IR spectroscopic study of the temperature behaviour of conformational transitions in polyvinylchloride

Solid phase photocatalytic degradation of polyethylene (PE) and polyvinyl chloride (PVC) with various photocatalysts such as ceria annealed at 350°C and 850°C, zinc oxide annealed at 250°C, copper sulfide and titania particles was studied under different light sources. Except titania, all the other photocatalysts performed reasonably well both in the visible and ultraviolet (UV) radiations. Ceria annealed at 850°C showed degradation efficiencies higher than 70% for PVC in the fluorescent and solar radiation. Ceria annealed at 350°C showed degradation efficiencies higher than 75% for polyethylene in fluorescent, solar and UV radiation. The Fourier transform infrared spectroscopy studies show the presence of adsorbed carbon dioxide on the degraded polymer-photocatalyst composite films. The UV-visible spectroscopic studies show that the ceria, zinc oxide and copper sulfide photocatalysts are active in the visible spectrum resulting in enhanced degradation efficiency in fluorescent and solar radiation.

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“…2. The peak at 693 cm -1 corresponds to C-Cl bond characteristic of PVC [19]. The peak at 3669 cm -1 represents OH stretching band [20].…”

Section: Resultsmentioning

confidence: 99%

Visible Range Photocatalysts for Solid Phase Photocatalytic Degradation of Polyethylene and Polyvinyl Chloride

Gupta

Lakshmp

Manivannan

et al. 2017

J. Chil. Chem. Soc.

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“…На низкотемпературные свойства гибких материалов на основе ПВХ больше влияет тип и концентрация пластификатора, чем тип полимера [27,28].…”

Section: методыunclassified

Influence of composition on physical and mechanical properties of modified PVC

Alekseenko,

Gonzhitov,

Bugdaev

2024

jour

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The present article aims to create polyvinyl chloride composites used in polymer hoses, to study their composition, as well as physical and mechanical characteristics. Polyvinyl chloride is a waterinsoluble material, resistant to weak acids, alkalis, alcohols, and mineral oils. The main characteristics limiting the use of flexible polymer hoses include elasticity at low temperatures and bending resistance at positive temperatures. Hose flexibility is determined by the properties of plasticized polyvinyl chloride together with its ultimate elongation at break and thickness. To study the properties of modified polyvinyl chloride, a MiniTPA-100 extruder was used to create test samples. The samples were cooled in a special refrigeration chamber. Elasticity measurements were performed employing a standard tensile testing scheme on an Instron 5980 testing machine. The measurements were taken at 20 °C, -40 °C, and -50 °C. The investigation of the compositions of polymer composites was conducted using extraction methods with various solvents. These studies enable one to evaluate the properties of polymer composites. Before testing, the samples were held at specified temperatures. The strain rate equaled 3 mm/sec for all samples. The proposed laboratory techniques give an opportunity to evaluate most of the performance characteristics of polyvinyl chloride composites. The obtained results indicate that the performance characteristics of flexible polymer hoses can be fully predicted based on laboratory testing of the materials composing the hose. The results also confirm the potential of work on polyvinyl chloride modification using thermoplastic elastomers.

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High‐temperature mechanical behavior of PVC: A comparison of suspension‐ and emulsion‐prepared polymers

Crugnola¹,

Zoppi²,

Moraglio³

1969

J of Applied Polymer Sci

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synopsisWe have investigated the high temperature mechanical behavior of several unplasticized emulsion-and suspension-prepared whole polymers, and carried out molecular weight, molecular weight distribution, and branching characterization studies on these same materials. It is concluded that the easier workability of the emulsion product is probably due to the absence of a considerable amount of high molecular weight polymer in these as compared to suspension-prepared polymers of equal average molecular weight as reflected by intrinsic viscosity determinations of Fikentscher K values.

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IR spectroscopic study of the temperature behaviour of conformational transitions in polyvinylchloride

Cited by 10 publications

References 6 publications

Visible Range Photocatalysts for Solid Phase Photocatalytic Degradation of Polyethylene and Polyvinyl Chloride

Visible Range Photocatalysts for Solid Phase Photocatalytic Degradation of Polyethylene and Polyvinyl Chloride

Influence of composition on physical and mechanical properties of modified PVC

High‐temperature mechanical behavior of PVC: A comparison of suspension‐ and emulsion‐prepared polymers

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