CAJ | 학술논문

采用不同螺纹块组合的双螺杆挤出机制备HDPE/UHMWPE共混物,研究UHMWPE用量、螺杆结构对共混物力学性能、流变行为及分散形态的影响.结果表明:随着UHMWPE用量的增加,共混物的拉伸和缺口冲击强度随之增加,特殊螺杆挤出机制备共混物的机械性能均比普通螺杆的提高.UHMWPE使共混物成型加工黏度增大,特殊螺杆能降低共混物成型加工黏度.偏光显微镜照片显示,特殊双螺杆挤出机使UHMWPE熔融程度和分散程度增大.
채용불동라문괴조합적쌍라간제출궤제비HDPE/UHMWPE공혼물,연구UHMWPE용량、라간결구대공혼물역학성능、류변행위급분산형태적영향.결과표명:수착UHMWPE용량적증가,공혼물적랍신화결구충격강도수지증가,특수라간제출궤제비공혼물적궤계성능균비보통라간적제고.UHMWPE사공혼물성형가공점도증대,특수라간능강저공혼물성형가공점도.편광현미경조편현시,특수쌍라간제출궤사UHMWPE용융정도화분산정도증대.
Twin screw extruders with two kinds of screw structure were used to prepare the HDPE/UHMWPE blends. The results suggested that tensile strength and notched impact strength increased with the increasing of the UHMWPE content. UHMWPE made the viscosity of the blends increased and the especial screw extruder could decrease the viscosity of the blends. The photos of the polarized micrographs revealed that the dispersion and dissolved degree of UHMWPE in HDPE were improved greatly by the special screw.