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SN/T 4183-2015: Determination of relative molecular weight and molecular weight distribution of polyolefins. High temperature gel permeation chromatography method
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Determination of relative molecular weight and molecular weight distribution of polyolefins. High temperature gel permeation chromatography method
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SN/T 4183-2015
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Basic data | Standard ID | SN/T 4183-2015 (SN/T4183-2015) | | Description (Translated English) | Determination of relative molecular weight and molecular weight distribution of polyolefins. High temperature gel permeation chromatography method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G32 | | Classification of International Standard | 83.080 | | Word Count Estimation | 8,869 | | Date of Issue | 2015-05-26 | | Date of Implementation | 2016-01-01 | | Quoted Standard | GB/T 21864-2008 | | Adopted Standard | ASTM D 6474-1999(2006), NEQ | | Regulation (derived from) | State Quality-Inspection-accreditation [2015] No.224 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the method of gel permeation chromatography molecular weight polyethylene and polypropylene and molecular weight distribution. This standard applies to polyethylene and polypropylene molecular weight and molecular weight distribution determination. This standard does not apply to the determination of high pressure low density polyethylene molecular weight and molecular weight distribution is used. | SN/T 4183-2015: Determination of relative molecular weight and molecular weight distribution of polyolefins. High temperature gel permeation chromatography method
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Determination of relative molecular weight and molecular weight distribution of polyolefins. High temperature gel permeation chromatography method
People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard
Determination of relative molecular weight and molecular weight distribution of polyolefin
High temperature gel permeation chromatography
Released on.2015-05-26
2016-01-01 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses ASTM D6474-1999 (2006) "polyolefin molecular weight distribution and average molecular weight test method high temperature gel penetration
The technical route of chromatography.
This standard has the following modifications compared to ASTM D6474-1999 (2006).
--- Chapters 1 and 2 of this standard correspond to Chapters 1 and 2 of ASTM D6474-1999 (2006).
--- Remove Chapter 3, Chapter 5, Chapter 9, Chapter 10, Chapter 17, Chapter 18 and Chapter 3 of ASTM D6474-1999 (2006)
Chapter 19.
--- Chapter 3 of this standard corresponds to Chapter 4 of ASTM D6474-1999 (2006).
--- Chapter 4 of this standard adds 4.5, 4.1, 4.2, 4.6, and 4.7 respectively corresponding to 8.1, 8.2 of ASTMD6474-1999 (2006),
12.2, 12.1, 4.3 and 4.4 correspond to 8.3 of ASTM D6474-1999 (2006).
--- Chapter 5 of this standard adds 5.2, 5.1.1 corresponds to Chapter 7 of ASTM D6474-1999 (2006).
--- This standard 5.1.2 corresponds to Chapter 13 of ASTM D6474-1999 (2006).
--- This standard adds 5.1.3 gel permeation chromatograph working conditions.
--- Chapter 6 of this standard corresponds to Chapter 14 of ASTM D6474-1999 (2006).
--- This standard 7.1 corresponds to 15.2 and 12.3 of ASTM D6474-1999 (2006).
--- This standard increases by 7.2.
--- This standard 7.3, 7.4 corresponds to 15.3, 15.6 of ASTM D6474-1999 (2006).
--- Chapter 8 of this standard corresponds to Chapter 16 of ASTM D6474-1999 (2006).
--- This standard adds Chapter 9.
This standard is proposed and managed by the National Certification and Accreditation Administration.
This standard was drafted. Shanghai Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Wu Xiaohong, Yan Wenbin, Zhou Yun, Chen Xiang, Zhu Hongkun, Tao Haihua.
Determination of relative molecular weight and molecular weight distribution of polyolefin
High temperature gel permeation chromatography
1 Scope
This standard specifies the gel permeation chromatography method for determining the relative molecular weight and molecular weight distribution of polyethylene and polypropylene.
This standard applies to the determination of the relative molecular weight and molecular weight distribution of polyethylene and polypropylene.
This standard does not apply to the determination of the relative molecular weight and molecular weight distribution of high pressure low density polyethylene.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 21864-2008 Standard method for the determination of average molecular weight and molecular weight distribution of polystyrene - High-performance size exclusion chromatography
Method (ASTMD5296.2005, StandardtestmethodformolecularweightaveragesandmolecularWeight
Distributionofpolystyrene-Highperformancesize-exclusionchromatography,IDT)
3 Method summary
The polyolefin sample dissolved in the solvent is injected into a column packed with a solid substrate and separated according to the size of the polymer molecules in the solution. when
When the molecules are eluted from the column, the molecular weight of the separation is detected and recorded according to its concentration. By correcting the curve, the retention time can be converted to
Molecular weight. The average molecular weight and molecular weight distribution are calculated from molecular weight concentration data.
4 reagents and materials
The reagents used were of analytical grade unless otherwise stated.
4.1 1,2,4-trichlorobenzene.
4.2 Polystyrene standards. Polystyrene standards of narrow molecular weight distribution (Mw/Mn < 1.1) of known molecular weight.
4.3 Toluene.
4.4 n-hexadecane.
4.5 2,6-di-tert-butyl-4-methylphenol solution (250mg/L). weigh the appropriate amount of 2,6-di-tert-butyl-4-methylphenol to 1,2,4-three
The chlorobenzene or sample solution was made into a 250 mg/L 2,6-di-tert-butyl-4-methylphenol solution.
4.6 Polymer Standard Solution. Prepare 3~5 mixed standard solutions, containing 3-4 standard samples with baseline separation, at least 12 narrow sizes
Distribution of polystyrene standards and polyolefin standards (if any), each component has a mass concentration of 0.01% to 0.03%. Standard in the room
Dissolve at room temperature (up to 3d) or at about 150 °C for 3h~6h. The polymer standard solution can be used for 1 month. stable
The polystyrene solution can be stored for several months at room temperature.
4.7 Sample solution. A sample of the weighed polyolefin is added to an autosampler tube with a solvent-inert material with a lid or a larger volume of heat-resistant tube.
The polyolefin concentration is between 0.05% and 0.2%. Add 2,6-di-tert-butyl-4-methylphenol solution (concentration is about 250mg/L),
Cover the lid and heat at about 150 °C for 3h~6h to completely dissolve the sample. Complete dissolution of polypropylene and high molecular weight polyethylene samples may require
Heat to 160 ° C ~ 180 ° C.
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