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<p>Biodegradable materials provide protective properties comparable to conventional plastics while diminishing reliance on non-renewable resources. Environmentally friendly polymer blends were prepared by poly(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate) (PHBHHx), poly (butylene succinate) (PBS), and 1,4-Bis(tert-butyl peroxy isopropyl) benzene (BIPB). The effects of PBS content on mechanical properties, thermal behavior, compatibility, and thermal stability of PHBHHx/PBS. This study developed eco-friendly PHBHHx/PBS/BIPB blends to balance biodegradability with performance. 0.2% BIPB significantly improved PHBHHx’s impact strength (from 2 to 5.6&#xa0;kJ&#xa0;m<sup>−2</sup>) and elongation at break (from 4.8 to 10.2%). Adding 50&#xa0;mass% PBS further boosted these properties by 308% (to 21.5&#xa0;kJ&#xa0;m<sup>−2</sup>) and 286% (to 300%), respectively. BIPB acted as a nucleating agent, accelerating crystallization from 5&#xa0;min to 30–60&#xa0;s and enhancing PHBHHx/PBS compatibility. It also raised the Vicat softening temperature of pure polymers by over 10&#xa0;°C, demonstrating dual functionality in improving both mechanical and thermal stability.</p>

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Effect of BIPB on the crystallization structure and mechanical properties of PHBHHx/PBS blends

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Yanbo Li,
  • Wencheng Cui,
  • Lili Ma,
  • Yan Zhao,
  • Hongwei Pan,
  • Baochang Jin,
  • Huili Yang,
  • Junjia Bian,
  • Huiliang Zhang

摘要

Biodegradable materials provide protective properties comparable to conventional plastics while diminishing reliance on non-renewable resources. Environmentally friendly polymer blends were prepared by poly(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate) (PHBHHx), poly (butylene succinate) (PBS), and 1,4-Bis(tert-butyl peroxy isopropyl) benzene (BIPB). The effects of PBS content on mechanical properties, thermal behavior, compatibility, and thermal stability of PHBHHx/PBS. This study developed eco-friendly PHBHHx/PBS/BIPB blends to balance biodegradability with performance. 0.2% BIPB significantly improved PHBHHx’s impact strength (from 2 to 5.6 kJ m−2) and elongation at break (from 4.8 to 10.2%). Adding 50 mass% PBS further boosted these properties by 308% (to 21.5 kJ m−2) and 286% (to 300%), respectively. BIPB acted as a nucleating agent, accelerating crystallization from 5 min to 30–60 s and enhancing PHBHHx/PBS compatibility. It also raised the Vicat softening temperature of pure polymers by over 10 °C, demonstrating dual functionality in improving both mechanical and thermal stability.