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<p>In this study, we conducted a comprehensive investigation of the structural, morphological, thermal, physical and rheological properties of poly (1,4-butylene succinate) (PBSu) extended with 1,6-diisocyanatohexane. We incorporated two types of fillers: montmorillonite clay (MMT) and silica nanoparticles (SiO<sub>2</sub>) at varying loadings to assess their effects. FTIR spectroscopy analysis revealed distinct peaks indicative of Si–O-Si bonds in both SiO<sub>2</sub> and MMT composites, highlighting significant interactions within the composite matrix. SEM analysis further confirmed the uniform dispersion of particles throughout the matrix. Thermal analysis via TGA revealed enhanced thermal stability in PBSu/SiO<sub>2</sub> composites, whereas a reduction in stability was observed with 20% MMT. DSC results highlighted the complex influence of fillers on crystallization behavior: MMT increased nucleation density and reduced spherulite size, accompanied by a significant decrease in glass transition temperature (Tg) due to the nanoconfinement effect. In contrast, SiO<sub>2</sub> facilitated matrix crystallization and improved overall crystallinity by acting as a nucleating agent. Rheological properties exhibited nuanced behaviors, with MMT enhancing complex viscosity at lower quantities but leading to viscosity reduction at higher loadings, indicative of molecular weight decrease. Conversely, the incorporation of SiO<sub>2</sub> significantly improved storage modulus, loss modulus and complex viscosity, suggesting strong particle-polymer interactions and enhanced dynamic properties.</p>

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Morphological, thermal, physical, and rheological study of biodegradable polymer poly (1,4-butylene succinate) extended with 1,6-diisocyanatohexane reinforced with montmorillonite and silica nanoparticles

  • 期刊论文

  • 发表日期：

    2025年5月31日

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  • Wafaa Mahi,
  • Khadidja Arabeche,
  • Djazia Bendeddouche,
  • Latifa Zair,
  • Mohammed Salah Eddine Hamroun,
  • Zoulikha Djamaa,
  • Abdelkader Berrayah

摘要

In this study, we conducted a comprehensive investigation of the structural, morphological, thermal, physical and rheological properties of poly (1,4-butylene succinate) (PBSu) extended with 1,6-diisocyanatohexane. We incorporated two types of fillers: montmorillonite clay (MMT) and silica nanoparticles (SiO2) at varying loadings to assess their effects. FTIR spectroscopy analysis revealed distinct peaks indicative of Si–O-Si bonds in both SiO2 and MMT composites, highlighting significant interactions within the composite matrix. SEM analysis further confirmed the uniform dispersion of particles throughout the matrix. Thermal analysis via TGA revealed enhanced thermal stability in PBSu/SiO2 composites, whereas a reduction in stability was observed with 20% MMT. DSC results highlighted the complex influence of fillers on crystallization behavior: MMT increased nucleation density and reduced spherulite size, accompanied by a significant decrease in glass transition temperature (Tg) due to the nanoconfinement effect. In contrast, SiO2 facilitated matrix crystallization and improved overall crystallinity by acting as a nucleating agent. Rheological properties exhibited nuanced behaviors, with MMT enhancing complex viscosity at lower quantities but leading to viscosity reduction at higher loadings, indicative of molecular weight decrease. Conversely, the incorporation of SiO2 significantly improved storage modulus, loss modulus and complex viscosity, suggesting strong particle-polymer interactions and enhanced dynamic properties.