Polímeros e a indústria automobilística

Hemais, Carlos A.

doi:10.1590/s0104-14282003000200008

Cited by 28 publications

(29 citation statements)

References 2 publications

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“…Plastics have high reliability index and many advantages over traditional materials such as steel, aluminum and glass. About 100 kg of plastics are used inside and/or outside the vehicle [1] . In the European automotive industry, the plastics or thermoplastics materials contribute to 10% of the total weight of the vehicle, and about 41% of this material are made up of polypropylene (PP), 20% polyamide or nylon (PA), 14% ABS, 6% PC, 6% polyacetal (POM), 5% poly (butylene terephthalate) (PBT), 2% poly (methyl methacrylate) (PMMA), and other materials.…”

Section: Introductionmentioning

confidence: 99%

“…The disadvantages are: flammability, low impact resistance, deterioration by thermal and environmental action, etc. However, in accordance with the required specification of the material to be used, there may be a type of polymer specially produced to meet the requirements of use, overcoming a disadvantage found in a common plastic [1] . There are several types of polymers applied to the component parts of vehicles, such as the instrument panel, the bumpers, the upholstery, the carpets, the head and tail lamps, as well as in the door trim panels and in the roof.…”

Section: Introductionmentioning

confidence: 99%

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FT-IR methodology (transmission and UATR) to quantify automotive systems

2018

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ObstractWhen using Fourier transform infrared spectroscopy (FT-IR) under the qualitative aspect for characterization of polymer blends, often a simple identification of each one of the existing polymers in the blend does not justify the material failure since different amounts of each component may result in different mechanical properties, which should be a possible cause for of material failure when applied to an automotive part. Thus, seeking for a better justification in the understanding of material failure analysis, a new quantitative FT-IR methodology was developed in the mid-infrared region (MIR), using the transmission techniques and universal attenuated reflectance for the determination of Acrylonitrile Butadiene Styrene (ABS) and polycarbonate (PC). Transmission mode was more suitable. The relative band (A 831 /A 2237 ) was chosen for the preparation of the calibration curve that showed a 0.99% error methodology, which is within the FT-IR spectrometer accuracy limit (≤ 2%); therefore, it is accurate for the analysis of the system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FT-IR methodology (transmission and UATR) to quantify automotive systems

2018

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“…A substituição de materiais como metais e vidros por polímeros em diversos segmentos da indústria se deu de forma progressiva ao longo dos anos, desde que se observou que os mesmos atendem aos requisitos de aplicação e oferecem algumas vantagens em relação a esses outros materiais, as quais incluem a facilidade de processamento, flexibilidade de design, resistência à corrosão e a produtos químicos e características térmicas e mecânicas que atendem às necessidades na maioria dos casos, além de permitirem economia na produção e menor peso final de produtos [1]. Com o crescimento da indústria de polímeros como…”

Section: Introductionunclassified

“…Surgiram assim os desafios no que diz respeito à modificação de polímeros já existentes e a preparação de materiais com base nesses polímeros, como misturas poliméricas, compósitos e compostos com diferentes formas de aditivação, produzidos com características variáveis conforme a necessidade da aplicação. A obtenção desses novos polímeros com estrutura química diferenciada ampliou a aplicação desses materiais e hoje eles aparecem com predominância em uma gama de produtos no mercado [1,2].…”

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Utilização de Elastômeros como Modificadores de Impacto em Poliamidas

Rocetto

Zeni

Brandalise³

2016

Sci. cum Ind.

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A utilização de elastômeros como modificadores de impacto em blendas poliméricas é um assunto continuamente explorado em estudos que buscam aprimorar o desempenho de polímeros frágeis, sem a necessidade de grandes investimentos em produção como o desenvolvimento de novos polímeros para aplicações específicas. As poliamidas são polímeros de engenharia com propriedades térmicas e mecânicas atrativas, porém apresentam limitações na resistência ao impacto, principalmente em baixas temperaturas e na presença de entalhe, característica que pode ser modificada com a presença de uma fase elastomérica dispersa na matriz. Existem diversos fatores que influenciam na tenacificação de poliamidas e de polímeros frágeis em geral com elastômeros, que vão desde as propriedades físicas, mecânicas e térmicas isoladas de cada componente da blenda, às características da mistura, como a termodinâmica, compatibilidade, adesão e tensão interfacial, forma de obtenção e condições de processamento, até as propriedades finais da blenda como o comportamento térmico, dinâmico-mecânico e a morfologia que é extremamente importante e define o comportamento mecânico do material tenacificado. Esses tópicos são abordados nesta revisão, trazendo os aspectos importantes em relação aos elastômeros e suas misturas com poliamidas com o objetivo de tenacificação, e ainda resultados de estudos realizados ao longo dos anos até os dias de hoje com diferentes tipos de poliamidas e de elastômeros, que auxiliam no entendimento do comportamento destes tipos de blendas. Palavras-chaveElastômeros, modificadores de impacto, poliamida, blendas poliméricas, tenacificação. Use of Elastomers as Impact Modifiers in Polyamides AbstractThe use of elastomers as impact modifiers in polymeric blends is a continuously explored subject in studies that aim to improve the performance of brittle polymers, without requiring large investments in production and development of new polymers for specific applications. Polyamides are engineering polymers with attractive thermal and mechanical properties. However, they still present limitations in impact behavior, especially at low temperatures and in the presence of notch, a characteristic which can be solved with the presence of a rubbery phase dispersed on the matrix. There are several factors that influence the toughening of polyamides and brittle polymers in general with elastomers, which go from physical, mechanical and thermal properties of each isolated component of the blend, to the characteristics of the mixture, such as thermodynamics, compatibility, adhesion and interfacial tension, processing ways and conditions, until the final properties of the blend, as thermal and dynamic-mechanical behavior and the morphology, which is extremely important and defines the mechanical behavior of the toughened material. These issues are approached on this review, bringing the important aspects regarding elastomers and their blends with polyamides for toughening, and also discussion from studies conducted over the years to the present day...

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“…Besides, they offer the possibility of more modern designs and increased resistance to corrosion, to name a few. Some important examples of polymers applied in this industry will be discussed in the next paragraphs [3]. DCPD corresponds to a thermoset that has high impact resistance, flexibility and rigidity, quality surface finish, corrosion resistance, great resilience, low density, and excellent electrical insulation properties.…”

Section: Introductionmentioning

confidence: 99%

Study and Application of DCPD Telene, PU.R.RIM and Pp-Td 20 Materials in Aesthetic Components for Trucks

Oliveira¹,

Soares²,

Medina³

2014

ABM Proceedings

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The trucking industry is constantly seeking improvement and cost reduction of their vehicles, studying new lighter and robust materials to meet the needs of its customers. The objective of this work is to study the application of DCPD Telene, PU. R. RIM and PP-TD 20 materials in aesthetic components of trucks: bumper, calender, upper and lower bracket and side air deflector. A multifunctional work team was created to work in such parts of IVECO trucks. The work began with an analysis of possible improvements to the current parts and followed the subsequent phases: definition of new materials, virtual modeling, new tools, and durability test in vehicles. It could then be verified that the proposed DCPD Telene, PUR. RIM and PP-TD 20 materials showed greater strength, better painting surface, and reduced weight and cost in parts.

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Polímeros e a indústria automobilística

Cited by 28 publications

References 2 publications

FT-IR methodology (transmission and UATR) to quantify automotive systems

FT-IR methodology (transmission and UATR) to quantify automotive systems

Utilização de Elastômeros como Modificadores de Impacto em Poliamidas

Study and Application of DCPD Telene, PU.R.RIM and Pp-Td 20 Materials in Aesthetic Components for Trucks

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