【摘要】 采用双螺杆挤出机熔融共混制备了HDPE/SEBS高分子合金材料，研究了SEBS含量对HDPE/SEBS合金材料的力学性能、耐热性、结晶性能、微观形貌的影响。实验结果表明，随着SEBS含量的增加，合金材料的结晶温度和熔融温度都有下降趋势，缺口冲击强度逐渐增大，拉伸强度和弹性模量减小，当SEBS含量为12%时，冲击强度达到31.56kJ/m~2，提高了61.3%；弹性模量降低至612.6MPa，降低了18.4%。断裂形貌显示SEBS在HDPE基体中有良好的分散性，HDPE/SEBS高分子合金材料呈韧性断裂。更多还原

【Abstract】 HDPE/SEBS polymer alloy materials were prepared by melt blending using a twin-screw extruder,and the influence of SEBS content on the mechanical properties,heat resistance,crystallization properties,and microstructure of HDPE/SEBS alloy materials was studied.The experimental results show that with the increase of SEBS content,the crystallization temperature and melting temperature of the alloy material have a decreasing trend,the notch impact strength gradually increases,and the tensile strength and elastic modulus decrease.When the SEBS content is 12%,the impact strength reaches 31.56 kJ/m~2,an increase of 61.3%;The elastic modulus decreased to 612.6 MPa,a decrease of 18.4%.The fracture morphology shows that SEBS has good dispersibility in the HDPE matrix,and the HDPE/SEBS polymer alloy material exhibits ductile fracture.更多还原