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<p>Conducting polymers have garnered significant attention due to their electrical activity arising from the π-electron conjugation along the polymeric backbone, making them suitable for diverse applications. In this study, we report a novel approach to photostabilization by synthesizing poly(toluidine) derivatives (ortho, meta, and para) via chemical oxidative polymerization using ammonium peroxydisulfate as the initiator. The resulting polytoluidines (PTs) were systematically characterized, and conductivity measurements revealed that the ortho-derivative exhibited the highest electrical conductivity. For the first time, these PTs were explored as photostabilizers for poly(vinyl chloride) (PVC) films, a new application for these derivatives. PVC films with and without PTs were subjected to ultraviolet (UV) irradiation for 30 days, and the gel content was monitored as an indicator of degradation. Notably, the blank PVC film showed complete degradation (100% gel content), while films containing PTs retained significantly higher photostability. Among the derivatives, para-toluidine (PpT) demonstrated superior UV-stabilizing performance, surpassing the commercial UV absorber Chimassorb in protecting PVC for up to 144&#xa0;h of UV exposure. This study introduces poly(toluidine) derivatives as a new class of dual-function materials combining conductivity and photostabilization, offering a promising alternative to conventional UV stabilizers in polymer protection.</p>

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Investigating Ortho, Meta, and Para Polytoluidine Derivatives: Applications in Photostabilization of PVC

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Soliman M.A. Soliman,
  • Mohamed A. Sanad,
  • Mahmoud A. Abd El-Ghaffar,
  • Nourelhoda A. Abdelwahab,
  • Magdy W. Sabaa

摘要

Conducting polymers have garnered significant attention due to their electrical activity arising from the π-electron conjugation along the polymeric backbone, making them suitable for diverse applications. In this study, we report a novel approach to photostabilization by synthesizing poly(toluidine) derivatives (ortho, meta, and para) via chemical oxidative polymerization using ammonium peroxydisulfate as the initiator. The resulting polytoluidines (PTs) were systematically characterized, and conductivity measurements revealed that the ortho-derivative exhibited the highest electrical conductivity. For the first time, these PTs were explored as photostabilizers for poly(vinyl chloride) (PVC) films, a new application for these derivatives. PVC films with and without PTs were subjected to ultraviolet (UV) irradiation for 30 days, and the gel content was monitored as an indicator of degradation. Notably, the blank PVC film showed complete degradation (100% gel content), while films containing PTs retained significantly higher photostability. Among the derivatives, para-toluidine (PpT) demonstrated superior UV-stabilizing performance, surpassing the commercial UV absorber Chimassorb in protecting PVC for up to 144 h of UV exposure. This study introduces poly(toluidine) derivatives as a new class of dual-function materials combining conductivity and photostabilization, offering a promising alternative to conventional UV stabilizers in polymer protection.