Degradative polymer analysis by chromatography

Haken, J.K.; Iddamalgoda, P.I.

doi:10.1016/s0021-9673(96)00655-3

Cited by 19 publications

(4 citation statements)

References 69 publications

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“…Além disso, o processo de pirólise é considerado uma ferramenta extremamente poderosa particularmente em associação com a cromatografia gasosa e/ou espectrometria de massas para análise qualitativa e estudos mecanicistas. 29 Atualmente, vários países desenvolvidos vêm empregando o processo pirolítico, tendo como principal objetivo a obtenção de produto líquido de A partir da pirólise catalítica dos resíduos plásticos municipais utilizando como catalisador a zeólita HZSM-5 comercial, obteve-se como produto um óleo pirolítico.…”

Section: Reciclagem Terciária: Piróliseunclassified

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Tertiary Recycling of Poly(ethylene terephthalate) Aimed at Obtaining Chemicals and Fuels: A Review

Figueiredo¹,

Alves²,

Fernandes³

et al. 2015

Revista Virtual De Química

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Plastics have been an indispensable material in the life of humanity. However, these polymers have a slow degradation process that can lead to contamination of soil, air and water when they are not properly allocated. Since the poly (ethylene terephthalate)-PET is one of the most commonly consumed thermoplastic resins in Brazil and with a short time of use, it is normal to find it being discarded in landfills, streets, lakes and garbage dumps. Consequently, the recycling of plastic waste is an alternative for avoiding environmental and social problems. In this paper we describe the recycling methods for reuse of plastic waste, mainly the tertiary recycling of PET using the pyrolysis process. Tertiary recycling-pyrolysisof PET is important because it reduces costs of pre-treatment, collection and selection, and allows the obtaining of both a combustible substance and chemicals used for the obtaining of the polymer which gave it origin or even a new polymer, thus eliminating the risk of using recycled PET for packaging foods, beverages and pharmaceuticals.

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Section: Reciclagem Terciária: Piróliseunclassified

“…Segundo Haken e Iddamalgoda (1996) 29 o processo de pirólise é aplicável a ambos os polímeros de adição e de condensação e fornece informações sobre a composição química e estrutura dos polímeros.…”

Section: Pirólise Do Petunclassified

Tertiary Recycling of Poly(ethylene terephthalate) Aimed at Obtaining Chemicals and Fuels: A Review

Figueiredo¹,

Alves²,

Fernandes³

et al. 2015

Revista Virtual De Química

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“…Aromatic PI types are also amenable to various types of chemical degradation as the heterocyclic imide and aryl group can be cleaved chemically (Fig. ) .…”

Section: Introductionmentioning

confidence: 99%

Identification of polyimide materials using quantitative CE with UV and QTOF‐MS detection

et al. 2013

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Polyimides (PIs) are a group of widely used synthetic materials that service a variety of different purposes including microelectronics, insulating films and aerospace applications. Depending on the requirements (defined by the particular final product), the actual composition of PIs may show substantial chemical variation. To study this variation in chemical structure, CE-MS can be employed for the determination of PI composition following chemical degradation of the polymer sample. PI is chemically decomposed to corresponding aromatic diamine and carboxylic acid components using an alkali fusion reaction. Solid polymer samples are fused in a potassium hydroxide melt yielding reaction products that are diluted in acid and can be immediately analysed by CE coupled to a Q/TOF-MS with quantification performed using conventional UV detection. This approach involves a simple and rapid sample preparation yielding both qualitative and quantitative information regarding the chemical composition of the polymer. Application of the CE-MS approach is shown for a range of commercially available PI and poly(amide-imide) materials and the results are used to infer the respective chemical compositions.

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“…Pyrolysis gas chromatography-mass spectrometry (PY-GC-MS) is one of the most widely used analytical tools to characterize recalcitrant macromolecules at the molecular level [12,13]. This technique which fits space constraints was already implemented in the probes of Viking and Cassini Huygens missions and is currently under development for the Mars Organic Molecule Analyzer (MOMA) instrument of the nextcoming European Exomars 2013 mission.…”

Section: Introductionmentioning

confidence: 99%