Morphological characteristics of polyvinyl chloride (PVC) dechlorination during pyrolysis process: Influence of PVC content and heating rate

Cao, Qiongmin; Yuan, Guang; Yin, Leilei; Chen, Dezhen; He, Pinjing; Wang, Hai

doi:10.1016/j.wasman.2016.08.031

Cited by 58 publications

(17 citation statements)

References 23 publications

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“…In the first, in the temperature range of about 260-340 ∘ C, the autocatalytic dehydrochlorination of PVC macromolecules and the release of the decomposition product in the form of HCl in an amount of approx. 53 wt% related to PVC mass occurs [27,33,34]. At the same time, in the structure of macromolecules in reactive points, after separation of the Cl • and H • radicals, formation of double bonds and creation of polyene groups take place.…”

Section: Resultsmentioning

confidence: 99%

“…In the upper part of the test tube, Congo test paper was inserted to the depth of 3 mm. The tube was placed in a stand so as to immerse its end in an oil bath heated to 200 ∘ C. The result of the test is the time after which the material is destroyed and hydrogen chloride as a PVC decomposition product [27], determined as the first visible change in the colour of the test paper, is released. The results presented are the average of three measurements.…”

Section: Determination Of Processabilitymentioning

confidence: 99%

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Recycled Glass Fibres from Wind Turbines as a Filler for Poly(Vinyl Chloride)

Lewandowski

Skórczewska

Piszczek

et al. 2019

Advances in Polymer Technology

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This paper presents the method of using glass fibre with carbon deposit (GFCD), derived from the recycling of wind turbine blades, for production of composite materials based on poly(vinyl chloride) (PVC). Composite materials containing from 1 to 15 wt% of GFCD were produced by plasticising with a plastographometer and then by pressing. The processability and performance were studied. Mechanical properties in static tension, impact strength, and thermal stability were determined. Glass transition temperature was also determined by means of the dynamic mechanical thermal analysis (DMTA). The GFCD percentage of up to 15 wt% was found not to slightly affect the change in the processability, thermal stability, and glass transition temperature. PVC/GFCD composite materials are characterised by a definitely greater elastic modulus with simultaneous decrease of tensile strength and impact strength. An analysis with scanning electron microscopy revealed good adhesion between the filler and the polymer matrix.

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Section: Resultsmentioning

confidence: 99%

Section: Determination Of Processabilitymentioning

confidence: 99%

Recycled Glass Fibres from Wind Turbines as a Filler for Poly(Vinyl Chloride)

Lewandowski

Skórczewska

Piszczek

et al. 2019

Advances in Polymer Technology

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“…The first weight loss stage occurs at ~251°C, which most probably originates from the dehydrochlorination of PVC and the formation of double bonds. [ 40 ] After removal of HCl, the pristine PVC is thermally stable between 295°C and 429°C, as the conjugated double bonds provide additional stability to the polymeric chain. [ 30 ] The second weight loss stage occurs between 300°C and 475°C, which can be attributed to the breakage of single and multiple covalent bonds (polyacetylene cracking).…”

Section: Resultsmentioning

confidence: 99%

Effects of inorganic‐organic surface modification on the mechanical and thermal properties of poly(vinyl chloride) composites reinforced with fly‐ash

Xue

Nan

et al. 2021

Polymer Composites

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Fly ash (FA) derived from the combustion of coal is considered a potential reinforcing filler for polymers, but its application is somewhat limited by the number of hydroxyl groups on the surface. In this study, FA was modified with sodium hydroxide (NaOH) (denoted as OH-FA), resulting in an increase in the number of OH groups on the surface of FA and thus improvement of the interfacial adhesion between FA and polyvinyl chloride (PVC). OH-FA was subjected to ball milling to induce mechanochemical activation aided by a new polyether titanate coupling agent (ETi 4) (denoted as M-ETi 4-OH-FA). The results show that the functional groups of ETi 4 can interact with the OH groups on the surface of FA via electrostatic interactions, chemical interactions, intra-and intermolecular hydrogen bonds by ball milling, which can increase the compatibility and interfacial bonding between FA and PVC, and improve the mechanical and thermal characteristics of PVC composites. Significantly, the impact strength and yield strength of M-ETi 4-OH-FA/PVC composite reaches 6.2 kJ/m 2 and 64.9 MPa, which is increased by 86.8% and 13.6% compared with that of PVC, and by 18.2% and 14.6% compared with that of ETi 4-OH-FA/PVC, respectively. The thermal stability is also higher than that of other PVC composites, and the rapidest degradation temperature reaches 297 C, which is 16 C higher than that of pure PVC.

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“…studied the dechlorination behavior of PVC in the mixed plastic pyrolysis with a high‐speed infrared camera, and emission of hydrogen chloride was detected. The study also helped in finding out the start and termination of HCl release . Yuan et al.…”

Section: Introductionmentioning

confidence: 97%

Thermal decomposition study of polyvinyl chloride in the presence of commercially available oxides catalysts

et al. 2017

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The pyrolysis behavior of polyvinyl chloride (PVC) in the presence of commercially available oxides catalysts was investigated using thermogravimetry. The pyrolysis proceeded under a heating rate of 5°C/min in the temperature range of 200-650°C.The thermogravimetric properties in terms of reduction in maximum degradation temperature and percent conversion were studied. The silica gel mesoporous catalyst, with a greater pore size and surface area, was found to be the most active materials in terms of reduction in maximum degradation temperature and increase in percent conversion. The alumina acidic, silica ppt, and alumina neutral catalysts also showed good results; however, their effects were less pronounced as compared to silica gel. The effects of these different catalysts show that surface area, pore size, and number of acidic sites are found to be the major factors for the energy efficient degradation of polymers. K E Y W O R D Scatalytic thermal degradation, number of acidic sites, polyvinyl chloride, pore size, reduction in maximum degradation temperature, surface area

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Morphological characteristics of polyvinyl chloride (PVC) dechlorination during pyrolysis process: Influence of PVC content and heating rate

Cited by 58 publications

References 23 publications

Recycled Glass Fibres from Wind Turbines as a Filler for Poly(Vinyl Chloride)

Recycled Glass Fibres from Wind Turbines as a Filler for Poly(Vinyl Chloride)

Effects of inorganic‐organic surface modification on the mechanical and thermal properties of poly(vinyl chloride) composites reinforced with fly‐ash

Thermal decomposition study of polyvinyl chloride in the presence of commercially available oxides catalysts

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