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<p>In order to enhance the mechanical and thermal properties of polypropylene (PP) and expanded its application potential in the automobile industry and the home appliance manufacturing industry, this study examined the impact of α-nucleating agent addition on the crystalline properties of PP specimens. Isothermal and non-isothermal crystallization kinetics were utilized for analysis, alongside an analysis of crystallization behavior, mechanical properties, and heat distortion temperatures of the PP specimens. The findings revealed that the incorporation of α-nucleating agent significantly increased the crystallization temperature of PP from 123.32 to 130.45&#xa0;°C, enhancing the crystallization rate. The flexural modulus of the modified PP specimens significantly increased from 839.26 to 1499.4&#xa0;MPa, marking a 78.7% improvement, while the heat deflection temperature rosed from 83 to 124&#xa0;°C, a 49.4% increase. This research provides an effective and practical approach for producing PP with elevated modulus and heat deflection temperature.</p>

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Improvement on the mechanical and thermal properties of polypropylene by modulating its crystallization behaviors

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Yu Xue,
  • Dongxing Dun,
  • Yongjiang Gu,
  • Wenbo Sun,
  • Shuai Ma,
  • Hongfu Zhou,
  • Jian Li,
  • Xiangdong Wang

摘要

In order to enhance the mechanical and thermal properties of polypropylene (PP) and expanded its application potential in the automobile industry and the home appliance manufacturing industry, this study examined the impact of α-nucleating agent addition on the crystalline properties of PP specimens. Isothermal and non-isothermal crystallization kinetics were utilized for analysis, alongside an analysis of crystallization behavior, mechanical properties, and heat distortion temperatures of the PP specimens. The findings revealed that the incorporation of α-nucleating agent significantly increased the crystallization temperature of PP from 123.32 to 130.45 °C, enhancing the crystallization rate. The flexural modulus of the modified PP specimens significantly increased from 839.26 to 1499.4 MPa, marking a 78.7% improvement, while the heat deflection temperature rosed from 83 to 124 °C, a 49.4% increase. This research provides an effective and practical approach for producing PP with elevated modulus and heat deflection temperature.