Polyphosphates as Inhibitors for Poly(vinyl Chloride) Photodegradation.

Dina Ahmed,Emad Yousif,Ayad Hameed,Gamal El-Hiti

doi:10.3390/molecules22111849

Dina Ahmed, Emad Yousif + Show 2 more

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https://doi.org/10.3390/molecules22111849

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Abstract

Three polyphosphates were used as inhibitors for poly(vinyl chloride) (PVC) photodegradation. The polyphosphates were added to PVC at a concentration of 0.5% by weight. The PVC films (40 µm thickness) were irradiated at room temperature with ultraviolet (UV) light for up to 300 h. The changes in PVC films after irradiation were monitored by Fourier transform infrared spectroscopy, weight loss, viscosity-average molecular weight determination, and atomic force microscopy. These changes were very noticeable in the blank PVC films compared to the ones obtained when additives were used. The polyphosphates can inhibit the PVC photodegradation through direct absorption of UV light, interactions with PVC chains, and acting as radical scavengers.

Highlights

The principles of green chemistry have attracted noticeable attention [1,2].Green chemistry tends to eliminate or reduce waste byproducts by developing chemical processes that are environmentally friendly [3]
Three polyphosphates were used as photostabilizers of poly(vinyl chloride) (PVC) films
FT-IR spectroscopy and viscosity-average molecular weight analysis indicated that polyphosphates act as inhibitors of PVC

Summary

Introduction

The principles of green chemistry have attracted noticeable attention [1,2]. Green chemistry tends to eliminate or reduce waste byproducts by developing chemical processes that are environmentally friendly [3]. The production of chemicals and in particular polymers has to be efficient to produce materials that are highly stable and resist weathering conditions. In particular, poly(vinyl chloride) (PVC), are widely used in various applications. PVC can be used in automobiles, pipes, electrical cables, window frames, packing, and many other applications. Linear PVC is a colorless rigid material with high density and a low softening point

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