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GB/T 24282-2021: Plastics - Determination of xylene-soluble matter fraction in polypropylene
Status: Valid GB/T 24282: Evolution and historical versions
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| GB/T 24282-2021 | English | 329 |
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Plastics - Determination of xylene-soluble matter fraction in polypropylene
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GB/T 24282-2021
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| GB/T 24282-2009 | English | 359 |
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Plastics -- Determination of xylene-soluble matter in polypropylene
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GB/T 24282-2009
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PDF similar to GB/T 24282-2021
Basic data | Standard ID | GB/T 24282-2021 (GB/T24282-2021) | | Description (Translated English) | Plastics - Determination of xylene-soluble matter fraction in polypropylene | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Word Count Estimation | 17,150 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24282-2021: Plastics - Determination of xylene-soluble matter fraction in polypropylene---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Plastics -- Determination of xylene-soluble matter fraction in polypropylene
ICS 83:080:01
CCSG31
National Standards of People's Republic of China
Replacing GB/T 24282-2009
Determination of Xylene Soluble Content in Plastic Polypropylene
(ISO 16152:2005, Plastics-Determinationofxylene-solublematterin
Published on 2021-12-31
2022-07-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Method A: Chemical Method 1
4:1 Principle 1
4:2 Equipment 1
4:3 Reagents and Materials 2
4:4 Test Step 2
4:5 Result calculation and representation 5
4:6 Precision5
5 Method B: Infrared Spectroscopy 5
5:1 Principle 5
5:2 Instruments 5
5:3 Reagents and Materials 6
5:4 Test Step 6
5:5 Result calculation and representation 7
5:6 Precision8
6 Method C: Low Resolution Pulsed NMR Method 8
6:1 Principle 8
6:2 Equipment 8
6:3 Test Step 8
6:4 Result representation 9
6:5 Precision9
7 Test report 9
Appendix A (informative) Comparison of this document with ISO 16152:2005 structure number 11
Appendix B (Informative) Precision Data Statistical Results 12
Reference 13
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents"
drafted:
This document replaces GB/T 24282-2009 "Determination of Xylene Soluble Content in Plastic Polypropylene", and GB/T 24282-
Compared with:2009, except for structural adjustment and editorial changes, the main technical changes are as follows:
a) Added "infrared spectroscopy" and "low-resolution pulsed nuclear magnetic resonance method" (see Chapter 1, Chapter 1 of the:2009 edition);
b) Removed the pipette with a specification of:200mL (see 4:6 of the:2009 edition);
c) Added specifications for funnels, vacuum drying ovens, controllable heating pans, dryers and ovens (see 4:2:10, 4:2:11, 4:2:13,
4:2:15 and 4:2:17, 4:11, 4:12, 4:14, 4:16 and 4:18 of the:2009 edition);
d) Change the content of "Note" to the text "If a heating plate is used for heating, the set temperature should be about 30°C higher than the boiling point of xylene" (see
4:4:3:7, 6:3:7 of the:2009 edition);
e) Added the normative reference document GB/T 8170 (see 4:5:3, 7:3 of the:2009 edition);
f) increased the precision of method A (see Chapter 8 of 4:6,:2009 edition);
g) Added Method B "Infrared Spectroscopy" (see Chapter 5);
h) Method C "Low Resolution Pulsed Nuclear Magnetic Resonance Method" was added (see Chapter 6):
This document is revised and adopted ISO 16152:2005 "Determination of Xylene-Soluble Content in Plastic Polypropylene":
Compared with ISO 16152:2005, this document has many adjustments in structure: Appendix A lists this document and ISO 16152:2005:
The structure number comparison list of :
The technical differences between this document and ISO 16152:2005 and their reasons are as follows:
a) Deleted the content related to the test steps, and added the description of the main content of the document (see Chapter 1) to meet the requirements of GB/T 1:1
Require;
b) The principle of Method A (see 4:1) is added, and the contents of 1:2 and 1:3 of ISO 16152:2005 are improved to make the description of the principle
More complete to meet the requirements of GB/T 1:1;
c) Changed the volume of the flask from 400mL to 500mL (see 4:4:2) to conform to my country's national conditions;
d) The pipette with a specification of:200mL is deleted to meet the requirements of Chinese standards;
e) The brand and model of filter paper are deleted to meet the requirements of Chinese standards;
f) Added specifications for vacuum drying ovens, controllable heating pans, dryers and ovens (see 4:2:11, 4:2:13, 4:2:15 and
4:2:17), to facilitate the application of this document;
g) Changed the "Note" containing requirements or recommendations to the main text (see 4:4:3:1, 4:4:3:3, 4:4:3:7 and 4:4:3:11), in line with GB/T 1:1
requirements;
h) The unit of nitrogen flow rate was changed to "should be about 35mL/min" (see 4:4:3:6) to increase operability;
i) Added the normative reference document GB/T 8170 (see 4:5:3) to improve the operability of the method and eliminate ambiguity;
j) increased the precision of Method A (see 4:6) to improve the applicability of the standard;
k) Added Method B "Infrared Spectroscopy" (see Chapter 5) to better meet the testing needs;
l) Method C "low-resolution pulsed nuclear magnetic resonance method" (see Chapter 6) was added to better meet the testing needs;
m) The method, apparatus and test conditions used, any circumstances that may affect the results are added to the test report [see Section 7
Chapter a), c), g)] to make the report more comprehensive:
Compared with ISO 16152:2005, this document has the following editorial changes:
--- Changed the symbols of three magnitudes from Ss, Sc and Sm to ws, wc and wm (see 3:1 and 4:5:2);
--- Delete the note (see the note to 5:3 of ISO 16152:2005);
--- Added Appendix A (informative) "Comparison of this document with the structure number of ISO 16152:2005";
--- Added Appendix B (informative) "Statistical Results of Precision Data":
Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Petroleum and Chemical Industry Federation:
This document is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC15):
This document is drafted by: Beijing Yanshan Petrochemical High Technology Co:, Ltd:, National Energy Group Ningxia Coal Industry Co:, Ltd:,
Beijing Yiluda Electromechanical Equipment Co:, Ltd:, Shaanxi Yanchang China Coal Yulin Energy Chemical Co:, Ltd:, China Petrochemical Corporation Beijing
Chemical Research Institute, Petrochemical Research Institute of China National Petroleum Corporation, Donghua Energy (Ningbo) New Materials Co:, Ltd:, Zhejiang Stone
Petrochemical Co:, Ltd:, China Petrochemical Corporation Yangzi Petrochemical Branch:
The main drafters of this document: Wang Lingxiao, Lv Zhengzhong, Shi Qingjun, Zheng Huiqin, Wang Huineng, Zhang Xiaomeng, Wang Li, Cui Yinxin, Zhang Lu, Chai Zibin,
Zhu Jianhui, Pei Yanhong, Wang Hongying, Hu Xuexing:
This document was first published in:2009 and this is the first revision:
Determination of Xylene Soluble Content in Plastic Polypropylene
1 Scope
This document specifies three methods for determining the soluble content of polypropylene homopolymers or copolymers in xylene at 25°C:
--- Method A: chemical method;
--- Method B: Infrared Spectroscopy;
--- Method C: low-resolution pulsed nuclear magnetic resonance method:
Method A is the benchmark method used for the calibration of Method B and Method C:
This document applies to the determination of the soluble content of polypropylene homopolymers or copolymers in xylene at 25°C: Additives soluble in xylene
Additives and other materials can affect the determination of xylene soluble content:
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document:
GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values
3 Terms and Definitions
The following terms and definitions apply to this document:
3:1
xylene-solublefraction
ws
The polymer is dissolved in xylene at reflux temperature, and after the solution is cooled to 25 °C and kept for a certain period of time, the substances that are not precipitated in the solution
quality score:
4 Method A: Chemical Method
4:1 Principle
The polypropylene samples were weighed after drying and dissolved in xylene under reflux: The solution was then cooled to 25°C under specified conditions and kept constant
temperature to ensure adequate crystallization of polypropylene under these conditions: The mixed solution was then filtered to obtain a transparent filtrate: Evaporate off the filtrate
Toluene to obtain xylene solubles and calculate their content:
4:2 Instruments and equipment
4:2:1 Reflux condenser, the length is 400mm:
4:2:2 Flask with a volume of 500mL:
4:2:3 Insulation pad, made of ceramic fiber material:
4:2:4 Electromagnetic stirrer, with temperature-controlled heating plate, constant temperature oil bath or heating block, the temperature can be maintained at 140 ℃ ~ 150 ℃:
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