Effect of Compatibilizer on Microstructure and Properties of Polypropylene Microfibrillar Composites
[1]JIANG Jing,LI Zhongxing,HE Junwei,et al.Effect of Compatibilizer on Microstructure and Properties of Polypropylene Microfibrillar Composites[J].Journal of Zhengzhou University (Engineering Science),2026,47(5):137-144.[doi:10.13705/j.issn.1671-6833.2026.02.011]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
47
Number of periods:
2026 Issue 5
Page number:
137-144
Column:
Public date:
2026-09-09
- Title:
- Effect of Compatibilizer on Microstructure and Properties of Polypropylene Microfibrillar Composites
- Keywords:
- polypropylene; polyethylene glycol terephthalate; in-situ fibrillation; compatibilizer; microstructure; mechanical properties
- CLC:
- TQ325. 1+4TB332
- Abstract:
- To address the limitation in mechanical property enhancement caused by the poor compatibility between the polypropylene (PP) matrix and polyethylene terephthalate (PET) microfibers in‑situ microfibrillar PP/PET composites, an "in‑situ fibrillation via melt blending‑high‑speed hot stretching" technique was employed in this study. Ternary PP/PET/PP‑g‑MAH microfibrillar composites were successfully fabricated by introducing maleic anhydride‑grafted polypropylene (PP‑g‑MAH) as a compatibilizer. The effects of compatibilizer content on the microstructure, crystallization behavior, rheological properties, and mechanical performance of the composites were systematically investigated. Results showed that the addition of PP‑g‑MAH significantly reduced the phase domain size of PET spherical particles before fibrillation, and the interfacial compatibility was improved. After in‑situ fibrillation, a high draw ratio of 14.2 was achieved by the PET microfibers, and well‑dispersed microfibrils with a minimum diameter of 202 nm were obtained. The synergistic effect of PET microfibrils and a small amount of compatibilizer significantly accelerated the crystallization rate of the PP matrix and the melt viscoelasticity was enhanced. Compared to neat PP, the tensile strength of the composites was improved by 11.5% and 24.5% through compatibilizer addition and in‑situ fibrillation, respectively, and by up to 30% through their combined effect. Additionally, the tensile fracture energy was increased by 217% compared to conventional PP/PET blends. These findings showed that the PP matrix could be effectively enhanced and toughened by the synergistic approach of using a compatibilizer in conjunction with in‑situ fibrillation.
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Last Update:
2026-09-07
