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202401014.pdf
文章编号： 1672-6987（2024）01-0100-08； DOI： 10.16351/j.1672-6987.2024.01.014
李媛媛， 乔盼， 贾婷婷， 尚子豪， 胡海青*(青岛科技大学 高分子科学与工程学院；橡塑材料与工程教育部重点实验室，山东 青岛 266042）
摘要： 采用熔融共混法分别制备了不同组分含量的多壁碳纳米管（MWCNTs）、少层石墨烯（FLG）和炭黑(CB)填充无规共聚聚丙烯（PPR）纳米复合材料。通过扫描电子显微镜（SEM）、毛细管流变仪、旋转流变仪等方法研究了不同聚丙烯复合材料的外观形貌及流变性能。结果表明，填料的添加量和形貌都会影响其黏弹性和内部结构，其中MWCNTs的加入对PPR复合材料的黏弹性改变明显强于CB 与FLG。在相同含量下，只有PPR/MWCNTs体系出现了拉伸硬化、黏弹逾渗、剪切变稀程度增加等特殊流变现象，这是高长径比MWCNTs的自身缠结及与基体间的缠结网络结构造成的。
关键词： 碳系填料； 无规共聚聚丙烯； 拉伸硬化； 流变性能
中图分类号： O 063文献标志码： A
引用格式： 李媛媛， 乔盼， 贾婷婷， 等.不同维度碳系材料填充无规共聚聚丙烯的流变行为［J］. 青岛科技大学学报(自然科学版), 2024, 45（1）： 100-107.
LI Yuanyuan, QIAO Pan, JIA Tingting, et al. Rheological behavior of polypropylene-random filled with different dimensional carbon-based materials［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2024， 45（1）： 100-107.
Rheological Behavior of Polypropylene-Random Filled with
Different Dimensional Carbon-Based Materials
LI Yuanyuan, QIAO Pan, JIA Tingting, SHANG Zihao, HU Haiqing
(College of Polymer Science and Engineering; Key Laboratory of Rubber-Plastics, Ministry of Education,
Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: Multi-walled carbon nanotubes (MWCNTs), few-layer graphene (FLG) and carbon black (CB) filled Polypropylene-Random (PPR) nanocomposites with different component contents were prepared by melt blending method in this study. The appearance, morphology and rheological properties of different polypropylene composites were studied by scanning electron microscope (SEM), capillary rheometer, rotational rheometer, and other methods. The results show that the amount and morphology of fillers will affect its viscoelasticity and internal structure, and the addition of MWCNTs has significantly stronger changes in the viscoelasticity of PPR composites than CB and FLG. At the same content, only the PPR/MWCNTs system exhibits special rheological phenomena such as elongation hardening behavior, viscoelastic percolation, and increased shear thinning. The reason for this result is the formation of the self-entanglement of the high aspect ratio MWCNTs and the formation of the entanglement network structure between the MWCNTs and the matrix.
Key words: carbon-based filler; polypropylene-random; elongation hardening; rheological properties
收稿日期： 2023-01-01
基金项目： 山东省自然科学基金资助项目（ZR2016BM15）.
作者简介： 李媛媛(1997-)，女，硕士研究生.*通信联系人.
