Characterization of Polyamides 6, 11, and 12. Determination of Molecular Weight by Size Exclusion Chromatography (IUPAC Technical Report)
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Characterization of Polyamides 6, 11, and 12. Determination of Molecular Weight by Size Exclusion Chromatography (IUPAC Technical Report)
(IUPAC Technical Report)
E.C. Robert, et al.
Pure and Applied Chemistry
Vol. 76, No. 11, pp. 2009–2025 (2004)
This report presents the results from IUPAC Working Party IV.2.2 of the global trial within the framework of IUPAC Commission IV.2, “Characterization of Commercial Polymers.” The results were compared on the basis of molecular weight obtained by size exclusion chromatography (SEC) using different techniques practiced in participating laboratories, the majority of which were materials suppliers. The practical methodologies used different solvents for the polymers, in particular, benzyl alcohol, 1,1,1,3,3,3 hexafluoropropan-2-ol and tetrahydrofuran; the latter solvent was used after chemical modification of the polyamides, in general with trifluoroacetic anhydride. Eight laboratories participated in the trial. The repeatability for molecular weight in each laboratory was good, whatever technique was used, the relative standard deviation averaged over all laboratories was around 3%. The deviations in distribution of molecular weights with different experimental methodologies were broader, but were reasonably good despite the diversity of methods. The differences in the distribution correspond to a confidence interval of about 30% in molecular weight.
www.iupac.org/publications/pac/2004/7611/7611x2009.html
Page last modified 11 February 2005.
Copyright © 2003-2005 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
| Making an imPACt | | | Recent IUPAC technical reports and recommendations that affect the many fields of pure and applied chemistry. See also www.iupac.org/publications/pac |
Characterization of Polyamides 6, 11, and 12. Determination of Molecular Weight by Size Exclusion Chromatography (IUPAC Technical Report)
New Online Submission and Peer Review System for PAC
During 2004, an online submission and peer-review system was implemented for Pure and Applied Chemistry. The new Web-based workflow for manuscript handling will enable Scientific Editor James R. Bull to implement peer review of manuscripts from IUPAC-sponsored conferences, which was formerly a discretionary option of the conference organizers. The system also provides support to John W. Lorimer and Bernado J. Herold, editors of IUPAC Recommendations and Technical Reports and respectively chairman and secretary of the Interdivisional Committee on Terminology, Nomenclature and Symbols.
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Page last modified 11 February 2005.
Copyright © 2003-2005 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
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Artikel in diesem Heft
- Masthead
- From the Editor
- Contents
- Welcome to Beijing!
- The Evolution of an Ethic and a Commitment
- Linus Pauling
- Citation Highlights 1998–2003
- How Can IUPAC Facilitate International Collaborative Research?
- COCI Campaigns for the Company Associates Program
- Piet Steyn Wins One of South Africa’s Highest Science Awards
- First ICSU Regional Meeting for Africa
- Standardization of Analytical Approaches and Analytical Capacity-Building in Africa
- Young Ambassadors for Chemistry
- IUPAC Seeks Your Comments
- Definition of Terms Related to Polymer Blends, Composites, and Multiphase Polymeric Materials (IUPAC Recommendations 2004)
- Characterization of Polyamides 6, 11, and 12. Determination of Molecular Weight by Size Exclusion Chromatography (IUPAC Technical Report)
- Rheological Properties and Associated Structural Characteristics of Some Aromatic Polycondensates Including Liquid-Crystalline Polyesters and Cellulose Derivatives (IUPAC Technical Report)
- Name and Symbol of the Element with Atomic Number 111 (IUPAC Recommendations 2004)
- Chemical Actinometry (IUPAC Technical Report)
- Electrochemistry at the Interface between Two Immiscible Electrolyte Solutions (IUPAC Technical Report)
- Special Topic Articles Featuring the 2004 Winners of the IUPAC Prize for Young Chemists
- Natural Products and Biodiversity
- A New Unifying Biparametric Nomenclature that Spans All of Chemistry
- Chemistry and You
- Organic Synthesis
- Vanadium Chemistry
- Chemical Thermodynamics
- Phosphorus Chemistry
- Heterocyclic Chemistry
- Soil Science
- Chemical Engineering
- Thermodynamics
- Polymer Blends and Eurofillers
- Polymer Systems
- Organic Solids
- Heterocyclic Chemistry
- Plasma Chemistry
- Novel Aromatic Compounds
- Analytical Chemistry
- Mark Your Calendar
Artikel in diesem Heft
- Masthead
- From the Editor
- Contents
- Welcome to Beijing!
- The Evolution of an Ethic and a Commitment
- Linus Pauling
- Citation Highlights 1998–2003
- How Can IUPAC Facilitate International Collaborative Research?
- COCI Campaigns for the Company Associates Program
- Piet Steyn Wins One of South Africa’s Highest Science Awards
- First ICSU Regional Meeting for Africa
- Standardization of Analytical Approaches and Analytical Capacity-Building in Africa
- Young Ambassadors for Chemistry
- IUPAC Seeks Your Comments
- Definition of Terms Related to Polymer Blends, Composites, and Multiphase Polymeric Materials (IUPAC Recommendations 2004)
- Characterization of Polyamides 6, 11, and 12. Determination of Molecular Weight by Size Exclusion Chromatography (IUPAC Technical Report)
- Rheological Properties and Associated Structural Characteristics of Some Aromatic Polycondensates Including Liquid-Crystalline Polyesters and Cellulose Derivatives (IUPAC Technical Report)
- Name and Symbol of the Element with Atomic Number 111 (IUPAC Recommendations 2004)
- Chemical Actinometry (IUPAC Technical Report)
- Electrochemistry at the Interface between Two Immiscible Electrolyte Solutions (IUPAC Technical Report)
- Special Topic Articles Featuring the 2004 Winners of the IUPAC Prize for Young Chemists
- Natural Products and Biodiversity
- A New Unifying Biparametric Nomenclature that Spans All of Chemistry
- Chemistry and You
- Organic Synthesis
- Vanadium Chemistry
- Chemical Thermodynamics
- Phosphorus Chemistry
- Heterocyclic Chemistry
- Soil Science
- Chemical Engineering
- Thermodynamics
- Polymer Blends and Eurofillers
- Polymer Systems
- Organic Solids
- Heterocyclic Chemistry
- Plasma Chemistry
- Novel Aromatic Compounds
- Analytical Chemistry
- Mark Your Calendar
