Blends Of Polystyrene
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Influência do envelhecimento termo-oxidativo nas propriedades mecânicas e de amarelamento de blendas de poliestireno com borracha reciclada de estireno-butadieno (SBR)
RESUMO Este trabalho teve como objetivo avaliar o envelhecimento termo-oxidativo, nas propriedades mecânicas e de índice de amarelamento (YI), de blendas de poliestireno com borracha reciclada (SBRr), compatibilizadas. As blendas foram preparadas, inicialmente, em uma extrusora de rosca dupla corrotacional e, posteriormente, os grânulos extrudados foram m
Matéria (Rio J.). Publicado em: 16/09/2019
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2. Tayloring PS/PCL blends: characteristics of processing and properties
Abstract Blends of Polystyrene (PS) and Poly(ε-caprolactone) (PCL) were twin screw extruded, two PSs, with low and high melt flow rate (MFR) were used and their feasibility within PCL investigated by means of torque rheometry, mechanical tests, heat deflection temperature (HDT) and scanning electron microscopy (SEM); predictive models were utilized to evalu
REM, Int. Eng. J.. Publicado em: 2019-03
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3. Toughening of polystyrene using styrene-butadiene rubber (SBRr) waste from the shoe industry
Abstract The vulcanized rubber waste from the shoe industry causes environmental damage when it is incinerated or inappropriately discarded, turning this into a problem of major concern. Therefore, this study had as the main objective the Polystyrene (PS) toughening using different contents of white vulcanized styrene-butadiene rubber (SBRr) waste produced i
REM, Int. Eng. J.. Publicado em: 2018-04
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4. Thermal degradation of polymer systems having liquid crystalline oligoester segment
Abstract Block copolymers and blends comprised by liquid crystalline oligoester and polystyrene were prepared and their thermal stability were characterized by thermogravimetric analysis (TGA). The samples have shown three main decomposition temperatures due to (1) lost of flexible chain and decomposition of mesogenic segment, (2) decomposition of polystyren
Polímeros. Publicado em: 2017-12
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5. Influence of SEBS-MA and SBS compatibilizers on properties and morphology of blends of polystyrene/rubber residue (SBRr) from the footwear industry
Abstract The reuse of rubber waste is very important today, both to reduce the harmful effects on the environment, and to reduce the cost of new material development. Considering that most of the studies reported in literature refer to the reuse of tire waste, this article aims to evaluate the influence of styrene-butadiene-styrene (SBS) and styrene-(ethylen
REM, Int. Eng. J.. Publicado em: 2017-06
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6. The Effect of Polystyrene on the Crystallization of Poly(3-hydroxybutyrate)
Mechanical properties, morphology and nonisothermal crystallization of poly(3-hydroxybutyrate) (PHB) and blends of PHB and polystyrene (PS) were studied by tensile tests, scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). A two-phase structure composed by a PHB matrix and nearly spherical particles of PS was clearly noticed in SE
Mat. Res.. Publicado em: 2015-04
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7. Effect of polystyrene on poly(ethylene terephthalate) crystallization
Blends of poly(ethylene terephthalate) (PET) and polystyrene (PS) with PS content ranging from 0% to 60% by weight, were compounded in a laboratory internal mixer, followed by quenching into iced water, resulting in substantially amorphous compounds. Blend morphology was analyzed by scanning electron microscopy (SEM). Standard differential scanning calorimet
Mat. Res.. Publicado em: 2014-12
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8. Evaluation of the effect of the incorporation of rubber tire waste particles on the properties of PP, HIPS and PP/HIPS matrices
In recent years, the consumption of plastics has been increasing and as consequence, the waste generated has also increased. Rubber tire (RT) waste is another residue which causes significant problems to society. In view of the considerable amounts of RT waste generated, this study aimed to evaluate the influence of the incorporation of RT particles into pos
Polímeros. Publicado em: 16/04/2013
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9. 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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10. Efeito de agentes de compatibilização em blendas de PS/EPDM
This dissertation describes a study about the toughening of polystyrene with EPDM to obtain higher photooxidative properties and a good balance of impact and tensile properties in comparison to commercial HIPS. Linear triblock copolymers SEBS or SBS were used as compatibilizers to obtain better properties. PS/SBS and PS/SEBS blends were also prepared to inve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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11. 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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12. Propriedades dielétricas e térmicas das blendas de poliestireno com ácido oléico e polietireno com betacaroteno / Properties dielétricas and thermal of the blends of polystyrene with oleic acid and polietireno with Beta-Carotene
The thermal, dielectrics and optics properties of vegetable oils have been studied by Amazonian Materials Physic Group since 1996 in the Department of Physic of UFPA. Recently collaboration with Physical-chemistry of polymer Laboratory in the Chemistry Institute of UnB allowed studying these oils and its components as polymeric blends. In this work, we searc
Publicado em: 2008