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<p>To improve the slow crystallization and difficult processing issues of polyethylene terephthalate (PET) and enhance its mechanical properties, we prepared a nucleating agent composed of sodium linoleate and talc, studied the synergistic effects of both individual and composite components on properties of PET, and established that the optimal talc to sodium linoleate ratio is 1:1. The sodium carboxylate component serves as the primary active agent governing PET crystallization. The synergistic action of both can lower the crystal grain size during PET crystallization, resulting in a 13–23% enhancement in flexural modulus. Based on the findings, we prepared five alternative compound nucleating agents (CNAs) made from sodium carboxylate and talc. Among them, the crystallization performance and mechanical properties of PET nucleated with the CNA in which the mass ratio of sodium linoleate to talc is 1:1 exhibited the most significant enhancement compared with pure PET, surpassing the performance improvement observed in PET nucleated with the commercial nucleating agent P250. The findings indicate that the nucleating agents developed in this work demonstrate significant potential to substitute commercial nucleating agents, reducing production costs, enhancing PET characteristics, and facilitating industrial manufacturing.</p>

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Properties and crystallization behaviors of polyethylene terephthalate nucleated with compound nucleating agents based on talc and carboxylates

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Zhengyu Hu,
  • Yaqiong Zhao,
  • Meijiao Yuan,
  • Ting Huang,
  • Yue-Fei Zhang

摘要

To improve the slow crystallization and difficult processing issues of polyethylene terephthalate (PET) and enhance its mechanical properties, we prepared a nucleating agent composed of sodium linoleate and talc, studied the synergistic effects of both individual and composite components on properties of PET, and established that the optimal talc to sodium linoleate ratio is 1:1. The sodium carboxylate component serves as the primary active agent governing PET crystallization. The synergistic action of both can lower the crystal grain size during PET crystallization, resulting in a 13–23% enhancement in flexural modulus. Based on the findings, we prepared five alternative compound nucleating agents (CNAs) made from sodium carboxylate and talc. Among them, the crystallization performance and mechanical properties of PET nucleated with the CNA in which the mass ratio of sodium linoleate to talc is 1:1 exhibited the most significant enhancement compared with pure PET, surpassing the performance improvement observed in PET nucleated with the commercial nucleating agent P250. The findings indicate that the nucleating agents developed in this work demonstrate significant potential to substitute commercial nucleating agents, reducing production costs, enhancing PET characteristics, and facilitating industrial manufacturing.