Plastics - Determination of phenolic resin compositions - Liquid chromatography
1 Scope
This standard specifies chromatographic methods for the separation of phenolic resins into their component compounds. Separation takes place according to molecular weight and/or polarity.
There are three liquid chromatographic methods:
Method A——Gel-permeation chromatography;
Method B——High-performance liquid chromatography on polar columns;
Method C——High-performance liquid chromatography on non-polar columns.
It is possible to separate a phenolic resin into its components according to molecular size using Method A (gel-permeation chromatography). Whereas free phenol and the sum of the dihydroxydiphenylmethanes (in novolaks) and various methylolphenols (in resols) are quantitatively separated in this procedure, high-molecular-weight components of the resins are only incompletely separated due to the multitude of isomers.
Methods B and C (high-performance liquid chromatography) separate the compounds in the phenolic resin according to molecular weight and polarity. Molecular-weight effects predominate on polar stationary phases (Method B), and the effect of polarity on non-polar stationary phases (Method C). These methods also allow quantitative determination of individual low-molecular-weight resin components. Because of the different resin solubilities, Method B is more suitable for novolaks and Method C for resols.
This standard is applicable to phenolic resins that are soluble in the solvents and solvent blends used.
This standard is useful for characterization of products and for research.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Test methods 5 Test report
Standard
GB/T 33388-2016 Plastics--Determination of phenolic resin compositions--Liquid chromatography (English Version)
Standard No.
GB/T 33388-2016
Status
valid
Language
English
File Format
PDF
Word Count
5500 words
Price(USD)
160.0
Implemented on
2017-7-1
Delivery
via email in 1 business day
Detail of GB/T 33388-2016
Standard No.
GB/T 33388-2016
English Name
Plastics--Determination of phenolic resin compositions--Liquid chromatography
Plastics - Determination of phenolic resin compositions - Liquid chromatography
1 Scope
This standard specifies chromatographic methods for the separation of phenolic resins into their component compounds. Separation takes place according to molecular weight and/or polarity.
There are three liquid chromatographic methods:
Method A——Gel-permeation chromatography;
Method B——High-performance liquid chromatography on polar columns;
Method C——High-performance liquid chromatography on non-polar columns.
It is possible to separate a phenolic resin into its components according to molecular size using Method A (gel-permeation chromatography). Whereas free phenol and the sum of the dihydroxydiphenylmethanes (in novolaks) and various methylolphenols (in resols) are quantitatively separated in this procedure, high-molecular-weight components of the resins are only incompletely separated due to the multitude of isomers.
Methods B and C (high-performance liquid chromatography) separate the compounds in the phenolic resin according to molecular weight and polarity. Molecular-weight effects predominate on polar stationary phases (Method B), and the effect of polarity on non-polar stationary phases (Method C). These methods also allow quantitative determination of individual low-molecular-weight resin components. Because of the different resin solubilities, Method B is more suitable for novolaks and Method C for resols.
This standard is applicable to phenolic resins that are soluble in the solvents and solvent blends used.
This standard is useful for characterization of products and for research.
Contents of GB/T 33388-2016
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
5 Test report
