PVC Orientado Avaliação de Processo de Orientação e das Propriedades Mecânicas em Função da Razão de Estiramento

Medeiros, Felipe Albuquerque; Wiebeck, Hélio

doi:10.4322/polimeros.2013.067

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Comparing costs and material durability between the NPT and CPT, the first takes advantage over the second when considered the time factor: each new trap made of PVC has a cost of approximately US$ 5 against US$ 1 considering all the material used for the confection of the conventional trap; however, PVC pipes have high resistance to corrosion and the action of time, they last around 25 years, can reach 45 with good care and maintenance (Medeiros & Wiebeck 2013), Table 1 Abundance (n), relative abundance (% in parentheses), species richness (S), Shannon-Wiener diversity (H′), Jaccard's similarity (I), and trophic preference of collected beetles by family, including the theft rate of baits (%), in five different locations in comparing both trap designs, new pitfall traps (NPTs) and conventional pitfall traps (CPTs). while plastics made of polyhydroxybutyrate (base material of CPTs) have a durability estimated from 6 months to 2 years (Pachekoski et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Optimized Pitfall Trap Design for Collecting Terrestrial Insects (Arthropoda: Insecta) in Biodiversity Studies

2018

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Pitfall traps are commonly used for the collection of terrestrial insects in ecology and biology studies; they are relatively straightforward to manufacture and there is a large variety of models described in the literature. However, they present a few drawbacks: (i) the removal and transport of the collected material are not practical; (ii) they have low resistance and durability; (iii) they fail to correctly protect the attractive bait against adverse weather conditions and scavengers, and (iv) evaporation of the liquid used inside the trap. We proposed an optimized pitfall trap design for terrestrial insect collection made from cheap and easily accessible materials. The new design allows the transfer of the collected material to the lab by removing only that part of the trap where the insects have been captured; the other part remains in its original place. Thus, the proposed trap allows easier operation since there is no need to transport water to replenish the traps after each transfer; in addition, there is less volume and weight to be carried. The trap can remain in the field for months because of the durability of its material. Furthermore, the collected material is better protected against adverse weather conditions and scavengers. Currently, an efficient and rapid sampling strategy in the field is of global interest to understand mechanisms that can contribute to the monitor changes in phenology, succession, and biodiversity.

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Section: Discussionmentioning

confidence: 99%

Optimized Pitfall Trap Design for Collecting Terrestrial Insects (Arthropoda: Insecta) in Biodiversity Studies

2018

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“…The expanded PS is very light, rigid, and opaque, thus acquiring excellent barrier and impact properties, making it suitable to protect fragile products. 50,53,60 2.2.4. Polyethylene terephthalate.…”

Section: Non-renewable-based Polymers Applied To Food Packagingmentioning

confidence: 99%

“…The polymerization among vinyl chloride monomers produces polyvinyl chloride (PVC), Fig. 2(e), 60 generating an amorphous, transparent, ductile, striated, dense, and brittle material that can be heat sealed. 47,50,57…”

Section: Non-renewable-based Polymers Applied To Food Packagingmentioning

confidence: 99%

Nanocomposites based on the graphene family for food packaging: historical perspective, preparation methods, and properties

et al. 2022

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Simulação Computacional Por Elementos Finitos E Validação Experimental De Tubos De PVC Solicitados À Flexão

Souza¹,

Santos²,

Pereira³

et al. 2015

Anais Do Congresso Nacional De Matemática Aplicada À Indústria

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Resumo: O Policloreto de Vinila (PVC) é um polímero com diversas possibilidades de aplicação, cuja utilização é crescente, em substituição a outros materiais. Um dos principais motivos deste crescimento é o seu baixo custo, se comparado ao emprego de materiais tradicionais. Contudo, os polímeros possuem propriedades mecânicas diferentes de materiais metálicos ou cerâmicos. Um polímero que vem sendo bastante empregado é o PVC, principalmente na produção de tubos destinados ao transporte de fluidos, notadamente a água fria, em instalações prediais. Buscando avaliar o emprego de tubos de PVC como componentes estruturais solicitados à flexão simples, este trabalho apresenta uma simulação numérica, por meio do Método de Elementos Finitos (MEF). Foram realizados ensaios de flexão no Sistema de Ensaios MTS, e seus resultados confrontados com os obtidos numericamente, por meio de ferramentas computacionais CAE e CAD, para a validação da análise numérica realizada. Constata-se o quão os tubos de PVC são bastantes resistentes à flexão, o que possibilita uma maior possibilidade de seu emprego para fins estruturais, além do seu uso corrente, de transporte de água fria. A partir deste estudo, tem-se maiores informações do comportamento estrutural de tubos de PVC, permitindo maior aplicabilidade deste elemento estrutural de baixo custo e de fácil aquisição e manuseio.

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PVC Orientado Avaliação de Processo de Orientação e das Propriedades Mecânicas em Função da Razão de Estiramento

Cited by 3 publications

References 6 publications

Optimized Pitfall Trap Design for Collecting Terrestrial Insects (Arthropoda: Insecta) in Biodiversity Studies

Optimized Pitfall Trap Design for Collecting Terrestrial Insects (Arthropoda: Insecta) in Biodiversity Studies

Nanocomposites based on the graphene family for food packaging: historical perspective, preparation methods, and properties

Simulação Computacional Por Elementos Finitos E Validação Experimental De Tubos De PVC Solicitados À Flexão

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