Characteristics and mechanism of low temperature dehydrochlorination of poly(vinyl chloride) in the presence of zinc(II) oxide

Effective methodology for the production of novel nanocomposite films based on poly(vinyl chloride) and zinc oxide nanoparticles modified with green poly(vinyl alcohol)

“…The first weight loss stage of PVC occurred around 230°C–330°C that can be related to dehydrochlorination, with the rapid weight loss rate. However, weight loss of PVC/ZNO‐PVA NCs commenced at lower temperature than pure PVC and confirmed some mechanism for example macroradicals which described solid–solid reaction between modified ZnO and PVC in inert atmosphere to produce water, HCl gas and Zn salt such as ZnCl 2 , Zn 2 OCl 2 at low temperature . Also weight losses of PVC/ZnO‐PVA NCs happened in lower temperature than pure PVC due to the rapid reaction of ZnO NPs and PVC and lower activation energy for dehydrochlorination in ZnO containing NCs.…”

Antimicrobial, mechanical, optical and thermal properties of PVC/ZnO‐EDTA nanocomposite films

“…Well‐dispersed ZnO‐EDTA NPs ameliorate solid–solid reaction with PVC in inert atmosphere to produce water, HCl gas and Zn salts even in low temperature from rapid reaction. The organized salts act as stronger Lewis acid catalysts in NC decomposition reaction with lower activation energy . Also, ZnO NPs may hasten the oxidative decomposition of surrounding carbon…”

“…With the current rate of PVC production in the world, burning of PVC wastes suggests creating energy and great volume reduction. Unfortunately, hard UV (<250 nm) irradiation and incineration of PVC produce some by‐products of combustion, including carcinogens such as vinyl chloride and polychlorinated compounds . HCl gas is evolved from incinerators when a repeating unit of the chain reacts to form conjugated double bonds.…”

A Benign and Simple Strategy for Surface Modification of Al2O3 Nanoparticles with Citric Acid and L(+)‐Ascorbic Acid and Its Application for the Preparation of Novel Poly(vinyl chloride) Nanocomposite Films

“…Also, PVC with different percentages of modified Al 2 O 3 passes through two major weight loss steps when heated from room temperature to 800°C. 38 The resulting TGA data including temperatures at which 5% (T 5 ), 10% (T 10 ) degradation behavior and char yield at 800°C are summarized in Table I. According to the PVC thermogram, the T 5 and T 10 were calculated as 240.3 and 254.8°C, respectively.…”