Investigation of monomer ratios in random and block copolymers of ethylene and propylene using pyrolysis–gas chromatography/mass spectrometry

Wampler, Thomas P.; Zawodny, Charles; Mancini, Leticia; Wampler, Justin

doi:10.1016/s0165-2370(03)00083-4

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…The selected reports on polymer structure characterization by Py-GC are summarized in Table 1. Identification and quantification of monomer composition is a major trend in Py-GC studies (Entries 4, 6, 11, 12, 15, 17, 18) [23][24][25][26][27][28][29] . Wampler et al 25 (Entry 11) pyrolyzed block (7-25 wt% ethylene) and random (40.1-78.6 wt% ethylene)…”

Section: Characterization Of Polymer Structurementioning

confidence: 99%

Latest Trends in Pyrolysis Gas Chromatography for Analytical and Applied Pyrolysis of Plastics

Kumagai

2020

ANAL. SCI.

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Pyrolysis is considered a promising method for polymer characterization (in the field of analytical pyrolysis) and for chemical feedstock recovery from plastic wastes (in the field of applied pyrolysis) because it can decompose any polymeric material into smaller molecules by applying heat alone in an inert atmosphere. Pyrolysis-gas chromatography (Py-GC) involves pyrolyzing polymeric materials in a micropyrolyzer and the subsequent direct GC analysis of pyrolyzates. Py-GC has immense potential for application in the fields of both analytical and applied pyrolysis, allowing rapid and accurate analysis of pyrolyzates. This is beneficial for elucidating microstructure and composition of polymers and for rapid screening of pyrolysis conditions for designing feedstock recycling processes. In this review, we examined latest research trends in Py-GC for application in polymer characterization, analysis of plastics in environment, and chemical feedstock recovery from plastics.

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Section: Characterization Of Polymer Structurementioning

confidence: 99%

Latest Trends in Pyrolysis Gas Chromatography for Analytical and Applied Pyrolysis of Plastics

Kumagai

2020

ANAL. SCI.

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“…Analytical pyrolysis in combination with gas chromatography/mass spectrometry (Py-GC/MS) is an established tool for the qualitative and quantitative analysis of non-soluble synthetic polymers and bio-polymers (Lattimer 1993;Wampler et al 2003;Sojak et al 2007;Wang et al 2007a). Here, the pyrolytic degradation of polymers can be observed based on the so-called pyrograms (chromatogram of the numerous degradation products).…”

Section: Introductionmentioning

confidence: 99%

“…The decomposition of low-density PE and PP was studied in a batch reactor at 4508C (Sojak et al 2007). PE gives rise to mainly straight-chain hydrocarbons, including alkanes, alkenes and dienes, whereas PP can also produce methyl-branched hydrocarbon oligomers (Wampler et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Quantification of polypropylene (PP) in wood plastic composites (WPCs) by analytical pyrolysis (Py) and differential scanning calorimetry (DSC)

Windt¹,

Meier²,

Lehnen³

2011

Holzforschung

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The common use of wood together with traditional chemical polymers opens new possibilities in the field of sustainable product development. Wood plastic composites (WPCs) are an ideal combination of these raw materials, which can be produced with standard plastic technology such as extrusion or injection moulding. Wood to plastic ratio in a WPC influences quality and price, thus adaptation of analytical tools for material testing and quality assurance is required. In this study, the suitability of analytical pyrolysis (Py) and differential scanning calorimetry (DSC) was investigated to quantify the amount of polypropylene (PP) in WPCs. The reliability of these methods was tested by analysing WPCs with different ratios of wood and PP. The amount of PP can be determined with DSC based on its melting point as the influence of wood is negligible in this context. The increment of typical PP markers and decrement of wood markers was observed and quantified in the pyrograms if the PP content in WPCs was elevated. Thus, the ratio of PP and wood can be reliably quantified by means of online and offline analytical pyrolysis.

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“…[8][9][10][11][12][13] Recent developments have focused on the enhanced detection of low level chemical species in polymers. The detection of low content additives, including fillers, pigments, antioxidants, stabilizers, flame retardants, plasticizers, lubricants and other modifiers in the polymer, was simplified by using a combination of multiple temperature step and selected ion chromatography.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Minor Additives and Polymer in Used-stripper Using Pyrolysis-Gas Chromatography/Mass Spectrometry and Electrospray Mass Spectrometry

Koo¹,

Park

Han³

et al. 2009

Bulletin of the Korean Chemical Society

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The trace polymer and additives in used stripper solutions were analyzed by a combination of Py-GC/MS and ESI-MS. In the comparison of the pyrolysates produced by the pyrolysis of the pure stripper and photoresist at 500 o C, the presence of novolac polymer in the used stripper was confirmed by the presence of the characteristic peaks of its pyrolysates, such as those of the methylphenol, di-methylphenol and methylenebis(methylphenol) isomers. The intact trace polymer was measured by ESI-MS, which showed the distribution of oligomers at intervals of 120 Da, indicating di-methylphenol to be the repeat unit. Additional MS/MS measurements demonstrated that the end group is methylphenol and the repeat groups are di-methylphenol. Some modified oligomers caused by the methylation or di-methylation of the repeat unit were also identified. Although the polymer is only present at a trace level in the used stripper, these combined analytical methods provided the means to qualify the stripper solution through the identification and structural determination of the polymer.

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Investigation of monomer ratios in random and block copolymers of ethylene and propylene using pyrolysis–gas chromatography/mass spectrometry

Cited by 10 publications

References 8 publications

Latest Trends in Pyrolysis Gas Chromatography for Analytical and Applied Pyrolysis of Plastics

Latest Trends in Pyrolysis Gas Chromatography for Analytical and Applied Pyrolysis of Plastics

Quantification of polypropylene (PP) in wood plastic composites (WPCs) by analytical pyrolysis (Py) and differential scanning calorimetry (DSC)

Analysis of Minor Additives and Polymer in Used-stripper Using Pyrolysis-Gas Chromatography/Mass Spectrometry and Electrospray Mass Spectrometry

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