Relevant bibliographies by topics / Stabilisation of PVC

Academic literature on the topic 'Stabilisation of PVC'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Stabilisation of PVC"

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Park, Geoffrey S. "Degradation and stabilisation of PVC." Polymer Degradation and Stability 11, no. 4 (January 1985): 381–82. http://dx.doi.org/10.1016/0141-3910(85)90040-0.

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Mellor, M. T. J. "Degradation and stabilisation of PVC." Polymer Photochemistry 6, no. 4 (January 1985): 319–20. http://dx.doi.org/10.1016/0144-2880(85)90014-4.

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Abed-Ali, S. S., W. R. McWhinnie, and G. Scott. "Stabilisation of PVC with organotellurium compounds." Polymer Degradation and Stability 21, no. 3 (January 1988): 211–25. http://dx.doi.org/10.1016/0141-3910(88)90028-6.

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Kazim Naqvi, Mohammad. "Thermal stabilisation of PVC—An alternative approach." Polymer Degradation and Stability 13, no. 2 (January 1985): 161–66. http://dx.doi.org/10.1016/0141-3910(85)90065-5.

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Hebrard, M., E. G. Lundquist, and J. Y. Cho. "New alternative to lead stabilisation for PVC pipes." Plastics, Rubber and Composites 37, no. 9-10 (December 2008): 425–30. http://dx.doi.org/10.1179/174328908x356608.

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Sauerwein, R. "New mineral additive for heat stabilisation of PVC." Plastics, Rubber and Composites 37, no. 9-10 (December 2008): 453–58. http://dx.doi.org/10.1179/174328908x362908.

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Ruijian, Xu, Zhou Dafei, and Zhao Deren. "Effect of organotin stabiliser on the thermal stabilisation of PVC: Part II—Structure changes in PVC and the mechanism of stabilisation." Polymer Degradation and Stability 28, no. 3 (January 1990): 323–30. http://dx.doi.org/10.1016/0141-3910(90)90071-e.

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Tran, V. H., T. P. Nguyen, and P. Molinié. "Thermal stabilisation of PVC via the polaron mechanism Part III: Stabilisation with organotin compounds." Polymer Degradation and Stability 53, no. 3 (September 1996): 279–88. http://dx.doi.org/10.1016/0141-3910(96)00002-x.

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Gilbert, Marianne, Kok Chin Ho, David J. Hitt, and Domagoj Vrsaljko. "Assessment of PVC stabilisation using hydrotalcites – Raman spectroscopy and other techniques." Polymer Degradation and Stability 98, no. 8 (August 2013): 1537–47. http://dx.doi.org/10.1016/j.polymdegradstab.2013.04.005.

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Okieimen, Felix E., and Oluyemisi C. Eromonsele. "Thermal stabilisation of PVC with metal soaps of Khaya seed oil." Die Angewandte Makromolekulare Chemie 269, no. 1 (August 1, 1999): 8–15. http://dx.doi.org/10.1002/(sici)1522-9505(19990801)269:1<8::aid-apmc8>3.0.co;2-6.

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Dissertations / Theses on the topic "Stabilisation of PVC"

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Martin, Glyn. "The stabilisation of PVC plastisol using hydrotalcite (HT)." Thesis, Swansea University, 2007. https://cronfa.swan.ac.uk/Record/cronfa42522.

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The main focus of this EngD Thesis is an investigation into the use of Hydrotalcite (HT) as a photodegradation stabiliser for polyvinyl chloride (PVC) used as a coating for pre-finished steel. The work builds on the use of model systems, both unplasticised and plasticised, in comparing HT with other commercial stabilisers and culminates with the full formulation and testing of paint systems containing all the relevant commercial pigments and stabilisers. In the first section of work, a flat panel reactor was used to accurately measure the rates of photogenerated carbon dioxide (CO2) as an in-situ measurement of degradation. In unplasticised PVC pigmented with 30% photoactive titanium dioxide, there was a transition to a higher rate of CO2 evolution after a set amount of degradation which is attributed to the formation of hydrochloric acid. In this instance, the addition of up to 10% HT in model system removes this catalytic effect as the HT exchanges chloride ions for carbonate. This initial result suggested that HT could be a useful stabiliser and the results on model systems showed it to be far more consistent in its performance over a wide range of concentrations compared to commercial barium/zinc and tin based stabilisers. In model films containing plasticiser molecules based on phthalates the effect of HCl catalysis was not found to occur. An increase in initial rate of CO2 evolution and an absence of HCl production indicates preferential attack on the plasticiser rather than the PVC matrix. When more sulphonic acid ester (phthalate free) systems are used, acidic fragments and HCl are produced and these lead to a similar acceleration in degradation with UV exposure time observed with PVC alone. This indicated that in such systems the addition of a stabiliser that could remove hydrochloric acid would be beneficial. In near commercial PVC plastisol systems prepared on steel substrates, HT has been compared to historic (tin), existing (barium zinc) and future (calcium zinc) stabilisers. In all cases, regardless of titanium dioxide grade, the HT performed very well in terms of colour retention and gloss following QUVA weathering cycles with the HT preventing dehydrochlorination within the coating which leads to darkening on exposure. In the final section of work completely stabilised and fully formulated paint systems were prepared using the HT and commercial stabilisation systems and exposed to extended QUVA and QUVB cycles. Even in these systems the HT is demonstrated to perform consistently and is in almost all respects superior to existing stabilisation chemistries. The positive effects are shown for both white and coloured systems. In a summary, it seems that HT is able to stabilise PVC coatings applied to steel substrates and exposed to arduous weathering cycles. This stabilisation reflects the ability of HT to remove hydrochloric acid within the film which reduces dehydrochlorination, coating darkening and degradation. HT is a cheap mineral material and is extremely easy to blend into paint and as such is a potentially promising pigment addition to make to painted product to reduce acid catalysed degradation.
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Delinière, Hélène. "Optimisation de la formulation d'un film PVC pour le revêtement de pièces automobiles." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Lille Douai, 2019. http://www.theses.fr/2019MTLD0010.

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Cette thèse fait l’objet de l’optimisation d’un film PVC plastifié destiné au revêtement de pièces automobiles extérieures et intérieures. L’évolution du profil colorimétrique, des propriétés mécaniques et viscoélastiques du film au cours de différents vieillissements artificiels à la lumière et à la température, associée à la décomposition du film en TGA-IR, permet de mieux comprendre les mécanismes de dégradation du film PVC étudié. Le rôle du stabilisant thermique présent dans la formulation est ainsi validé. En revanche, le système de stabilisation aux UV formé par le mélange 50-50 d’un absorbeur UV et d’un inhibiteur s’avère défaillant et est remplacé par le mélange d’un absorbeur UV à 75 % avec un inhibiteur radicalaire non basique à 25 %. La teneur du film pour un revêtement extérieur est donc améliorée. En vue d’étendre son utilisation à des revêtements intérieurs, le dégagement de composés volatils hors du film est étudié à des températures critiques. Le plastifiant s’avère responsable de cette migration et sa substitution par un polyadipate permet de limiter significativement cette migration. Le choix de ce plastifiant améliore également la plastification du PVC et rend le film adapté à l’application tridimensionnelle ciblée
This study focuses on the optimization of a plasticized PVC film intended for the coating of interior and exterior automotive parts. The evolution of the colorimetric profile, mechanical and viscoelastic properties of the film during different artificial aging and decomposition studies in TGA-IR leads to get a better understanding of the degradation mechanisms of PVC. Thus the role of the thermal stabilizer introduced in the initial formulation is confirmed. On the other hand, the UV stabilization system containing a 50-50 mix of a UV absorber and a hindered amine light stabilizer failed and was successfully replaced by a mix of 75 % of a UV absorber with 25 % of a non-basic hindered amine lighter. Consequently, the film durability for an exterior coating showed improvement. To extent its use to the coating of interior automotive parts, the release of volatile compounds was studied at critical temperatures. The plasticizer seems to be responsible for the migration out of the film, this release was significantly reduced by substituting it by polyadipate. The choice of this plasticizer further improves the PVC plasticization and makes the film suitable for the 3D application
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Phung, Kim Dang. "Stabiblisation d'ondes électromagnétiques." Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0010.

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Nous évoquons, dans cette thèse, le comportement en temps et la stabilisation uniforme de différents systèmes de maxwell dissipatifs. Nous distinguons les amortissements frontières (avec la condition absorbante de Silver-Muller) et les systèmes dissipatifs internes (avec la loi d'ohm ou intervient la conductivité). On détermine la géométrie et, ou le support des amortissements qui permettront de faire décroitre exponentiellement vite l'énergie du champ électromagnétique. On met en évidence numériquement, par le biais de rayons gaussiens, le lien entre le support des amortissements, la fréquence de l'onde et la décroissance de l'énergie du système des ondes. Nous étudions, également, quelques problèmes de contrôle approché et de furtivité à basse fréquence, à l'extérieur de l'obstacle pour le problème de Helmholtz fréquentiel, ou on utilisera les inégalités de Hardy et de Carleman.
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Conference papers on the topic "Stabilisation of PVC"

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García, Hugo. "Utilisation of Sheet Piles in the OCENSA’s Right of Way for Slope Stabilisation and Bioengineering Works." In ASME-ARPEL 2019 International Pipeline Geotechnical Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ipg2019-5336.

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Abstract On the maintenance carried out by OCENSA for slope stabilization in areas with geotechnical issues, protection of lateral streams’ banks, maintenance of the Right of Way (RoW) embankment or access roads, sheet piles have been successfully used. The paper describes the different alternatives and their uses. Among them are: terraces to facilitate drainage and plant recovery, PVC sheet piles for protection of stream banks, sheet piles made of carbon steel pipe and steel deck in which the piles can be driven by percussion or previously excavated with drilling machine.
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Schneider, Elena, Amsini Sadiki, Alexander Maltsev, and Johannes Janicka. "Numerical Study of the Precessing Vortex Core in a Confined Partially Premixed Swirl Combustion System." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27272.

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Swirl flows play an important role in modern combustion systems such as gas turbines, aero propulsion systems etc. Next to desirable effects such as enhanced mixing such flows often exhibit aerodynamical instabilities called precessing vortex core. The configuration under study here represents a model Gas Turbine(GT) combustion chamber and features the main properties of real gas turbine combustors: a confined swirled flow with multiple recirculation zones and reattachment points, resulting in reacting case in a partially premixed methane/air aerodynamically stabilised flame. This flame exibits also precessing vortex core (PVC). The present study especially concentrates on an evaluation of the performance of different URANS-based model-combinations in predicting this confined swirling reacting flow exhibiting such aerodynamic instabilities. For this purpose an extended Bray-Moss-Libby model and a G-equation based approach, both coupled to the mixture fraction transport equation to account for partially premixed effects, are applied. Their prediction potential in capturing partially premixed combustion properties is appraised by comparison with LDV, Raman and PLIF measurements. It turns out that the influence of the combustion model on simulation results of the flame front stabilisation or mean flow field is not obvious. Nevertheless it could be mentioned that the computation time with G-equation was approximately three times longer than with BML model due to the reinitialization needed in steady case calculations and 2 times longer in case of unsteady calculations.
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Novac, B. M., J. Walsh, and I. R. Smith. "Experimental studies of a self-synchronising, multi pin-plane, corona stabilisation closing switch." In 2011 IEEE Pulsed Power Conference (PPC). IEEE, 2011. http://dx.doi.org/10.1109/ppc.2011.6191502.

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