摘要
选用聚对苯二甲酸乙二醇酯(PET)作为基体材料,通过添加聚对苯二甲酸丁二醇酯(PBT)、相容剂、增韧剂和成核剂制得适用于熔融沉积技术的PET丝材。结果表明,当PET∶PBT为7∶3时,熔体流动速率最低;过多相容剂在螺杆进料口架桥,不利于螺杆挤出;当增韧剂含量为15份(质量份,下同)时,材料能够正常打印,样条无翘曲且表面光滑,材料的拉伸强度和弯曲强度都较高,分别为25.95 MPa和45.99 MPa,冲击强度为50.4 kJ/m2;添加0.5份滑石粉后材料的力学强度的改善效果更佳。
The PET wire material was prepared by selecting poly(ethylene terephthalate)(PET)as a matrix using PBT as a compatibilizer along with a toughening agent and a nucleating agent.It was found that the wire material obtained at a PET/PBT weight ratio of 7/3 presented the lowest melt flow rate.The addition of too much compatibilizer resulted in bridging at the screw inlet,which was disadvantageous to screw extrusion.The results obtained from the 3D printing and mechanical measurement indicated that the wire material could be normally printed at a content of toughening agent of 15 phr.The printed specimen exhibited a smooth surface without any warps.The wire material achieved tensile strength of 25.95 MPa,bending strength of 45.99 MPa,and impact strength of 50.4 kJ/m2.The addition of 0.5 phr talc can im-prove the mechanical strength of the material better.
机构地区
上海3D打印材料工程技术研究中心
出处
《中国塑料》
CAS
CSCD
北大核心
2021年第5期24-31,共8页
CHINA PLASTICS
基金
上海3D打印材料工程技术研究中心(11DZ2251100)
上海市科学技术委员会优秀技术带头人计划项目(18XD1420800)
上海青年拔尖人才开发计划自然科学类。
关键词
聚对苯二甲酸乙二醇酯
聚对苯二甲酸丁二醇酯
改性
三维打印
poly(ethylene terephthalate)
poly(butylene terephthalate)
modification
three dimension printing
