Badia, J.; Strömberg, EM.; Ribes Greus, MD.; Karlsson, S. (2011). Assessing the MALDI-TOF MS sample preparation procedure to analyze the influence of thermo-oxidative ageing and thermo-mechanical degradation on poly (Lactide). EUROPEAN POLYMER JOURNAL. 47(7):1416-1428. https://doi.org/10.1016/j.eurpolymj.2011.05.001
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/31954
Title:
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Assessing the MALDI-TOF MS sample preparation procedure to analyze the influence of thermo-oxidative ageing and thermo-mechanical degradation on poly (Lactide)
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Author:
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Badia, J.D.
Strömberg, Emma Marie
Ribes Greus, María Desamparados
Karlsson, Sigbritt
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UPV Unit:
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Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics
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Issued date:
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Abstract:
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[EN] Multiple processing by means of successive injection cycles was used to simulate the thermo-mechanical degradation effects on the oligomeric distribution of PLA under mechanical recycling. Likewise, an accelerated ...[+]
[EN] Multiple processing by means of successive injection cycles was used to simulate the thermo-mechanical degradation effects on the oligomeric distribution of PLA under mechanical recycling. Likewise, an accelerated thermal ageing over PLA glass transition was performed in order to simulate its service life. MALDI-TOF MS was used for the analysis and the sample preparation procedure was assessed by means of a statistical Design of Experiments (DoE). The quality effects in use for the analysis were signal-to-noise ratio and Resolution. Different matrixes, analyte/matrix proportions and the use of NaTFA as cationization agent were considered. A deep inspection of the statistical results provided a better understanding of the influence of the different factors, individually or in combination, to the signal. The application of DoE for the improvement of the MALDI measurement of PLA stated that the best combination of factors (levels) was the following: matrix (s-DHB), proportion analyte/matrix (1/5 V/V), and no use of cationization agent. Degradation primarily affected the initially predominant cyclic [LA C] n and linear H[LA L] nOH species, where LA stands for a PLA repeating unit. Intramolecular and intermolecular transesterifications as well as hydrolytic and homolytic reactions took place during the formation and disappearance of oligomeric species. In both degradation mechanisms induced by thermal ageing and thermo-mechanical degradation, the formation of H[LA L] nOCH 3 by intermolecular transesterifications was highlighted. © 2011 Elsevier Ltd. All rights reserved.
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Subjects:
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Design of Experiments (DoE)
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Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS)
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Polylactide (PLA)
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Thermo-mechanical degradation
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Thermo-oxidative ageing
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Analytes
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Cationization
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Deep inspection
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Degradation mechanism
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Injection cycles
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MALDI TOF MS
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Matrix
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Matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry
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Mechanical recycling
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Multiple processing
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Poly(lactide)
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Polylactides
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Repeating unit
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Sample preparation procedure
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Signal to noise
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Statistical design of experiments
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Transesterifications
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Design of experiments
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Desorption
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Experiments
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Glass lasers
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Glass transition
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Mass spectrometry
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Mechanisms
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Oligomers
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Signal to noise ratio
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Degradation
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Copyrigths:
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Cerrado |
Source:
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EUROPEAN POLYMER JOURNAL. (issn:
0014-3057
)
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DOI:
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10.1016/j.eurpolymj.2011.05.001
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.eurpolymj.2011.05.001
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Project ID:
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info:eu-repo/grantAgreement/MICINN//UPOV08-3E-013/ES/ADQUISICIÓN DE EQUIPO PARA MEDIDAS DIELÉCTRICAS Y DE POLARIZACIÓN PARA NUEVOS MATERIALES APLICADOS A TECNOLOGÍAS ENERGÉTICAS/
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Thanks:
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The authors would like to acknowledge the Spanish Ministry of Science and Innovation for the financial support through the Research Project UPOVCE-3E-013. The Spanish Ministry for Education is acknowledged for the concession ...[+]
The authors would like to acknowledge the Spanish Ministry of Science and Innovation for the financial support through the Research Project UPOVCE-3E-013. The Spanish Ministry for Education is acknowledged for the concession of a predoctoral research position to J.D. Badia by means of the FPU program. AIMPLAS is acknowledged for providing and processing the material, respectively. Royal Institute of Technology (KTH, Sweden) and Universitat Politecnica de Valencia (UPV, Spain) are also thanked for additional economical support.
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Type:
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Artículo
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