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GB/T 41940-2022 English PDF

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GB/T 41940-2022: Rubber - Determination of viscosity and stress relaxation using a rotorless sealed shear rheometer
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Basic data

Standard ID GB/T 41940-2022 (GB/T41940-2022)
Description (Translated English) Rubber - Determination of viscosity and stress relaxation using a rotorless sealed shear rheometer
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G40
Classification of International Standard 83.060
Word Count Estimation 18,180
Date of Issue 2022-12-30
Date of Implementation 2023-04-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 41940-2022: Rubber - Determination of viscosity and stress relaxation using a rotorless sealed shear rheometer


---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.
ICS 83.060 CCSG40 National Standards of People's Republic of China Determination of rubber with rotorless closed shear rheometer Viscosity and Stress Relaxation sealed shearrheometer Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

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 for Standardization Documents" drafting. This document is equivalent to ISO 13145.2012 "Determination of Viscosity and Stress Relaxation by Rotorless Sealed Shear Rheometer for Rubber". Please note that some contents of this document may refer to patents. 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 sponsored by the General Test Method Subcommittee of National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35/SC2) Focus on. This document is drafted by. Sailun Group Co., Ltd., Xuzhou Xulun Rubber Co., Ltd., Zhongce Rubber Group Co., Ltd., Shuang Star Group Co., Ltd., Guizhou Tire Co., Ltd., Triangle Tire Co., Ltd., Double Coin Group Shanghai Tire Research Institute Co., Ltd. Company, High-speed Rail Testing Instrument (Dongguan) Co., Ltd., Beijing Ruida Yuchen Instrument Co., Ltd., Anhui Nuojia Instrument Co., Ltd., Jiangsu Ming Zhu Test Machinery Co., Ltd., Jiangsu Xinzhenwei Test Machinery Co., Ltd., Fengshen Tire Co., Ltd., Taizhou Gangyang Rubber and Plastic Co., Ltd. Division, Shandong Yanggu Huatai Chemical Co., Ltd., Liaoning Tieling Rubber Industry Research and Design Institute, Beijing University of Chemical Technology, Xuzhou Industrial Vocational Technology Technical College, Zhongqi Metrology System Certification Center Chemical Control Testing Technology Sub-Center, Beijing Rubber Industry Research and Design Institute Co., Ltd. The main drafters of this document. Zhang Xiaojun, Yang Wenzhen, Wei Bangfeng, Li Jian, Liu Li, Guo Fei, Qiu Zhaojing, Feng Ping, Su Juqiao, Ni Shujie, Li Wei, Dong Wenwu, Zhang Lingyan, Chen Yongdian, Wang Peng, Chen Lei, Zhang Rong, Zhu Muzhi, Shen Kehui, Di Sheng, Liu Qingqing, Kan Zhiqian, Xu Jinhai, Ma Delong, Li Yunfeng, Shi Yanling, Li Mingze, Chen Lifang, Xu Yunhui, Wang Zaixue, Guo Dayan, Xie Junfang, Sun Siwen.

Introduction

The rheological properties of rubber are related to the structural properties of rubber, and the rheological properties will affect the performance of rubber during processing and the properties of final products. able. Therefore, industrial environments require instruments that can quickly and easily evaluate the rheological properties of rubber. This test method is to use a rotorless closed shear rheometer to evaluate the rheological properties of rubber under specified conditions. At present, the rubber industry still widely uses the method standard (ISO 289-1) for the determination of Mooney viscosity by Mooney viscometer. This test method can as an alternative. The test conditions selected for this test method provide shear rates similar to Mooney viscosity measurements with good reproducibility. This test should be completed in a short time, and it is recommended to be carried out in automatic mode to optimize test efficiency. Determination of rubber with rotorless closed shear rheometer Viscosity and Stress Relaxation Caution --- Personnel using this document need to have practical experience in formal laboratory work. This document does not address all possible security issues The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in the relevant national laws and regulations.

1 Scope

This document describes a test method for measuring the viscosity and stress relaxation of raw and mixed rubber under specified conditions. The determination of viscosity is carried out under the condition of constant strain, temperature and frequency, and the elasticity in the complex shear modulus can be determined during the test. shear modulus and loss shear modulus. The determination of shear stress relaxation is carried out under the condition of constant static strain and temperature, and the drop of torque can be measured during the test.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 25269-2010 Guidelines for Calibration of Rubber Test Equipment (ISO 18899.2004, IDT) ISO 1382 Rubber-Vocabulary Note. GB/T 9881-2008 rubber terms (ISO 1382.2008, MOD) Note. GB/T 25269-2010 Guidelines for Calibration of Rubber Test Equipment (ISO 18899.2004, IDT)

3 Terms and Definitions

The terms and definitions defined in ISO 1382 and the following apply to this document. 3.1 A temperature-controlled mold cavity consisting of two phantoms, one of which can be moved relative to the other to stress or strain. 3.2 sinusoidal strain γ(t) The strain produced by the oscillations of the mold bodies that make up the test cavity. Note. Given by the formula γ(t)=γ0sin(ωt), γ0 is the maximum amplitude of the applied strain. 3.3 Loss angle lossangle The phase angle between stress and strain. Note. This is an indicator to measure the performance and degree of the viscous behavior of the material. For viscoelastic materials, the phase angle is between 0° and 90°. Ideal Newtonian fluid phase angle is 90°. 1) ISO 18899.2004 has been abolished and replaced by ISO 18899.2013.Undated references in Appendix A.

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