Polymers Engineering

ethanol and ethylene glycol. The results showed that the ESC action was intensified with the rising radiation doses when the relaxation tests were done under ethanol. On the tests under ethylene glycol the ESC effect was observed only to the irradiated polymer through the higher dose and under the higher relaxation load. The fracture surface analysis of tested relaxation samples, under ethanol, showed a dendritic pattern formed on fracture surfaces. Keywords: degradation, gamma…

1996. Mills, N.J. “Plastics – Microstructure & Engineering Applications”, 2nd.ed, Univ. of Birminghan, Edward Arnold, 1993. Fouhy, K. et al. “Plastics Recycling Diminishing Return”, Chemical Engineering, p. 30-34, dez. 1993. Wiebeck, .H. “Tecnologia de Reciclagem”, in: “Tecnologia de Reciclagem do Plástico”, apostila do curso de Reciclagem de Plásticos, promovido pelo ATUALTEC/CECAE-USP, S. Paulo, 1996. Scott, G. “Mechanisms of Polymer Degradation and Stabilization”, Elsevier…

BEACHLEY, V.; WEN, X. Effect of electrospinning parameters on the nanofiber diameter and length. Materials Science and Engineering. Vol. 29 (2009), pp. 663. BURGER, C.; HSIAO, B. S.; CHU, B. Functional nanofibrous scaffolds for bone reconstruction. Annu. Rev. Mater. Res. Vol. 36 (2006), pp. 333. BUTAFFOCO, L et al. Electrospinning of collagen and elastin for tissue engineering applications. Biomaterials. Vol. 27 (2006), pp. 724. GUERRINI, L.; BRANCIFORT, M.; BRETAS, R. Eletroafiação do…

SYMPOSIUM ON POLYMERS SLAP, 8., 2002, Acapulco. Proceedings... Acapulco: Sociedad Polimérica de México A.C. 2002. p. 599-600. Avaliação do Efeito Cicatrizante da Quitosana por Aplicação Tópica em Ratos ASSIS, O. B. G.; SILVA, V. L. Caracterização Estrutural e da Capacidade de Absorção de Água em Filmes Finos de Quitosana Processados em Diversas Concentrações. Polímeros: Ciência e Tecnologia, São Carlos, v. 13, n. 4, p. 223-228, 2003. BONASSAR, L. J.; VACANTI, C. A. Tissue…

mostrando picos referentes à perda de massa. Palavras-chave: Fibras de bananeira; análise térmica; TGA/DTG; DSC. CHARACTERIZATION BY THERMAL ANALYSIS OF BANANA FIBERS Abstract Banana fibers have been studied as a potential reinforcement for polymer composites due to the relative tensile strength. However, the effect of increasing temperature on the fibers behavior has not yet been investigated. Therefore, the objective of this work was to perform a thermal analysis on banana…

Tenacidade,.... Tipos de tensões que uma estrutura esta sujeita • • • • Tração Compressão Cisalhamento Torção Vídeo !! Deformação elástica: comportamento elástico não linear     In some materials (many polymers, concrete, grey cast iron...), elastic deformation is not linear, but it is still reversible. To determine a modulus of elasticity, either tangent or secant modulus is normally used. Tangent modulus – slope at some specified…

various X. Lu, W. A. Yee, S. Xiong, G. Ding, C. A. Nguyen, P. S. Lee, J. Ma School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore E-mail: asxhlu@ntu.edu.sg M. Kotaki Division of Advanced Fibro Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan Y. Liu Institute of Materials Research & Engineering, 3 Research Link, 117602, Singapore a : Supporting information for this article is available…

tecnólogos e engenheiros”, Artliber Editora Ltda, 2 ed. 2006.(Livro texto) - BILMEYER, F.; “Textbook of Polymer Science”, Wiley, 2 ed., 1971. - RODRIGUEZ, F.; “Principles of Polymer Systems” McGraw Hill Chem. Eng. Series, 82. - FLORY, P.J.; “Principles of Polymer Chemistry”, Cornell Univ. Press 1953. - WILLIAMS, D. J.; “Polymer Science and Engineering”, Prentice-Hall Inc. 1971. - SCHULTZ, J.; “Polymer Materials Science”, Prentice-Hall Inc. 1974. - BROSTOW, W., CORNELIUSSEN, R. D.(…

Universidade Federal do Rio de Janeiro – UFRJ Instituto de Macromoléculas Professora Eloisa Mano - IMA Pultrusion EVANS, David. Pultrusion. In: Encyclopedia of polymer science and engineering: 2. ed. New York: John Wiley & Sons, 1986. vol.13 p.660-665. Taíssa Zangerolami Lopes Disciplina: MMP-710 Introdução ao Seminário de Mestrado Orientador:Elizabete Fernandes Lucas Rio de Janeiro 2012 INTRODUÇÃO O que é Pultrusão? Pultrusão do inglês, to pull = puxar Processo…

Without worrying about their decomposition or disposal, these materials based on polymers go into the environment and can take years to decompose. This paper presents the viability of using vegetable fibers in the composition of polymeric materials in order to ensure lightness and robustness of the products and the accelerated decomposition of the polymer). (Other important advantages of inserting vegetable fibers in the polymers are the guarantee of higher mechanical strength and of…