Academic literature on the topic 'Polymères – Dégradation'
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Journal articles on the topic "Polymères – Dégradation"
Michel, Alain. "Modification, dégradation et stabilisation des polymères." Comptes Rendus Chimie 9, no. 11-12 (November 2006): 1329. http://dx.doi.org/10.1016/j.crci.2006.10.001.
Full textCourvoisier, Emilie, Yoann Bicaba, and Xavier Colin. "Analyse de la dégradation thermique du Poly(éther imide)." Matériaux & Techniques 105, no. 4 (2017): 402. http://dx.doi.org/10.1051/mattech/2018006.
Full textBONNIN, Estelle, Michel LESSIRE, Nathaële WACRENIER, and Fabien ALLEMAN. "Les polymères de mannose en production animale. 2. Les enzymes de dégradation des mannanes dans l’alimentation des porcs et des volailles." INRAE Productions Animales 33, no. 4 (April 6, 2021): 295–306. http://dx.doi.org/10.20870/productions-animales.2020.33.4.4634.
Full textAudouin, L., X. Colin, B. Fayolle, and J. Verdu. "Dégradation et réticulation des polymères linéaires – Traitement des données relatives à la distribution des masses molaires et à l'analyse sol-gel." Matériaux & Techniques 96, no. 3 (2008): 103–9. http://dx.doi.org/10.1051/mattech:2008033.
Full textDissertations / Theses on the topic "Polymères – Dégradation"
Saadi, Zoubida. "Etude de la dégradation fongique des polymères : cinétique de dégradation des polymères et caractérisation des sous-produits de dégradation : étude de l'écotoxicité de ces polymères." Le Mans, 2008. http://cyberdoc.univ-lemans.fr/theses/2008/2008LEMA1004.pdf.
Full textSubject of current events, the biodegradability of polymers is always studied in a global context, that is to say, with regards to fungi and bacteria together. The present research project focuses on the purely fungal degradation of polymers. Apart from the core research, the results of this study suggest certain applications to reduce environmental problems : - to deteriorate materials with a specific fungal strain. - to better control the kinetics of the biodegradation of plastics (mulching films, packaging materials). - Accelerate bio-degradation. After selecting non-toxic fungi present in natural states (compost, soil) and verifying the inertness of PLLA and PBAT on fungal cultures, cellular growth tests in a glucose-free environment revealed a selectivity among fungi for certain polymeric substrata. The tests also highlighted the major role temperature plays in the fungal degradation of polymers. When temperatures get closer, or go beyond the glass transition temperature, the physical structures are more accessible to fungal enzymes. After determining fungal consortium in the degradation of PLLA and PBAT, respiration measurements in soil and compost, both sterilized then sowed, have confirmed temperature as the essential parameter of biodegradation. Taking place in unmodified soil and compost, the kinetics of biodegradation of these polymers revealed a fungi-bacterial synergy during biodegradation tests. This study of biodegradation – refined with a follow-up of the physical and chemical properties of the polymers – led to a better understanding of the various stages of hydrolysis as well as the mineralization of polymers. These investigations had to take into account the characterization of metabolizing products of PLLA and PBAT and a regular toxicity check for the environment
Torres, de Dominguez Angeles. "Dégradation et biodégradation de polymères d'acide lactique." Montpellier 1, 1995. http://www.theses.fr/1995MON13506.
Full textBlaz̆ek, Jaroslav. "Étude des schémas réactionnels de dégradation thermique des polymères." Toulouse, INPT, 2005. http://ethesis.inp-toulouse.fr/archive/00000218/.
Full textThe present work on pyrolysis of polymers was developed on laboratory scale. A thermogravimetric apparatus connected to FTIR spectrometer was used, the outputs of analyses were a set of mass loss data correlated with heating rates and a set of spectra corresponding to different moments of the degradation process. Kinetic parameters (Ea and A) were calculated by the means of the Popescu's variant of the Ozawa-Flynn-Wall integral method. A good agreement was found between calculated values and referential kinetic parameters. Another method, 'fitting' experimental curves by the means of a special MatLab programs using differential equations solvers, was applied in the case of several polymers. It was used in the study of pyrolysis of individual polymers and their mixtures, and it did - together with examination of results from FTIR analysis - yield results that were applied on industrial niveau. The polymers used were two “natural polymers”, lignin and cellulose, and industry polymers: PVC, EVA, PS. In comparisons with reference kinetic parameters, a good accordance was observed in most cases. Principal results for the polymer examined most in detail, i. E. EVA (e. G. With 12 % of VA in molecules; 1-30 K. Min-1), are: Ea = 200 kJ. Mol-1 for the 1st degradation step and Ea = 271 kJ. Mol-1 for the 2nd degradation step.
Maunand-Tussot, Corinne. "Polyimide-amides thermostables : microstructure - mécanismes de formation - mécanismes de dégradation." Lyon 1, 2000. http://www.theses.fr/2000LYO10130.
Full textBelloncle, Benjamine. "Synthèse, dégradation et bio-propriétés du polyglyoxylate d'éthyle." Phd thesis, INSA de Rouen, 2008. http://tel.archives-ouvertes.fr/tel-00558791.
Full textDuchatel, Xavier. "Dégradation thermo-oxydante du poly(fluorure de vinylidène)." Rouen, 1996. http://www.theses.fr/1996ROUES009.
Full textDupas, Adeline. "Dégradation mécanique de solutions de polymères et ses impacts en récupération assistée d'hydrocarbures." Phd thesis, Université de Bretagne occidentale - Brest, 2012. http://tel.archives-ouvertes.fr/tel-00830622.
Full textLatappy, Hubert. "Étude des COV issus de la dégradation thermique et oxydative des matériaux polymères." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01059771.
Full textAudibert-Hayet, Annie. "Stabilité thermique de polymères hydrosolubles en relation avec leurs applications pétrolières." Rouen, 1994. http://www.theses.fr/1994ROUES012.
Full textMboungou, Eric. "Etude des phénomènes liés à la dégradation des matériaux polymères sous champ électrique en présence d'humidité." Besançon, 2006. http://www.theses.fr/2006BESA2026.
Full textThe goal of this work is to understand the phenomena at the origin of the degradation of surface of insulating polymeric materials under electric field in the presence of moisture. For that, we carried out an experimental setup reproducing in laboratory the conditions of the use of equipments. Materials made by resins epoxy and unsaturated polyester were studied. The materials containing epoxy resin differ by nature of fillers while those containing resin polyester differ by nature from the matrix and fillers. The stay in immersion in pure water showed hydrolysis of the matrix and an absorption of water more important of materials containing polyester. The electric behaviour of materials appears identical when they don’t contain water. When they contain water, the electric performances depend at the same time on the nature of the matrix, the fillers and the quantity of water present in materials. Ageing is characterized by an increase of leakage current on the surface, an appearance of the light (more important in dry phases). The explanation of this phenomenon seems in agreement with the model of degradation by the formation of dry bands. The analyses in infra-red microscopy showed chemical modifications characterized by the disappearance of the C-H bonds of the ethyl and methyl groupings. This work highlighted the important role of moisture in the degradation of composite materials under electric stress. It permitted to define the conditions under which the presence of moisture can affect the equipments and modify their insulation properties
Books on the topic "Polymères – Dégradation"
Photodegradation of polymers: Physical characteristics and applications. Berlin: Springer, 1996.
Find full textMercier, Jean-Pierre. Chimie des polymères: Synthèses, réactions, dégradations. Lausanne: Presses polytechniques et universitaires romandes, 1993.
Find full textMaréchal, Ernest, and Jean-Pierre Mercier. Traité des matériaux, tome 13 : Chimie des polymères. Synthèses, réactions, dégradations. Presses polytechniques et universitaires romandes, 1996.
Find full textHorie, C. V., M. Edge, and Norman S. Allen. Polymers in Conservation (Special Publication (Royal Society of Chemistry (Great Britain))). Royal Society of Chemistry, 1992.
Find full textS, Allen Norman, Edge Michele, Horie C. V, and Royal Society of Chemistry (Great Britain). Information Services., eds. Polymers in conservation. Cambridge [England]: Royal Society of Chemistry Information Services, 1992.
Find full textBook chapters on the topic "Polymères – Dégradation"
Gourbeyre, Y. "Annexe 5 : La dégradation des polymères." In Circuits de refroidissement semi-ouverts, 125–32. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2448-9-015.
Full textGourbeyre, Y. "Annexe 5 : La dégradation des polymères." In Circuits de refroidissement semi-ouverts, 125–32. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2448-9.c015.
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