Polymers Engineering

tension, oil swelling, oil viscosity reduction, wettability modification or favorable phase behavior. The use of polymer injection in heavy oil reservoirs is the subject of extensive studies since its implementation does not depend of major technological devices, requiring only mixing and filtration equipments in addition to those already used for common water injection. Moreover, polymers are not toxic or corrosive and can generate favorable mobility ratios in both borders of the…

p. 589611, 1958. Woodruff , M.A.; Hutmacher, D.W. The return of a forgotten polymer— Polycaprolactone in the 21st century. Progress in Polymer Science 35, 2010, p. 1217–1256. Amass, W.; Amaass, A.; Tigue, B. A review of biodegradable polymers: uses, current developments in the synthesis and characterization of biodegradable polyesters, blends of biodegradable polymers and recent advances in biodegration studies. Polymer International. v. 47, p. 89-144, 1998. Sinha, V.R, ET AL.…

ADVANTAGES OF POLYHYDROXYBUTYRATE (BIODEGRADABLE PLASTIC) ABSTRACT From the beginning of the last century to the current days the use of polymers has become more frequent in the society. Have a incredible amount of devices produced by the man and that use polymers as raw material to its different elaborations. The initial search for synthetic polymers was based on its relative inertia and resistance biodegradation. Due to this durability, the enormous amount of garbage produced in…

Tissue Engineering in Dentistry Luciano Casagrande1, Isabel da SilvaLauxen2, Marilene Issa Fernandes3 1 Mestre e Doutor em Odontologia - Odontopediatria, Professor Adjunto de Clínica Odontológica – Faculdade de Odontologia da UNIFRA Abstract 2 Advances in molecular and cellular biology have contributed to the development of techniques to repair, or even regenerate, organs and tissues that have been injured by diseases, traumas and congenital deformities. Tissue…

Conformação ç Para o n-butano Gauche (=60º e -60º) Trans (=π) ( π) Eclipsada p J.M.G. Cowie, Polymer Chemistry and Physics of Modern Materials; 2nd Edition, Blackie Academic and Professional 1991 C f Conformação ã Zig-zag planar (toda trans) → estável Polietileno (sindiotático) Hélice (g e t) Ex. Polímero com substituinte grande William D Callister, Material Science and Engineering, Wiley and Sons, 1999 Conformação Zig-zag planar (toda trans) → estável gauche (ng/nt )=…

para o desenvolvimento tecnológico da síntese de novos polímeros. Em 1960 surgem vários periódicos especializados em polímeros entre eles Journal of Polymer Science, Makromolekulare Chemie e Polymer . Desde então vários outros periódicos especializados surgiram na comunidade a saber Journal of Polymer Engineering and Science (1961), European Polymer Journal (1965), Journal of Macromolecular Science (1967), Macromolecules (1968) e outros. O avanço científico e tecnológico na…

VITAE ADDRESS Department of Biomedical Engineering The University of Texas at San Antonio San Antonio, TX 78249 Telephone: (210) 458-6646 Email: rena.bizios@utsa.edu CITIZENSHIP U.S.A. EDUCATION Massachusetts Institute of Technology, Cambridge, MA Ph.D. in Biomedical Engineering California Institute of Technology, Pasadena, CA M.S. in Chemical Engineering University of Massachusetts, Amherst, MA B.S. (Cum Laude) in Chemical Engineering RESEARCH AND TEACHING…

Materials Science and Engineering An Introduction John Wiley & Sons, Inc. Materials Science and Engineering An Introduction William D. Callister, Jr. Department of Metallurgical Engineering The University of Utah with special contributions by David G. Rethwisch The University of Iowa S E V E N T H E D I T I O N Front Cover: A unit cell for diamond (blue-gray spheres represent carbon atoms), which is positioned above the temperature-versus-logarithm pressure phase diagram…

ARTICLE IN PRESS POLYMER TESTING Polymer Testing 26 (2007) 315–322 www.elsevier.com/locate/polytest Material Behaviour Toughness behavior of gamma-irradiated polycarbonate ´ Naylor Sardinha de Melo, Ricardo Ponde Weber, Joao Carlos Miguez Suarezà ˜ ˆnica e de Materiais, Instituto Militar de Engenharia, Prac a General Tibu ´rcio 80, Sec a de Engenharia Meca - ˜o 22290-270 Rio de Janeiro, RJ, Brazil Received 28 September 2006; accepted 8 October 2006 Abstract The toughness…

correlation between the variation in overall velocity vibration and wear rate of a PTFE polymer in contact with AISI 4140 steel submitted to dry sliding tests in the flat-cylinder configuration. A normal load of 5N and sliding velocity of 1 m/s were applied for a sliding distance of approximately 1000m. During the tests, vibration and room temperature data were collected as well as near the contact. The polymer wear rate was calculated from the measurement of mass loss. Results showed…