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GB/T 40722.2-2021 English PDF

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US$334.00 · In stock
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GB/T 40722.2-2021: Styrene-butadiene rubber(SBR) - Determination of the microstructure of solution-polymerized SBR - Part 2: FTIR with ATR method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40722.2-2021	334	Add to Cart	4 days	Styrene-butadiene rubber(SBR) - Determination of the microstructure of solution-polymerized SBR - Part 2: FTIR with ATR method	Valid

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Basic data

Standard ID: GB/T 40722.2-2021 (GB/T40722.2-2021)
Description (Translated English): Styrene-butadiene rubber(SBR) - Determination of the microstructure of solution-polymerized SBR - Part 2: FTIR with ATR method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G35
Word Count Estimation: 18,121
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40722.2-2021: Styrene-butadiene rubber(SBR) - Determination of the microstructure of solution-polymerized SBR - Part 2: FTIR with ATR method

---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.
Styrene-butadiene rubber(SBR) - Determination of the microstructure of solution-polymerized SBR - Part 2.FTIR with ATR method ICS 83.060 CCSG35 National Standards of People's Republic of China Styrene-butadiene rubber (SBR) Determination of the Microstructure of SBR by Solution Polymerization Part 2.Infrared Spectroscopy ATR Method (ISO 21561-2.2016, IDT) Released on 2021-10-11 2022-05-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Principle 1 5 Instrument 1 5.1 Infrared spectrometer 1 5.2 ATR Annex 2 6 Calibration 2 6.1 Infrared spectrometer 2 6.2 ATR Annex 2 7 Sampling 2 8 Step 2 of determining ATR spectrum 9 Determination of butadiene microstructure and styrene content 2 9.1 Determination of the absorbance of each microstructure component 2 9.2 Calculation of microstructure 4 9.2.1 General 4 9.2.2 Baseline correction of absorption peak 4 9.2.3 Absorbance ratio 4 9.2.4 Second-order term 4 9.2.5 Regression equation of styrene content and microstructure 4 9.2.6 Molar fraction of microstructure (%) 5 10 Precision 5 11 Test report 5 Appendix A (informative) Precision results obtained through the inter-laboratory test protocol 6 Appendix B (informative) Obtaining the microstructure regression equation 8 Appendix C (Informative) Determination of Microstructure by Nuclear Magnetic Method 10 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" Drafting. This document is the second part of GB/T 40722 "Measurement of SBR Microstructure by Solution Polymerization of Styrene-Butadiene Rubber (SBR)". GB/T 40722 has released the following parts. ---Part 2.Infrared spectroscopy ATR method. The translation method used in this document is equivalent to the ISO 21561-2.2016 "SBR solution polymerization of styrene-butadiene rubber (SBR). Determination of structure Part 2.Infrared spectroscopy ATR method. A chapter "Terms and Definitions" has been added to this document. The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows. ---GB/T 15340-2008 Natural and synthetic raw rubber sampling and sample preparation methods (ISO 1795.2000, IDT). Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is organized by the National Rubber and Rubber Products Standardization Technical Committee Synthetic Rubber Subcommittee (SAC/TC35/SC6) Focus. This document was drafted by. PetroChina Research Institute of Petroleum and Chemical Industry, China National Petroleum Corporation Shanzi Petrochemical Branch, Yiweiyi Rubber Research Institute Co., Ltd., Shenhua Chemical Industry Co., Ltd., Ningbo Customs Technology Center. The main drafters of this document. Zhao Jialin, Gao Dujuan, Li Xiaoyin, Zhang Huaqiang, Qin Peng, Li Qiang, Wang Chao, Gu Yongjun, Xu Shanhao, Sun Feng.

Introduction

The microstructure content directly affects the processing and application performance of solution polymerized styrene-butadiene rubber (S-SBR), which is important for guiding the new production of S-SBR. Product development and product quality control are of great significance. With the development of analytical detection technology, 1H-NMR method, infrared spectrum coating method, infrared spectrum ATR method and other detection methods are used for Determination of polymer microstructure. GB/T 40722 provides a technical basis for measuring the microstructure of solution polymerized styrene-butadiene rubber. GB/T 40722 is intended to be composed of two parts. ---Part 1.1H-NMR method and infrared spectroscopy coating method. The purpose is to satisfy the use of hydrogen nuclear magnetic resonance spectroscopy and infrared spectroscopy. Membrane method user's measurement needs. ---Part 2.Infrared spectroscopy ATR method. The purpose is to meet the measurement needs of users using infrared spectroscopy ATR method. Styrene-butadiene rubber (SBR) Determination of the Microstructure of SBR by Solution Polymerization Part 2.Infrared Spectroscopy ATR Method Warning---The personnel using this document should have practical experience in formal laboratory work. This document does not indicate all possible safety issues It is the responsibility of users to take appropriate safety and health measures and to ensure compliance with the conditions stipulated by relevant national laws and regulations. Note---Some procedures in this document may involve the use or generation of substances that are harmful to the local environment, or may generate waste, After use, it should be safely handled and disposed of in accordance with the corresponding documents.

1 Scope

This document describes the use of Fourier Transform Infrared Spectroscopy (FTIR) Attenuated Total Reflectance (ATR) for the determination of solution polymerized styrene-butadiene The steps of the butadiene microstructure and styrene content in rubber (S-SBR). The styrene content is relative to the mass fraction of the entire polymer. The content of 1,4-trans structure, 1,4-cis structure, and 1,2-vinyl structure is the mole fraction (%) relative to the butadiene portion. This document applies to S-SBR raw rubber. Note 1.For S-SBR containing polystyrene or styrene content greater than 45%, the precision shown in Appendix A may not be obtained. Note 2.This document uses "vinyl", "trans" and "cis". Usually vinyl, trans and cis are expressed as follows. --- Vinyl. vinyl unit, vinyl bond, 1,2-unit, 1,2-bond, 1,2-vinyl unit or 1,2-vinyl bond; ---Trans. 1,4-trans unit, 1,4-trans bond, trans-1,4-unit or trans 1,4-bond; --- cis. 1,4-cis unit, 1,4-cis bond, cis-1,4-unit or cis-1,4 bond.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. ISO 1795 Natural raw rubber and synthetic raw rubber sampling and sample preparation method (Rubber, rawnaturalandrawsynthetic- Samplingandfurtherpreparativeprocedures)

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Principle

The infrared spectrum of S-SBR was obtained by infrared spectroscopy ATR method. According to the corresponding microstructure of butadiene unit and styrene The absorbance at a specific wavelength, using the formula specified in this document, calculate the content of each component.

5 Instruments

5.1 Infrared spectrometer The infrared spectrum should meet the following conditions. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 40722.2-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 40722.2-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 40722.2-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 40722.2-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.