Vinyl Acetate Polymers

Cordeiro, Cajetan F.; Petrocelli, Francis P.

doi:10.1002/0471440264.pst383

“…These resins become very flexible when heated above 30°C and are essentially limp above 50°C (Cordeiro and Petrocelli, 2005). As described above, PVAc films have also been shown to be susceptible to degradation by microbes (Down, 2015a;Cappitelli and Sorlini, 2008;Lindemann and Tanner, 1985) and become brittle in temperatures below 15°C (e.g., during freeze treatment).…”

Section: Polyvinyl Acetate (Pvac) Resinmentioning

confidence: 95%

“…Disadvantages. PVAc resins are described as aging well (Cordeiro and Petrocelli, 2005), but they performed poorly in all aging categories in CCI's experiments Down (2015b , Table 13)-as poorly as Elmer's-and their low glass transition temperature leaves them sensitive to dust and debris accumulation.…”

Section: Polyvinyl Acetate (Pvac) Resinmentioning

confidence: 99%

A review of adhesives for entomotaxy

Deans

¹

2018

Preprint

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Insect specimens that are too small to be pinned safely are usually affixed to a piece of card on a pin or to the pin itself using an adhesive. This practice has been in place for more than two centuries, and >400,000 such mounts continue to be accessioned annually in collections. Entomologists appear to agree on the ideal properties of adhesives used in specimen preparation---that they remain (1) archival, (2) reversible, (3) easy to prepare and use, and (4) safe. There remains no consensus, however, regarding which adhesives satisfy these criteria. Entomologists continue to use fixatives they were taught to use (institutional inertia) or which have good initial working properties, even though their archivability and reversibility have never been tested or have been shown to be suspect. Museum professionals recently identified this topic, adhesives applied to natural history specimens, as one that could be informed by research and knowledge from other domains. This review includes a comprehensive list of adhesives used in entomotaxy, with brief summaries of their properties as examined in the contexts of archaeology, paleontology, art restoration, and polymer chemistry. The general conclusion is that no adhesive has the properties sought by entomologists, and several commonly used brands or classes of adhesive should never be used for entomotaxy, including most clear nail polishes, shellac, and certain polyvinyl acetate-based dispersions, like Elmer's Glue-All.

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“…These adhesives yield strong but flexible bonds between objects of diverse materials. Depending on additives present, some films may be dissolved or softened by come common and safe solvents (e.g., ethanol, acetone, and ethyl acetate; Cordeiro and Petrocelli, 2005). PVAc dispersions are also relatively safe, readily available, and inexpensive.…”

Section: Polyvinyl Acetate (Pvac) Dispersionsmentioning

confidence: 99%

A review of adhesives for entomotaxy

Deans

¹

2018

Preprint

1

0

View full text Add to dashboard Cite

Insect specimens that are too small to be pinned safely are usually affixed to a piece of card on a pin or to the pin itself using an adhesive. This practice has been in place for more than two centuries, and >400,000 such mounts continue to be accessioned annually in collections. Entomologists appear to agree on the ideal properties of adhesives used in specimen preparation---that they remain (1) archival, (2) reversible, (3) easy to prepare and use, and (4) safe. There remains no consensus, however, regarding which adhesives satisfy these criteria. Entomologists continue to use fixatives they were taught to use (institutional inertia) or which have good initial working properties, even though their archivability and reversibility have never been tested or have been shown to be suspect. Museum professionals recently identified this topic, adhesives applied to natural history specimens, as one that could be informed by research and knowledge from other domains. This review includes a comprehensive list of adhesives used in entomotaxy, with brief summaries of their properties as examined in the contexts of archaeology, paleontology, art restoration, and polymer chemistry. The general conclusion is that no adhesive has the properties sought by entomologists, and several commonly used brands or classes of adhesive should never be used for entomotaxy, including most clear nail polishes, shellac, and certain polyvinyl acetate-based dispersions, like Elmer's Glue-All.

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“…The synthetic polymeric resins are used in large scale in a wide variety of industrial and commercial activities. The VA is the most used compound over there resins‐polymer synthesis (Cordeiro & Petrocelli, 2004). The VA worldwide production is projected to reach approximately 7175 thousand tons by the end of 2023, increasing around 2–3% per year in the period 2017–2023.…”

Section: Introductionmentioning

confidence: 99%

Influence of oxygen on the vinyl acetate elimination pathway and microbial community structure of methanogenic sludge

Durán¹,

Monroy

²

,

Gómez

³

et al. 2022

Water Environment Research

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Methanogenic-aerobic coupled processes were used to biological degradation of vinyl acetate (VA) to provide evidence of oxygen role for their complete elimination from different angles. First, physiological characterization of a continuous methanogenic-aerobic reactor fed by VA and glucose (G) showed that by adding G, the VA got 100% hydrolyzed to acetate, and then, by adding 1 mgÁL À1 Ád À1 of dissolved oxygen (DO), this acetate got methanized by 40% and aerobically mineralized by 60%. Second, batch assays in the presence and absence of sodium azide suggest that VA at different concentrations was eliminated by both anaerobic and aerobic metabolic pathways, because without azide and in the presence of 1 mg DOÁL À1 increased methane and carbon dioxide formation rates at 80% and 75%, respectively. Finally, microbial population dynamics analysis of the reactor by DGGE-sequencing highlighted that Brevibacillus agri (aerobic) and Methanosarcina barkeri (anaerobic) were identified as responsible for VA elimination by up to 98.6%. Practitioner Points• Vinyl acetate is removed by simultaneous methanation and aerobic respiration.• Methanosarcina barkeri and Brevibacillus agri removed up to 99% of vinyl acetate.• DO and VA have a selective effect on the metabolism and population dynamics.

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Vinyl Acetate Polymers

Cited by 10 publications

References 83 publications

A review of adhesives for entomotaxy

A review of adhesives for entomotaxy

A review of adhesives for entomotaxy

Influence of oxygen on the vinyl acetate elimination pathway and microbial community structure of methanogenic sludge

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