Polymers Additives
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends
The development of blends made from matrices of synthetic biodegradable polymers, and natural additives, are considered less environmentally aggressive materials. This work aimed to study the effects of gamma radiation on the properties of the thermoplastic starch (TPS)/poly(butylene adipate-co-terephthalate) (PBAT). In this work, blends of TPS/PBAT were pre
Mat. Res.. Publicado em: 14/10/2019
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2. Bio-based additives for thermoplastics
Abstract Presently, there are significant research efforts being undertaken to produce bio-based chemicals in a cost-effective way. The polymer chemists and engineers are no exception to this. Additives for polymers correspond to a large section of the plastics market and bio-based products can substitute many of them. The scientific literature has a large n
Polímeros. Publicado em: 10/06/2019
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3. Avaliação do efeito do tratamento corona na performance de estabilizadores de UV em filmes de PEBD
RESUMO A indústria de polímeros tem passado por muitos avanços na última década, dentre eles, podem-se citar as inovações em processamento e no uso de aditivos, o que permite que eles sejam utilizados em diversas aplicações, especialmente quando expostos ao ambiente externo. Porém, para algumas aplicações específicas, o polímero precisa ser sub
Matéria (Rio J.). Publicado em: 20/05/2019
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4. Mechanical and Microstructural Properties of Redispersible Polymer-Gypsum Composites
Studies on gypsum modified by polymers have been conducted to assess the potential of improvement in the mechanical performance, water resistance and increasing the setting time, facilitating its handling. Gypsum-based compounds made with different additions of redispersible polymers were studied, such as: ethylene-vinyl acetate (EVA), vinyl acetate terpolym
Mat. Res.. Publicado em: 25/04/2019
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5. Evaluación reológica de fluidos de perforación base agua con nanosílice
ABSTRACT Generally, drilling fluids may be defined as fluids with a composition that can assist the generation and removal of cuttings from the borehole to the surface. They are classified according to their base as water based mud (WBM), oil based mud (OBM) or gas. Polymers, densifiers, brines, surfactants, among others are the primary components of drillin
Matéria (Rio J.). Publicado em: 19/07/2018
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6. Estrategia para la optimización de un compuesto de caucho con aceite de soja utilizando diseños de experimentos
ABSTRACT When a rubber component is made, is necessary to start from a “rubber compound” which may be composed of one or more polymers and various additives or fillers. The development of an elastomer mixture to produce a compound with a specific end-use is complicated in the field of rubber technology. Therefore, the successful development of a compound
Matéria (Rio J.). Publicado em: 19/07/2018
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7. POLÍMERO BIODEGRADÁVEL ANTIMICROBIANO ATRAVÉS DA ADITIVAÇÃO COM COMPOSTOS À BASE DE ZINCO
Antimicrobial packaging is a promising type of active packaging, which has an antimicrobial agent incorporated into the polymer matrix, capable to eliminate or inhibit deteriorating and/or pathogenic microorganisms. The zinc compounds are antimicrobial agents commonly used to confer this feature. The objective of this work was to evaluate the antimicrobial a
Quím. Nova. Publicado em: 2018-04
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8. The Recycling of Sugarcane Fiber/Polypropylene Composites
Mechanical recycling is utilized to reuse waste and obtain other plastic products via the reprocessing of a material in industrial equipment. Natural fiber composites have become more popular in recent years; however, these composites' mechanical behavior remains less well-understood than single polymers’ behavior after recycling. Therefore, the objective
Mat. Res.. Publicado em: 2015-08
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9. The effect of additives interaction on the miscibility and crystal structure of two immiscible biodegradable polymers
Poly lactic acid (PLLA) is a promising biopolymer, obtained from polymerization of lactic acid that is derived from renewable resources through fermentation. The characteristic brittleness of PLLA is attributed to slow crystallization rates, which results in the formation of the large spherulites. Its glass temperature is relative high, above room temperatur
Polímeros. Publicado em: 2014
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10. In situ polymerized wood polymer composite: effect of additives and nanoclay on the thermal, mechanical properties
This study concerns the preparation and characterization of wood polymer nanocomposites based on impregnation of styrene acrylonitrile co-polymer-nanoclay intercalating system in presence of glycidyl methacrylate (GMA), a cross linking agent, and vinyl trichloro silane (VTCS) as additives into Simul (Bombex ceiba, L.), a soft wood. The effect of nanoclay and
Mat. Res.. Publicado em: 14/05/2013
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11. Use of new silica fillers as additives for polymers used in packaging of fruit
The objective of this work was to synthesize nanosilicas with different degree of hydrophobicity by the sol-gel method, using tetraethyl orthosilicate as a precursor. For this purpose, 3-aminopropyl triethoxysilane (APS) and 1,1,1,3,3,3 - hexamethyldisilazane (HMDS), were added during synthesis as modifiers. A commercial biopolymer (Hexamoll Dinch, BASF) int
Quím. Nova. Publicado em: 2012
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12. Cerâmicas refratárias resinadas: fundamentos, análise crítica e efeito dos agentes grafitizantes e antioxidantes / Resin-bonded refractories: fundamentals, critical analysis and the effect of the graphitizing agents and antioxidants
Improvements on carbon containing refractories are synonymous of benefits for the entire steel industry. In the last years, two particular developments deserve to be highlighted: (i) the report of additives able to graphitize the carbon fixed by the thermoset polymers used as refractory binders and (ii) the induction, by combining antioxidants, of in situ gr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011