Compatibilizer Agent
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Mechanical properties, morphology and thermal degradation of a biocomposite of polypropylene and curaua fibers: coupling agent effect
Biocomposites of polymers with vegetal fibers have a broad spectrum of applications due to their high specific properties in comparison to their counterparts made with fiberglass. Polypropylene, PP, composites with curaua fiber compatibilized with different concentrations of maleic anhydride grafted polypropylene, PP-g-MA, were characterized according to the
Polímeros. Publicado em: 05/04/2013
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14. Influence of compatibilizer on blends degradation during processing
The thermomechanical degradation of blends made from polypropylene and polystyrene, with or without compatibilizer, was studied using an internal mixer coupled to a torque rheometer. The blends processed without compatibilizer presented regular and expected results regarding torque reduction, with evidence of chain scission. The blends processed with the blo
Polímeros. Publicado em: 20/02/2013
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15. Efeito da incorporação de fibras curtas de sílica amorfa em compósitos de polipropileno utilizados pela indústria automotiva nacional. / Effect of the incorporation of short amorphous silica fibers in polypropylene composites used by the national automotive industry.
The addition of silica fibers in polypropylene (PP) composites was investigated on this work as a proposal to develop new materials used in automotive industry, in order to enable the reduction of vehicle weight and the resulting fuel economy. The fibers are lightweight, made of amorphous silica and treated with amine silane for better interaction with the p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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16. Citric acid as multifunctional agent in blowing films of starch/PBAT
Citric acid was used as a compatibilizer in the production of starch and PBAT films plasticized with glycerol and processed by blow extrusion. Films produced were characterized by WVP, mechanical properties, FT-IR-ATR and SEM. WPV ranged from 3.71 to 12.73×10-11 g m-1 s-1 Pa-1, while tensile strength and elongation at break ranged from 1.81 to 7.15 MPa and
Química Nova. Publicado em: 2011-09
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17. Estudo da tenacificação do poliestireno com elastômeros butadiênicos / Polystyrene toughening by butadiene elastomers
This Dissertation describes a study about the toughening of polystyrene with different types of polybutadiene (high-cis, low-cis and styrene - butadiene diblock or triblock copolymers). These materials (High Impact of PolyStyrene HIPS) were performed by melt blending. The mechanical properties (hardness, tensile strength and impact strength); morphology and
Publicado em: 2009
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18. Rheological evaluation of polymer-modified asphalt binders
Currently, the most used polymer for asphalt binder modification is the thermoplastic elastomer styrene butadiene styrene (SBS) and aromatic oil is commonly added to the mixtures to improve their compatibly. This paper proposes the use of oil shale from sedimentary rock as a compatibilizer agent for polymer-modified asphalt binder (PMB). PMBs were produced b
Materials Research. Publicado em: 2008-09
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19. Modificação do Poli(hidroxibutirato) PHB com nucleantes e com o copolímero (etileno-co-acetato de vinila) - EVA
In this work, we sought to modify PHB, processing it in the melted state, and to evaluate the effect of the modifications on its mechanical properties and biodegradation characteristics. The following systems were therefore studied: a PHB/EVA blend, in a 90/10 ratio, with an ethylene-co-vinyl acetate copolymer containing 28% of VA; a PHB and PHB/EVA blend wi
Publicado em: 2008
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20. A comparative study of effect of compatibilization agent on untreated and ultrasonically treated waste ground rubber tire and polyolefin blends
The development of thermoplastic elastomer blends from waste tire powder and two polyolefins, Viz. maleic anhydride grafted polypropylene and LDPE, was studied. The polymer blends were processed using a twin-screw extruder equipped with a well-designed screw configuration. The blends studied contained a dispersed phase of waste rubber powder obtained from wa
Polímeros. Publicado em: 2006-12
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21. Recuperação de Borracha EPDM Utilizando EPDM Modificado com Dodecanotiol como Agente Compatibilizante / Recuperation of the EPDM Vulcanized Waste Using EPDM Modified by Dodecanethiol as Compatibilizing Agent
In this work, the compatibilization technique was employed to recycle the ethylenepropylene- ethylidenenorbonene (EPDMR) vulcanized rubber. For this purpose, ethylenepropylene ethylidenenorbonene (EPDM) functionalized with dodecanethiol (EPDMDDSH) was prepared and used with compatibilizing agent. EPDM compositions containing EPDMR in different proportions we
Publicado em: 2006
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22. Estudo das propriedades de nanocompositos de polipropileno/polipropileno grafitizado com anidrido maleico e montmorilonita organofilica
The study of nanocomposites, object of this project, was divided in two independent experimental parts. In the first esperimental part the obtention of organophilic montmorillonite from the cation xchange of a Na-montmorillonite for cations of quaternary hexadecyl trimethyl ammonium bromide, in aqueous solution, to prepare polymeric nanocomposites was studie
Publicado em: 2005
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23. Propriedades mecanicas e termicas, morfologia e reologia de blendas de poliamida-6 e elastomeros
Blends of polyamide-6 (PA-6) and elastomers is the central subject of this thesis. The work can be subdivided in three parts according to the type of rubber used, each part has specific objectives. In the first part, the mechanical properties and phase morphology of ternary blends of polyamide 6 with rubber, e.g., maleated ethylene-propylene random copolymer
Publicado em: 1999