Caracterização morfológica do poliestireno de alto impacto (HIPS)

Rovere, Juliana; Correa, Carlos A.; Grassi, Vinícius Galhard; Pizzol, Marcus Fernando Dal

doi:10.1590/s0104-14282008000100007

Cited by 15 publications

(14 citation statements)

References 14 publications

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“…It is a material with wide application in industrial goods, for example, it is used in the production of parts for electronic devices, including radios, televisions, and computers, as well as for machines and cars. It is also used in the footwear industry, among other applications [17] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of the Incorporation of Rubber Tire Waste Particles on the Properties of PP, HIPS and PP/HIPS Matrices

Montagna¹,

Bento²,

Silveira³

et al. 2013

Polímeros

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Abstract: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 post-consumer thermoplastic matrices such as polypropylene (PP), high impact polystyrene (HIPS) and PP/HIPS blends and the modification of the physical, morphological, rheological and mechanical properties. The particle sizes of the RT used were <500 and 500-1000 µm. The RT content was 10% w/w and the weight ratio for the PP/HIPS blend was 4/1, with processing by injection molding. The results showed that the smaller (500 µm) particle size led to a decrease in the melt flow rate (MFR) of the PP/RT composites (increased viscosity) and an increase for the HIPS/RT composites. On the other hand, the larger particles (1000 µm) led to a decrease in the mechanical performance of the PP/RT and HIPS/RT blends when compared with the neat polymers (PP and HIPS post-consumer). The observed decrease in the mechanical properties of these composites was due to weak filler/matrix interactions, which can be visualized in images by scanning electron microscopy (SEM) of the fracture surface after tensile testing.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of the Incorporation of Rubber Tire Waste Particles on the Properties of PP, HIPS and PP/HIPS Matrices

Montagna¹,

Bento²,

Silveira³

et al. 2013

Polímeros

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“…E uma das maneiras de solucionar esse problema é a tenacificação por meio uso de elastômeros como modificadores de impacto para esses materiais com a produção de blendas poliméricas. A mistura com elastômeros é reconhecidamente a técnica mais utilizada por grande parte das in¬dústrias de polímeros para aumentar a resistência ao impacto e a tenacidade desses materiais (ROVERE et al, 2008). Várias são as maneiras de obtenção de blendas e uma classificação destas pode ser feita por meio dos métodos de obtenção, que são: por solução, por reticulados poliméricos interpenetrantes (IPN) e por mistura mecânica no estado fundido.…”

Section: Blendas Poliméricasunclassified

Desenvolvimento de Blendas Poliméricas visando a Tenacificação dos Polímeros: Uma revisão

et al. 2015

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Polymers are materials of large use in the various sectors of the world economy. The use of polymeric materials in daily life, instead of the classic materials has increased in recent decades. However, for certain structural applications polymers need to get tougher. One of the principal toughening techniques based on physical mixture of two or more components, forming the so-called polymer blends. The addition of rubber or not vulcanized in polymer compositions is reported in the literature as a means of generating mixtures of easy processing, and economically advantageous to increase the toughness of the thermoplastic matrix of interest. Moreover, it can be an alternative for the recycling of waste tires and footwear coming from industries, as well reduce harmful effects on the environment. Therefore, the present study aims to present a review of the definitions, benefits, thermodynamic fundamentals and toughening polymers. ResumoPolímeros são materiais de grande utilização nos diversos setores da economia mundial. A utilização de materiais poliméricos no cotidiano, em substituição aos materiais clássicos vem crescendo nas últimas décadas. Porém, para determinadas aplicações estruturais os polímeros precisam ser tenacificados. Uma das principais técnicas de tenacificação se baseia na mistura física de dois ou mais componentes, formando as chamadas blendas poliméricas. A adição de borrachas ou desvulcanizados em composições poliméricas é apresentada na literatura como uma maneira de gerar misturas de fácil processamento, vantajosas economicamente e com aumento da tenacidade da matriz termoplástica de interesse. Além disso, pode ser alternativa para o reaproveitamento dos resíduos de pneus e calçados advindos de indústrias, bem como reduzir os efeitos nocivos sobre o meio ambiente. Portanto, o presente trabalho tem como objetivo apresentar uma revisão sobre as definições, vantagens, fundamentos termodinâmicos e tenacificação de polímeros.

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“…(Dal Pizzol, 2005;Rovere et al, 2008). Supernatant containing free polystyrene chains was separated and reserved.…”

Section: Polymer Characterizationmentioning

confidence: 99%

Influence of reaction operation conditions on the final properties of high impact polystyrene (hips)

Cunha

Costa

Nele

et al. 2013

Braz. J. Chem. Eng.

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-The main objective of the present work is to analyze the influence of some important operational reaction parameters (agitation speed, polybutadiene -PB -content and initiator concentration) on the final properties of High Impact Polystyrene (HIPS) produced in bulk. Variable effects are analyzed both qualitatively and quantitatively with the help of a fractional factorial design. Physical, chemical and mechanical properties were evaluated through measurement of the weight-average molecular weight (M w ), polydispersity (PD), volume-average diameter of PB particles (D(4,3)) and impact strength (Izod). It was found that PD and D(4,3) depend strongly on the initiator concentration, rubber concentration and agitation speed; Mw depends on initiator and rubber concentrations; and Izod depends on the rubber concentration, PD and D(4,3) in the analyzed experimental range. As a consequence, it was shown that control of final polymer properties can be easily performed through proper manipulation of the analyzed operational variables.

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Caracterização morfológica do poliestireno de alto impacto (HIPS)

Cited by 15 publications

References 14 publications

Evaluation of the Effect of the Incorporation of Rubber Tire Waste Particles on the Properties of PP, HIPS and PP/HIPS Matrices

Evaluation of the Effect of the Incorporation of Rubber Tire Waste Particles on the Properties of PP, HIPS and PP/HIPS Matrices

Desenvolvimento de Blendas Poliméricas visando a Tenacificação dos Polímeros: Uma revisão

Influence of reaction operation conditions on the final properties of high impact polystyrene (hips)

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