Round Robin Test on the Molecular Characterization of Epoxy Resins by Liquid Chromatography
Round Robin Test on the Molecular Characterization of Epoxy Resins by Liquid Chromatography
Stepan Podzimek
International Journal of Polymer Analysis and Characterization
Vol. 9, No. 5-6, pp. 305-316 (2004)
DOI: 10.1080/10236660490935718
The great importance of epoxy resins originates from the wide range of applications in many industrial areas. However, only relatively primitive analytical tests are commonly used for routine characterization of epoxy resins. The simple characteristics are often unable to discriminate among different samples, to find structure versus properties relations, and to evaluate production reproducibility. Molar mass distribution of epoxy resins affects their application properties and can be also used as a sensitive measure of the reproducibility of the production.
The main objectives of this project were (i) to study the influence of experimental conditions, in particular the type and number of columns and column calibration, on the molar mass averages obtained by size exclusion chromatography (SEC), and (ii) to figure out attainable reproducibility of SEC results generated in different laboratories, and (iii) to compare SEC molar mass averages with those determined by the absolute methods. Since epoxy resins are typical examples of oligomers, most of the conclusions may be generally applicable to the analysis of other oligomers.
Two commercially available epoxy resins based on bisphenol A (2,2-bis(4-hydroxyphenyl)propane) of different molar mass distribution were selected for the Round Robin Test. The samples were characterized by vapor pressure osmometry (VPO), method of end groups (EG), multi-angle light scattering (MALS) in batch mode, and matrix assisted laser desorption ionization mass spectroscopy (MALDI-MS) to allow comparison of chromatographic results with the data from the absolute methods of molar mass determination.
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- Mark Your Calendar
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Articles in the same Issue
- Masthead
- From the Editor
- Contents
- Reflections at the End of a Presidency
- A Wrap-Up of the General Assembly
- Division Roundups
- Thanks to its Enduring Corrosion Resistance, an Indian Historical Artifact’s Appearance Belies its Age
- Where is there Wisdom to be Found in Ancient Materials Chemistry?
- IUPAC–Samsung Education Prize for 2005
- IUPAC-Richter Prize in Medicinal Chemistry
- Standard Atomic Weights Revised
- New CAs Join IUPAC
- IUPAC Poster Prizes Awarded in Denmark
- Fullerene Nomenclature–An Addendum to IUPAC History
- Emerging Issues in Developing Countries
- JCAMP-DX for Electron Magnetic Resonance
- XML-Based IUPAC Standard for Experimental, Predicted, and Critically Evaluated Thermodynamic Property Data Storage and Capture (ThermoML)
- Critical Evaluation of Stability Constants of Metal Complexes of Complexones for Biomedical and Environmental Applications (IUPAC Technical Report)
- Round Robin Test on the Molecular Characterization of Epoxy Resins by Liquid Chromatography
- Organic Synthesis–PAC Special Topic Issue
- Nomenclature of Inorganic Chemistry – IUPAC Recommendations 2005
- Analogue-Based Drug Discovery
- Measurement of the Thermodynamic Properties of Multiple Phases
- Polymer Chemistry, Reactions and Processes
- The Periodic Table: Into the 21st Century
- Nanotechnology: Science and Application
- Heterocyclic Conference
- Electrical and Related Properties of Organic Solids and Polymers
- Physical Chemistry: Education and Challenges
- Neurotoxic Metals: Lead, Manganese, and Mercury– From Research to Prevention
- Polymers and Organic Chemistry
- Biodiversity and Natural Products
- Green Chemistry
- Aromatic Compounds
- Organometallic Chemistry
- Biotechnology: Milestones towards Sustainability of Human Society
- Mark Your Calendar
- Index for 2005
