GB/T 25254-2022 Poly-(tetra methylene ether glycol) (PTMEG) for industrial use
1 Scope
This document specifies the classification and designation, technical requirements, test methods, inspection rules, marking and accompanying documents, packaging, transport, and storage of poly-tetra methylene ether glycol (PTMEG) for industrial use.
This document is applicable to PTMEG for industrial use produced by polymerization of tetrahydrofuran (THF) monomer.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 3143 Color determination method of liquid chemicals (Hazen unit - Platinum-cobalt scale)
GB/T 4472-2011 Determination of density and relative density for chemical products
GB/T 6283 Chemical products - Determination of water - Karl·Fischer method (general method)
GB/T 6678 General principles for sampling chemical products
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 10247-2008 Methods of viscosity measurement
GB/T 21186 Fourier transform infrared spectrometer
3 Terms and definitions
No terms and definitions are listed in this document.
4 Classification and designation
The grade of PTMEG shall be expressed by “PTMEG” and the average molar mass. For PTMEG with an average molar mass less than 1,000 g/mol, each ±25 g/mol constitutes one grade; for PTMEG with an average molar greater than 1,000 g/mol, each ±50 g/mol constitutes one grade. For example, PTMEG650 indicates an average molar mass of 650 g/mol ± 25 g/mol; PTMEG1800 indicates an average molar mass of 1,800 g/mol ± 50 g/mol.
5 Technical requirements
5.1 Appearance
Solid: white, waxy;
Liquid: colorless and transparent, free from visible impurities.
5.2 Technical specifications
The technical specifications shall comply with the requirements of Table 1.
Table 1 Technical specifications
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking and accompanying documents
9 Packaging, transport and storage
Annex A (Normative) Determination of average molar mass and hydroxyl number
Annex B (Normative) Determination of carbonyl ratio
Standard
GB/T 25254-2022 Poly-(tetra methylene ether glycol)(PTMEG) for industrial use (English Version)
Standard No.
GB/T 25254-2022
Status
valid
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
225.0
Implemented on
2022-11-1
Delivery
via email in 1 business day
Detail of GB/T 25254-2022
Standard No.
GB/T 25254-2022
English Name
Poly-(tetra methylene ether glycol)(PTMEG) for industrial use
GB/T 25254-2022 Poly-(tetra methylene ether glycol) (PTMEG) for industrial use
1 Scope
This document specifies the classification and designation, technical requirements, test methods, inspection rules, marking and accompanying documents, packaging, transport, and storage of poly-tetra methylene ether glycol (PTMEG) for industrial use.
This document is applicable to PTMEG for industrial use produced by polymerization of tetrahydrofuran (THF) monomer.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 3143 Color determination method of liquid chemicals (Hazen unit - Platinum-cobalt scale)
GB/T 4472-2011 Determination of density and relative density for chemical products
GB/T 6283 Chemical products - Determination of water - Karl·Fischer method (general method)
GB/T 6678 General principles for sampling chemical products
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 10247-2008 Methods of viscosity measurement
GB/T 21186 Fourier transform infrared spectrometer
3 Terms and definitions
No terms and definitions are listed in this document.
4 Classification and designation
The grade of PTMEG shall be expressed by “PTMEG” and the average molar mass. For PTMEG with an average molar mass less than 1,000 g/mol, each ±25 g/mol constitutes one grade; for PTMEG with an average molar greater than 1,000 g/mol, each ±50 g/mol constitutes one grade. For example, PTMEG650 indicates an average molar mass of 650 g/mol ± 25 g/mol; PTMEG1800 indicates an average molar mass of 1,800 g/mol ± 50 g/mol.
5 Technical requirements
5.1 Appearance
Solid: white, waxy;
Liquid: colorless and transparent, free from visible impurities.
5.2 Technical specifications
The technical specifications shall comply with the requirements of Table 1.
Table 1 Technical specifications
Contents of GB/T 25254-2022
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking and accompanying documents
9 Packaging, transport and storage
Annex A (Normative) Determination of average molar mass and hydroxyl number
Annex B (Normative) Determination of carbonyl ratio
