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

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International Pub Date : 2023-09-14 DOI:10.1002/pi.6575

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

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Abstract

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. © 2023 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry.

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疏水性纳米二氧化硅/β-成核剂对聚丙烯无规共聚物结晶行为和机械性能的影响

在这项研究中，通过熔融共混将疏水性纳米二氧化硅（SiO2）和β-成核剂加入到聚丙烯无规共聚物（PP-R）基体中。详细研究了纳米二氧化硅/β-成核剂的含量对 PP-R 结晶和机械性能的影响。在纳米二氧化硅含量为 0.5 wt%、β-成核剂含量为 0.5 wt%的情况下，复合材料的拉伸强度和冲击强度较为均衡。在等温和非等温结晶实验中，纳米二氧化硅/β-成核剂以协同成核效应显著加速了结晶的成核和生长。此外，还利用 Avrami 方程对 PP-R/纳米二氧化硅/β-成核剂、PP-R/纳米二氧化硅和 PP-R/β- 成核剂复合材料的结晶动力学进行了分析和比较。结果表明，PP-R/纳米二氧化硅/β-成核剂复合材料具有更好的结晶速率和更短的半结晶时间。该研究对加速开发新型高性能 PP-R 材料具有深远的理论和实践意义。© 2023 作者。国际聚合物》由 John Wiley & Sons Ltd 代表工业化学学会出版。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.