Effect of hydrophobic nano-silica/β-nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

Shiqi Chen, Luhan Bai, Xuanlun Wang*, Handong Li, Ben Bin Xu, Hassan Algadi, Zhanhu Guo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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In this work, hydrophobic nano-silica (SiO2) and β-nucleating agent are incorporated into polypropylene random copolymer (PP-R) matrix by melt blending. The effect of the content of nano-SiO2/β-nucleating agent on the crystallization and mechanical behaviors of PP-R was investigated in detail. For a nano-SiO2 content of 0.5 wt% and a β-nucleating agent content of 0.5 wt%, the tensile strength and impact strength of the composite were in a more balanced position. Regarding isothermal and non-isothermal crystallization experiments, nano-SiO2/β-nucleating agent significantly accelerated the nucleation and growth of crystallites with a synergistic nucleation effect. Also, the crystallization kinetics of PP-R/nano-SiO2/β-nucleating agent, PP-R/nano-SiO2 and PP-R/β-nucleating agent composites were analyzed and compared using the Avrami equation. The results showed that the PP-R/nano-SiO2/β-nucleating agent composites have better crystallization rate and shorter semi-crystallization time. This study shows far-reaching theoretical and practical implications for accelerating the development of new high-performance PP-R materials.
Original languageEnglish
Pages (from-to)108-118
Number of pages11
JournalPolymer International
Issue number2
Early online date14 Sept 2023
Publication statusPublished - 1 Feb 2024

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