical and weather resis-tance properties of PENFs were analyzed.The results showed that the optimal preparation conditions for PENFs are spinning temperature of 176.3℃,spinning pressure of 8.6 MPa,and spinning solution mass fraction of 8.0％,then the fracture strength and elongation at break of the prepared PENFs can reach 29.1 cN/dtex and 99.9％,respectively,which are superior to conventional fibers such as aramid and polyester.Under constant e-longation and load conditions,the elastic recovery ability of PENFs decreases gradually with the increase of stretching times and load.When the stretching elongation is 5％,the elastic recovery rate of PENFs fibers can reach 92.8％,then decrease to 75.5％after stretching 10 times.When the stretching load is 1.2 N,the elastic recovery rate of PENFs fibers is 84.6％.The strength and elongation of PENFs fibers have little loss when PENFs fibers are placed outdoors for 20 d,and after 30 d the fracture strength and elongation at break of PENFs fibers significantly decrease,but there is no significant change in the appearance of the fibers.
万方数据
维普
