Polymer

comes from greek word, which means “plastikos” meaning moldable (2). Plastics are the group of materials or organic compounds produced by the process of polymerization which are capable of being shaped, extruded, cast through applying heat (3). Polymers on the other hand are the larger molecules which are made of chains or rings which linked with many monomer units with high melting and boiling point (4). Thermoplastics are the materials that can be re-melted and reused, by applying high temperature

Self-healing polymers are extremely sought after by scientists, as they have many useful—not to mention lucrative—applications. Back in 2009, we reported a polyurethane-based polymeric material that heals itself in roughly an hour when exposed to UV light. That particular polymer, made by Biswajit Ghosh and Marek W. Urban, would be useful as a protective coating for phones, cars, etc. It worked based on the principle of having a reactive chemical component that would split open when physically damaged

Progress in Polymer Science 34 (2009) 948–968 Contents lists available at ScienceDirect Progress in Polymer Science journal homepage: www.elsevier.com/locate/ppolysci Adhesion of polymers Firas Awaja a,∗ , Michael Gilbert b , Georgina Kelly a , Bronwyn Fox a , Paul J. Pigram b a b Centre for Material and Fibre Innovation, Geelong Technology Precinct, Deakin University, Geelong, Victoria 3217, Australia Centre for Materials and Surface Science and Department of Physics, La Trobe University

Ionic Conductivity in Crystalline Polymer Electrolytes The ionic conductivity of a material is an essential property in order to evaluate its ability as an electrolyte in other words its ability to conduct current. In polymers electrolytes it was longer assumed that amorphous phase was the sole phase involved in the conductivity. However, the article this essay is based on, the authors try to prove that despite this prevailing view, the ionic conductivity in the crystalline structure can be greater

I) le Kevlar Le Kevlar est une fibre synthétique. C'est un matériau très résistant, il possède donc un fort réseau de liaisons covalentes (les + résistantes) et de liaisons hydrogènes, ce qui lui confère une grande rigidité. Sa résistance est utile à la fabrication d'équipements militaires comme des gilets par balles. II) le PVC Le PVC ou Polychlorure de Vinyle est un polymère thermo plastique. C'est une matière plastique très résistante au feu. Il possède un réseau de liaisons polaires. Ce

common engineering polymers Abstract A polymer is a macromolecule made of long chains of carbon atoms. This structure gives to the polymers special properties such as rubber elasticity. This investigation focuses on the rubber elasticity of the polymers. Different common polymers are tested on a machine that stretches the polymer at different speeds. The test shows that some polymers stretch whereas others break instantly due to the tensile force. The structure of the polymer determines whether

GOURDENNE A., LE VAN Q., « Intimate study of the microwave curing », American Chemical Society, Division of Polymer Chemistry, Polymer Preprints, vol. 22, 125 (1981). [I-7] GOURDENNE A., MASSARANI A. H., MONCHAUX P., AUSSUDRE S., THOUREL L., « Crosslinking of thermosetting resins by microwave heating : Quantitative approach », American Chemical Society, Division of Polymer Chemistry, Polymer Preprints, vol. 20, 471(1974). [I-8] GOURDENNE A., MONCHAUX P., LE VAN Q., AUSSUDRE S, THOUREL L., AUDO N.

dans les Polymères Polymer chains have a carbon–carbon backbone with hydrogen or other side groups. Cross-links bond the chains tightly together. The strong carbon–carbon bonds are shown as solid red lines. Source : Manufacturing Processes for Engineering Materials,5rd Edition., S. Kalpakjian and S. Schmid, 26 Microstructure: Mode d’empilement Source : Manufacturing Processes for Engineering Materials, 5th ed. Kalpakjian • Schmid Amorphous and crystalline regions in a polymer. Note that the crystalline

barrier properties Nadège Follain1*, Sébastien Alix2, Serge Bourbigot3, Jérémie Soulestin2 et Stéphane Marais1 1 : Laboratoire PBS, UMR 6270 & FR 3038 Université de Rouen – F-76821 – MONT SAINT AIGNAN CEDEX 2 : Ecole des Mines de Douai, Department of Polymers and Composites Technology & Mechanical Engineering Université de Lille Nord de France – F-59508 – DOUAI 3 : Département ENSCL, USTL, ISP-UMET, UMR 8207 CNRS Université de Lille Nord de France – F-59655 – VILLENEUVE D’ASCQ e-mail : nadege.follain@univ-rouen

émollient, conditionneur dérivé de lanoline acrylates copolymer Synthétique gélifiant gélifier les phases aqueuses, épaissir, augmenter la viscosité, fixateur capillaire plus efficace pour les bases lavantes acrylates/acrylamide copolymer Synthétique polymer fixateur capillaire, filmogène acrylates/C10-30 alkyl acrylate crosspolymer Synthétique gélifiant épaissir, gélifier alanine Synthétique actif conditionneur alcloxa Synthétique actif astringent algae Naturelle extrait végétal conditionneur