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The study on microstructure and mechanical properties of multi-component composite based on HDPE
Yazhen Wang1,2,3, Chenglong Wang1,2, Shaobo Dong2
1College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, China.
Designed Monomers and Polymers
|October 16, 2020
Summary
Adding maleic anhydride (MA) to basalt fiber (BF) and polyamide 6 (PA6) reinforced HDPE composites altered microstructure and enhanced mechanical properties. MA modified HDPE crystallization, improving composite toughness.
Area of Science:
- Materials Science
- Polymer Science
- Composite Materials
Background:
- High-density polyethylene (HDPE) composites reinforced with basalt fiber (BF) and polyamide 6 (PA6) are investigated.
- Understanding the influence of additives like maleic anhydride (MA) on composite microstructure and properties is crucial for material design.
Purpose of the Study:
- To investigate the effects of BF, PA6, and MA on the microstructure and crystallization behavior of HDPE composites.
- To analyze the impact of these components on the mechanical properties and toughening mechanisms of the composites.
Main Methods:
- Microstructural characterization using Scanning Electron Microscopy (SEM).
- Differential Scanning Calorimetry (DSC) for analyzing crystallization behavior.
- Crystallization kinetics and activation energy analysis using Jeziorny, Avrami-Ozawa, and Kissinger methods.
Main Results:
- BF/PA6/HDPE composites exhibited a core-shell structure, with encapsulation decreasing upon MA addition.
- PA6 and BF acted as nucleation agents, accelerating HDPE crystallization; MA shifted the crystal growth mechanism.
- Composites with 3 wt% MA showed the lowest crystallinity energy and crystallinity, alongside a 61% improvement in mechanical properties.
Conclusions:
- Maleic anhydride significantly influences the microstructure, crystallization, and mechanical properties of BF/PA6/HDPE composites.
- The observed toughening is attributed to a combination of multiple mechanisms, enhanced by the addition of MA.
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