Oil from poly(vinyl chloride): Unprecedented degradative chain scission under mild thermooxidative conditions

Szarka, Györgyi; Domján, Attila; Szakács, Tibor; Iván, Béla

doi:10.1016/j.polymdegradstab.2012.06.005

Cited by 30 publications

(16 citation statements)

References 39 publications

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“…is the large increase in the relative intensities of the absorption bands (1,485, 1,454, 1,271, 1,224 cm −1 ) in the region (2,000–1,000 cm −1 ), in comparison with that of unblended p ‐PFS film. This may indicate that there is an increase in the number of (C=C) that resulted from hydrogen abstraction during chains‐scission process .…”

Section: Resultsmentioning

confidence: 99%

Fourier‐transform infrared spectroscopic study of plasticization effects on the photodegradation of poly(fluorostyrene) isomers films

Ani

Ramadhan

Sieadi

2015

Vinyl Additive Technology

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The photodegradation of poly(fluorostyrene) isomers with different amounts of phthalate and terephthalate plasticizers has been investigated with the aid of Fourier‐transform infrared spectroscopy. Photo irradiation was carried out with light from a Hydrogen‐Xenon lamp at 265 nm and 293 K. As irradiation time increased, changes occurred in the structure of the polymers due to the destruction of polymeric chains and the formation of new photo products during the degradation. The photo products caused shifts, an increase or decrease of the polymer vibrational frequencies, as well as changes in numerous infrared band intensities. The increase in the intensities of the analyzed ranges is attributed to the formation of carbonyl, hydroxyl, and aliphatic ketones and to the increase in the number of polyene structures that resulted from hydrogen abstraction during photodegradation reactions. The analysis of the Fourier‐transform infrared spectra of the irradiated and nonirradiated samples showed a noticeable formation of a new broad band centered at (1,727 cm−1, C=O), assigned to the growth of aliphatic ketones formerly from the reaction of reactive alkoxy radicals. Its intensity was found to increase with the increase in irradiation time and also with the increase in the amount of added terephthalate and phthalates plasticizer, indicating an increase in the efficiency of the photo degradation process. Trends of photostability of these isomers were found such that poly(para‐fluorostyrene) > poly(meta‐fluorostyrene) > poly(ortho‐fluorostyrene). The photodegradation process for these plasticized isomers was found to increase by the increase in the bulkiness of the plasticizer molecule. J. VINYL ADDIT. TECHNOL., 24:75–83, 2018. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Fourier‐transform infrared spectroscopic study of plasticization effects on the photodegradation of poly(fluorostyrene) isomers films

Ani

Ramadhan

Sieadi

2015

Vinyl Additive Technology

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“…Oily products are formed from PVC after 3 h of reaction time at 200 o C. 77 The enhanced dehydrochlorination is accompanied with rapid chain scission without any detectable crosslinking. 77 Thermal zip elimination of HCl occurs and oxidation leads to scission of polyenes producing low molecular weight fragments.…”

Section: Waste Processingmentioning

confidence: 99%

“…77 Thermal zip elimination of HCl occurs and oxidation leads to scission of polyenes producing low molecular weight fragments. 77 The chain breaking takes place mostly in the middle of the conjugated polyene. 77 An overview of water treatment technology can be found elsewhere.…”

Section: Waste Processingmentioning

confidence: 99%

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HEALTH & SAFETY AND ENVIRONMENTAL IMPACT

Wypych¹

2015

PVC Degradation and Stabilization

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“…The changes of the molecular structure of the PVC by the effect of UV light are important issue that has attracted the attention of many researchers . Formation of conjugated polyene sequences resulting from UV irradiation gives rise to discoloration of the polymeric matrix and other damaging effects in its physical properties . As known, polymeric materials in general are extensively used in industries because of the ease production, ductile and also their light weight nature.…”

Section: Introductionmentioning

confidence: 99%

Photostability, thermal and mechanical properties of poly(vinyl chloride)/novel acrylate terpolymer blend

Nazer

Elgohary

Rabie

2018

Vinyl Additive Technology

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Methyl methacrylate/2‐hydroxyethyl methacrylate/maleic anhydride terpolymer with various compositions was synthesized, characterized and investigated as a photostabilizer for rigid polyvinyl chloride (PVC). The chemical structure of the terpolymer MMA/HEMA/MA, was confirmed by ultraviolet–visible and FTIR, spectroscopy. The molecular weights of the terpolymer were determined by applying gel permeation chromatography. The stabilizing efficiency of the terpolymer was evaluated by the determination of the weight loss of PVC/terpolymer blends after various irradiation times. The content of the formed gel as well as the intrinsic viscosity of the soluble fraction of the photodegraded polymer were also determined. The efficiency was also evaluated by measuring the extent of the discoloration of the photodegraded polymer. Thermal gravimetric analysis of the terpolymer and PVC/terpolymer blend were measured. Moreover, physicomechanical properties of photodegraded stabilized PVC samples were as well measured. The results revealed that the photostabilizing efficiency as well as thermal stability increased in the presence of the terpolymer as blended with PVC and by the increase of maleic anhydride ratio in the terpolymer. The photostabilizing efficiencies were compared with the industrially known UV absorber 2‐hydroxy‐4‐(octyloxy) phenylbenzophenone. J. VINYL ADDIT. TECHNOL., 25:E55–E62, 2019. © 2018 Society of Plastics Engineers

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Oil from poly(vinyl chloride): Unprecedented degradative chain scission under mild thermooxidative conditions

Cited by 30 publications

References 39 publications

Fourier‐transform infrared spectroscopic study of plasticization effects on the photodegradation of poly(fluorostyrene) isomers films

Fourier‐transform infrared spectroscopic study of plasticization effects on the photodegradation of poly(fluorostyrene) isomers films

HEALTH & SAFETY AND ENVIRONMENTAL IMPACT

Photostability, thermal and mechanical properties of poly(vinyl chloride)/novel acrylate terpolymer blend

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