Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Rita de Cássia L. Dutra"'
Autor:
ALAN PASSERO, KARYN M. FERREIRA, MILTON F. DINIZ, NATALIA B. SANCHES, JAVIER CARLOS Q. AMADO, RITA DE CÁSSIA L. DUTRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 96, Iss 3 (2024)
Abstract The blend of butadiene and acrylonitrile copolymer (NBR) with natural poly-cis-isoprene (NR) shows increased resistance to swelling in solvents in comparison to the individual components. In aerospace, NBR rubber is used as thermal protectio
Externí odkaz:
https://doaj.org/article/c2f1cd4530c14da8b2475bf694532836
Autor:
SABRINA SARA ROSSI, ALEXANDRE ESTEVÃO CARRARA, MARIA CAROLINA B. COSTA, CAIO LUCAS G.P. MARTINS, RITA DE CÁSSIA L. DUTRA, JORGE CARLOS N. DUTRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 2 (2023)
Abstract This study describes a methodology to prepare and characterize PUF [poly(urea formaldehyde)] microcapsules containing 5-ethylidene-2-norbornene (ENB) as self-healing agent, as well as the compatibility evaluation of ENB in the presence of Gr
Externí odkaz:
https://doaj.org/article/03384386679c4cd1bf23542da817a470
Autor:
ALEXANDRE ESTÊVÃO CARRARA, VINÍCIUS HENRIQUE DE S. RODRIGUES, RITA DE CÁSSIA L. DUTRA, JORGE CARLOS N. DUTRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss 2 (2023)
Abstract A considerable number of papers have been published to assess self-healing capacity of several materials, as well as several applications in different areas. However, the impact assessment of changing synthesis parameters of microcapsules, h
Externí odkaz:
https://doaj.org/article/b7ad2d29f54d451b8c7c974b390c7197
Autor:
ALEXANDRA HELENA DE BARROS, LIDIA M.S. MURAKAMI, RACHEL F. MAGALHÃES, MARCIA M. TAKEMATSU, MILTON F. DINIZ, NATÁLIA B. SANCHES, JORGE CARLOS N. DUTRA, RITA DE CÁSSIA L. DUTRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss 1 (2022)
Abstract Quantification of elastomer content for the ethylene-propylene diene monomer/polybutadiene blend are seldom subjects in the literature, mainly due to rubber compatibility problems. However, suitable blend contents can lead to desirable prope
Externí odkaz:
https://doaj.org/article/ac542976c07d459c9d2a465af2964378
Autor:
DANIEL ANDERSON JANZEN, MILTON F. DINIZ, JOYCE B. AZEVEDO, JULIANO R.A. PINTO, NATÁLIA B. SANCHES, RITA DE CÁSSIA L. DUTRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 93, Iss 2 (2021)
Abstract Epoxy systems are widely applied as adhesives in the aerospace industry. They have excellent adhesion properties, however, being thermosetting, epoxy systems show fracture brittleness characteristics. Polysulfide and polymercaptans are good
Externí odkaz:
https://doaj.org/article/83f690093db144238d494f5cccd382d3
Performance evaluation of commercial copper chromites as burning rate catalyst for solid propellants
Autor:
Milton Faria Diniz, Eunice Aparecida Campos, Luis Cláudio Rezende, Rita de Cássia L. Dutra, Wilma Massae Dio Nawa, Koshun Iha
Publikováno v:
Journal of Aerospace Technology and Management, Vol 2, Iss 3, Pp 323-330 (2010)
Copper chromites are well known as burning rate catalysts for the combustion of composite solid propellants, used as a source of energy for rocket propulsion. The propellant burning rate depends upon the catalyst characteristics such as chemical comp
Externí odkaz:
https://doaj.org/article/560a16bf8791483381c8b03f122e5768
Autor:
Gilson da Silva, Koshum Iha, Andreza M. Cardoso, Elizabeth C. Mattos, Rita de Cássia L. Dutra
Publikováno v:
Journal of Aerospace Technology and Management, Vol 2, Iss 1, Pp 41-46 (2010)
2,2’, 4,4’, 6,6’- hexanitrostilbene (HNS) is an energetic material, a nitroaromatic compound, with thermal and chemical stabilities, which is employed in the aerospace industry. In this work, the Arrhenius parameters (activation energy and pre-
Externí odkaz:
https://doaj.org/article/9cbb4c5687bb4d9185ac70cdd01d7177
Publikováno v:
Journal of Aerospace Technology and Management, Vol 1, Iss 2, Pp 167-175 (2009)
A new methodology was developed to characterize and to quantify the polymer content in PBX (HMX/Viton) by Fourier Transform Infrared Spectroscopy (FT-IR), using the Termogravimetric analysis (TG) as reference techniques for the quantitative method. T
Externí odkaz:
https://doaj.org/article/fee06b4d328745b28441f62786047275
Autor:
Darci C. Pires, Denise V. B. Stockler-Pinto, Jairo Sciamareli, Jorge Roberto da Costa, Milton Faria Diniz, Koshun Iha, Rita de Cássia L. Dutra
Publikováno v:
Journal of Aerospace Technology and Management, Vol 1, Iss 2, Pp 177-184 (2009)
Reactions to obtain hydantoin derivatives were carried out with 5,5-dimethylhydantoin and short-chain aldehydes. Monitoring of the reactions was performed using qualitative mid-infrared spectroscopy (MIR) through the formation of new bands characteri
Externí odkaz:
https://doaj.org/article/86a5f39d3ee4441ab8fcc4fac5d5091c
Publikováno v:
Journal of Aerospace Technology and Management, Vol 1, Iss 2, Pp 153-160 (2009)
The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP (ammonium perchlorate). Endeavors seemed to come to an end when ADN (ammonium dinitramide) appeared in the West
Externí odkaz:
https://doaj.org/article/1d8a590d4d404acbbecf43e9f4e7b7f3