Biogenic fraction in the synthesis of polyethylene terephthalate

Jou, Renata M.; Macario, Kita C. D.; Carvalho, C. A. A. de; Dias, Rafael; Brum, Maria; Cunha, Fernando Reis da; Ferreira, Catarina G.; Chanca, Ingrid

doi:10.1016/j.ijms.2015.07.011

Cited by 15 publications

(11 citation statements)

References 14 publications

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“…An interesting method to determine the amount of biogenic fraction was presented by Jou et al [69] in their short communication on the use of Radiocarbon Accelerator Mass Spectroscopy for the isotopic fraction determination, according to ASTM-D6866 (Standard Test Methods for Determining the Biobased Content of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis). As reported by Montava-Jorda et al [70], bio-based polymers, either biodegradable or non-biodegradable, are certified as bio-based according to international standards such as EN 16640:2015, ISO 16620-4:2016, ASTM 6866-18 and EN 16785-1:2015.…”

Section: Bio-based Polyethylene Terephthalate (Bio-pet)mentioning

confidence: 99%

Bio-Polyethylene (Bio-PE), Bio-Polypropylene (Bio-PP) and Bio-Poly(ethylene terephthalate) (Bio-PET): Recent Developments in Bio-Based Polymers Analogous to Petroleum-Derived Ones for Packaging and Engineering Applications

2020

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In recent year, there has been increasing concern about the growing amount of plastic waste coming from daily life. Different kinds of synthetic plastics are currently used for an extensive range of needs, but in order to reduce the impact of petroleum-based plastics and material waste, considerable attention has been focused on “green” plastics. In this paper, we present a broad review on the advances in the research and development of bio-based polymers analogous to petroleum-derived ones. The main interest for the development of bio-based materials is the strong public concern about waste, pollution and carbon footprint. The sustainability of those polymers, for general and specific applications, is driven by the great progress in the processing technologies that refine biomass feedstocks in order to obtain bio-based monomers that are used as building blocks. At the same time, thanks to the industrial progress, it is possible to obtain more versatile and specific chemical structures in order to synthetize polymers with ad-hoc tailored properties and functionalities, with engineering applications that include packaging but also durable and electronic goods. In particular, three types of polymers were described in this review: Bio-polyethylene (Bio-PE), bio-polypropylene (Bio-PP) and Bio-poly(ethylene terephthalate) (Bio-PET). The recent advances in their development in terms of processing technologies, product development and applications, as well as their advantages and disadvantages, are reported.

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Section: Bio-based Polyethylene Terephthalate (Bio-pet)mentioning

confidence: 99%

Bio-Polyethylene (Bio-PE), Bio-Polypropylene (Bio-PP) and Bio-Poly(ethylene terephthalate) (Bio-PET): Recent Developments in Bio-Based Polymers Analogous to Petroleum-Derived Ones for Packaging and Engineering Applications

2020

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“…Em estudos de fração biogênica de polímeros e combustíveis (Jou et al 2015, Palstra & Meijer 2014, por exemplo, não é necessário calibrar os resultados, mas sim determinar o percentual de carbono biogênico a partir do resultado de "fração moderna" (Stuiver & Polach 1977) fornecido pelo laboratório. Na maior parte das aplicações, no entanto, é fundamental proceder à calibração das idades de radiocarbono utilizando a curva apropriada.…”

Section: Idades Calibradasunclassified

Efeito de reservatório marinho na costa do Brasil

Macario

Alves

2018

ABEQUA

Self Cite

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ResumoEm estudos cronológicos de processos ocorridos nos últimos 50 mil anos, a datação de carbono 14 é a abordagem mais utilizada em todo o mundo. Para permitir a correta interpretação das idades obtidas, faz-se necessária a calibração dos resultados com base em um robusto banco de dados produzido pela comunidade científica na área de radiocarbono. A calibração objetiva, principalmente, considerar as variações na produção e distribuição do 14 C ao longo do tempo e, no caso do ambiente marinho, corrigir ainda que parcialmente o Efeito de Reservatório Marinho (Marine Reservoir Effect -MRE). De fato, dado que a magnitude do fenômeno aumenta com a profundidade e varia espacialmente em função da dinâmica oceânica, a simples calibração com uma curva marinha global é incapaz de lidar com a real variabilidade do efeito, rendendo resultados não acurados. Desse modo, considera-se também uma correção local, denominada ∆R, com valores disponíveis na literatura para diversas regiões do globo. Assim, no procedimento que é atualmente o padrão adotado em estudos cronológicos, a correção local para o MRE antecede a calibração de uma idade de 14 C marinha com a curva global. Aqui objetivamos elencar os valores de ∆R disponíveis para a costa brasileira, mostrando o impacto causado na calibração das idades de radiocarbono e a importância desse tipo de correção para estudos cronológicos baseados na datação de 14 C de material marinho. Discutimos, finalmente, os problemas causados pela falta ou pelo uso equivocado dessa correção. Palavras-chave: radiocarbono; calibração; amostras marinhas; datação AbstractFor chronological studies encompassing periods within the last 50 thousand years, carbon 14 dating is the most used approach. Calibration with a robust data set allows the correct interpretation of obtained ages by considering temporal variations in radiocarbon production and distribution. In the case of marine radiocarbon ages, calibration is also meant to correct for the so-called Marine Reservoir Effect (MRE). Since the magnitude of this phenomenon increases with depth and varies spatially due to ocean dynamics, simple calibration with a global marine curve is incapable of dealing with the real variability of the effect, yielding inaccurate results. Therefore, one must also consider local corrections, termed ∆R, available in the literature for different regions of the globe. Currently, applying local corrections to marine radiocarbon ages prior to calibration with the most recent global marine curve is a standard practice in chronological studies. Here we aim to list available ∆R values for the coast of Brazil, showing their impact on the calibration of radiocarbon ages and the importance of such correction for chronological studies based on the 14 C dating of marine material. Problems arising from the misuse of ∆R values and/or lack of MRE corrections are also discussed.

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“…It is used in Brazil mainly for food packaging, and also can be widely found as fibers and photographic films . The industrial production of PET can occur by two routes: (a) direct esterification of terephthalic acid with ethylene glycol or (b) pre‐polymerization reaction to obtain bis (2‐hydroxyethylene) terephthalate (BHET) oligomer, followed by polycondensation at 280 °C …”

Section: Introductionmentioning

confidence: 99%

PET Recycling by Alcoholysis Using a New Heterogeneous Catalyst: Study and its Use in Polyurethane Adhesives Preparation

Scremin

Miyazaki

Lunelli

et al. 2019

Macromolecular Symposia

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One of the most used plastics in the world is poly(ethylene terephthalate), PET, which is on the top of the list of recyclable polymers. In this work, it was studied the chemical recycling of PET by the alcoholysis reaction using diethylene glycol (DEG) and sodium metasilicate (NaMs) as catalyst. This catalyst was not used before for this kind of reaction and showed an activity as good as the most used compound (zinc acetate). The PET‐polyol was produced with the reaction conditions that showed the higher weight yield and the final product was used in polyurethane (PU) adhesives compositions. The PUs were obtained using PET‐polyol, tolylene diisocyanate (10, 20 or 30% NCOfree) and DEG as chain extender or glycerin (GLY) as crosslinker. The adhesives were poured into Pinus taeda wood and the speciments were taken into mechanical properties evaluation accordingly to ASTM D 2339‐98. The results indicated that the PU adhesives 10% NCOfree with DEG were able to support the highest shear stress force applied (7.5 Mpa).

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Biogenic fraction in the synthesis of polyethylene terephthalate

Cited by 15 publications

References 14 publications

Bio-Polyethylene (Bio-PE), Bio-Polypropylene (Bio-PP) and Bio-Poly(ethylene terephthalate) (Bio-PET): Recent Developments in Bio-Based Polymers Analogous to Petroleum-Derived Ones for Packaging and Engineering Applications

Bio-Polyethylene (Bio-PE), Bio-Polypropylene (Bio-PP) and Bio-Poly(ethylene terephthalate) (Bio-PET): Recent Developments in Bio-Based Polymers Analogous to Petroleum-Derived Ones for Packaging and Engineering Applications

Efeito de reservatório marinho na costa do Brasil

PET Recycling by Alcoholysis Using a New Heterogeneous Catalyst: Study and its Use in Polyurethane Adhesives Preparation

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