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- Title
Influence of Strong Shear Field on Structure and Performance of HDPE/PA6 In Situ Microfibril Composites.
- Authors
Zhang, Junwen; Zhang, Yiwei; Li, Yanjiang; Luo, Mengna; Zhang, Jie
- Abstract
As one of the most widely applied general-purpose plastics, high-density polyethylene (HDPE) exhibits good comprehensive performance. However, mechanical strength limits its wider application. In this work, we introduced the engineering plastic PA6 as a dispersed phase to modify the HDPE matrix and applied multiple shears generated by vibration to the polymer melt during the packing stage of injection molding. SEM, 2D-WXRD and 2D-SAXS were used to characterize the morphology and structure of the samples. The results show that under the effect of a strong shear field, the dispersed phase in the composites can form in situ microfibers and numerous high-strength shish-kebab and hybrid shish-kebab structures are formed. Additionally, the distribution of fibers and high-strength oriented structures in the composites expands to the core region with the increase in vibration times. As a result, the tensile strength, tensile modulus and surface hardness of VIM-6 can reach a high level of 66.5 MPa, 981.4 MPa and 72, respectively. Therefore, a high-performance HDPE product is successfully prepared in this study, which is of great importance for expanding the application range of HDPE products.
- Subjects
HIGH density polyethylene; ENGINEERING plastics; INJECTION molding; COMPOSITE structures; PLASTICS engineering; MICROFIBERS
- Publication
Polymers (20734360), 2024, Vol 16, Issue 8, p1032
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym16081032