Polimeros-ciencia E Tecnologia
Papers 2,692
1 page of 270 pages (2,692 results)
#1Yilmaz Anil Gunbekler (Muğla University)
#2Hilmi Toker (Muğla University)H-Index: 9
Last. Ergun Baysal (Muğla University)H-Index: 14
view all 5 authors...
Abstract This study was designed to investigate physical properties such as color changes after weathering and water absorption (WA) levels, and combustion performance of borates-impregnated and LG-coated Oriental beech wood. Results showed that borates impregnated and LG-coated Oriental beech wood showed positive lightness stability after weathering. The best color stabilization was obtained with LG-coated Oriental beech. Except for the 1 h WA period, LG did not show a water repellent effect af...
#1Miguel Guerreiro (University of Minho)
#1Miguel Pereira Guerreiro (University of Minho)
Last. José A. Covas (University of Minho)H-Index: 31
view all 7 authors...
Abstract Environmental concerns and the urgent need for reduction of fossil fuel consumption motivate materials research towards increased transportation efficiency. This work investigates the possibility of reducing the weight of electrical cables in automotive applications by replacing part of the metallic screen with electrically conductive polymer/carbon nanotube (CNT) nanocomposites. PP and PA12 were tested as possible matrices and the melt processability of the composites prepared by melt ...
#1Cao Xuan Viet (HCMUT: Ho Chi Minh City University of Technology)H-Index: 5
#2Hanafi Ismail (USM: Universiti Sains Malaysia)H-Index: 51
Last. Nabil Hayeemasae (PSU: Prince of Songkla University)H-Index: 7
view all 4 authors...
Abstract A silane coupling agent, namely γ-aminopropyltriethoxysilane (APS), was used to modify kenaf powder (KP). It was then used as filler in a thermoplastic elastomer (TPE) based on Recycled High Density Polyethylene/Natural Rubber Blends (rHDPE/NR). The attachment of silane onto KP was verified by Fourier Transform Infrared Spectroscopy (FTIR), while the performance of the TPE was assessed in terms of mechanical and thermal properties. The results revealed that specific functional groups of...
#1João Miguel Ayres Melillo (UFOP: Universidade Federal de Ouro Preto)
#2Iaci M. PereiraH-Index: 3
Last. Fernando Gabriel da Silva Araújo (UFOP: Universidade Federal de Ouro Preto)H-Index: 7
view all 4 authors...
Abstract Fused Filament Fabrication, better known as Fused Deposition Modeling®, is currently the most widespread 3D Printing Technology. There has been a significant demand for developing flame-retardant filaments. Thereby enabling them, for example, in electronics and automotive applications. In this study, commercial PLA filament was modified by the addition of 1, 3 and 5% (%wt.) of expandable graphite. The composites were reprocessed, via extrusion, into filaments for Fused Filament Fabricat...
#1Fabianne Lima (FUFPI: Federal University of Piauí)
#2Wanderson Gabriel Gomes de Melo (FUFPI: Federal University of Piauí)
Last. Ana Cristina Vasconcelos Fialho (FUFPI: Federal University of Piauí)H-Index: 2
view all 9 authors...
Abstract To produce polysaccharide-based hydrogels and cerium (Ce3+) doped hydroxyapatite plus chitosan and collagen to enable future applications in the treatment of joint degeneration. Hydrogel production and characterization were performed with Fourier transform infrared spectroscopy (FTIR), thermogravimetry analysis (TGA) and cytotoxicity testing with MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide]. A final biomaterial composition was Kelcogel® Gelana (58%), chitosan (22.3...
#1Laura de Andrade Souza (UFRGS: Federal University of Rio Grande do Sul)
#2Edson Luiz Francisquetti (IFRS: Federal Institute of Rio Grande do Sul)H-Index: 2
Last. Cesar Liberato Petzhold (UFRGS: Federal University of Rio Grande do Sul)H-Index: 23
view all 7 authors...
Abstract A new oleic acid derivative plasticizer, epoxidized trimethylolpropane trioleate (EPO), has been synthesized and its application in PVC formulations compared with di(2-ethylhexyl) 1,2-cyclohexanoate (DOCH/DEHCH), a commercial phthalate-free plasticizer of petrochemical origin. EPO and their blends with DOCH were added to PVC resin (50 PHR) and the plasticized PVC has been characterized by thermal and mechanical measurements. EPO demonstrated good compatibility with the PVC resin improvi...
#1Joelma Correia Beraldo (UNICAMP : State University of Campinas)
#2Gislaine Ferreira Nogueira (UEMG: Minas Gerais State University)H-Index: 8
Last. Carlos Raimundo Ferreira Grosso (UNICAMP : State University of Campinas)H-Index: 35
view all 4 authors...
Abstract The protein adsorption on the porous alginate microparticles was evaluated in regards to the coating ability and this protective effect during gastrointestinal assay. The coating was performed at suitable pH for optimized electrostatic interaction between protein and alginate. Concentrations of gelatin (HGE) and their hydrolysates (Collagel® (MGE) (> 10 kDa) and Fortigel® (LGE) (3 kDa)) from 1 to 10% (w/w) were tested. Higher protein adsorption was observed in the highest concentration ...
#1Marcos Danilo Costa de Almeida (UFRGS: Federal University of Rio Grande do Sul)H-Index: 1
#2João Antonio Pessoa da Silva (UFRGS: Federal University of Rio Grande do Sul)H-Index: 2
Last. Ruth Marlene Campomanes Santana (UFRGS: Federal University of Rio Grande do Sul)H-Index: 19
view all 6 authors...
Abstract In this work, a bio-based adhesive is prepared from Protium heptaphyllum resin. The resin is first characterized by 1H and 13C nuclear magnetic resonance spectroscopy and the bioadhesive is then prepared using a simple mixture of the resin with linseed oil, catalyzed by cobalt octanoate, to induce crosslinking. The precursors and bioadhesive obtained are characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy...
#1Hatice UlusoyH-Index: 2
Last. Hüseyin PekerH-Index: 7
view all 3 authors...
Abstract In the study, sweetgum tree (Liquidambar orientalis), which is an endemic species that grows in Mugla, Koycegiz and is applied for medicinal purposes among the public, its leaves was examined. The antioxidant ability of the extract obtained from dried plant leaves has been evaluated using a variety of methods which are Total Phenolic Substance, Total Flavonoid, FRAP, CUPRAC, DPPH, and ABTS+. Simultaneously, the antimicrobial activity of the plant extract was examined using disk diffusio...
#1Romaildo Santos de Sousa (UFPR: Federal University of Paraná)H-Index: 2
#2Alan Sulato de Andrade (UFPR: Federal University of Paraná)H-Index: 5
Last. Maria Lucia Masson (UFPR: Federal University of Paraná)H-Index: 22
view all 3 authors...
Abstract This study aimed to evaluate the process of cellulose extraction from yacon stem using combined pulping and bleaching processes to produce nanofibrillated cellulose (NFC). First, a chemical pulping process with NaOH was applied and, subsequently, the pulp obtained was bleached. From the chemical pulp (CP) bleached, NFC was obtained by the mechanical defibrillation in a colloidal grinder. Then, chemical composition, and infrared analysis of the pulps were performed. The pulping process s...
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