面向3D打印应用的PP/PET共混线材制备和性能
Preparation and properties of PP/PET filament blends for 3 D printing applications
王重阳 1王艳 1曹帅 1豆保平 1赵新宇 1邱帅 1王绎苏 1张鸿 1郭静 1王胜法 2权慧欣3
作者信息
- 1. 大连工业大学 纺织与材料工程学院,辽宁 大连 116034
- 2. 大连理工大学 软件学院 国际信息与软件学院,辽宁 大连 116620
- 3. 大连医科大学附属第一医院,辽宁 大连 116011
- 折叠
摘要
为了拓展聚丙烯(polypropylene,PP)在3D打印技术中的应用,并改善其力学性能,采用熔融共混的方式将PP与聚对苯二甲酸乙二醇酯(Polyethylene terephthalate,PET)挤出,制备PP/PET共混线材.分析不同PP,PET混合比例的共混线材的流变行为、结晶结构、熔融和结晶行为、微观形貌结构、力学性能以及 3D打印试样的力学性能.结果表明:PP/PET共混物的黏度随剪切速率的提高而下降,表现出切力变稀行为;在PP结晶过程中,PET充当成核剂的角色,且没有改变PP的晶型;PP的熔融温度在150℃左右,结晶温度随PET含量增加而提高;PP基体和PET分散相存在明显的"海-岛"结构,其中PET为"岛"相,直径为2～5 μm;共混线材的拉伸强度随PET含量的增加不断提高,同时,3D打印试样的拉伸强度和冲击强度提高,而由于层间界面作用3D打印试样的力学性能普遍低于共混线材.
Abstract
In order to expand the application of polypropylene(PP)in 3D printing technology and improve its mechanical properties,PP/polyethylene terephthalate(PET)blend filaments were prepared by extruding PP with PET using melt blending.The rheological behavior,crystallization structure,melting and crystallization behavior,microstructure,mechanical properties of the filament blends and 3D printed samples with different mixing ratios of PP,PET were analyzed.The results show that the viscosity of PP/PET blends decreases with the increase of shear rate and exhibits shear thinning behavior.PET acts as a nucleating agent and does not change the crystal shape of PP during PP crystallization.The melting temperature of PP is about 150℃,and the crystallization temperature increases with the increase of PET concentrations.The PP matrix and PET dispersed phase have obvious"sea-island"structure,in which PET is the"island"phase,with a diameter of 2-5 μm.With the increase of PET concentrations,the tensile strength of filament blends is improved.Simultaneously,the tensile strength and the impact strength of the 3D printed samples is improved.However,the mechanical properties of 3D printed samples are generally lower than those of filament blends due to interlayer interaction.
关键词
聚丙烯/共混改性/力学性能/3D打印Key words
polypropylene/blending modification/mechanical property/3D printing引用本文复制引用
基金项目
国家自然科学基金(51503023)
国家自然科学基金(61772104)
高分子材料工程国家重点实验室(四川大学)开放课题(sklpme2021-05-04)
辽宁省教育厅面上项目(LJKZ0533)
出版年
2024
国家科技期刊平台
NSTL
万方数据