Valid

GB/T 41940-2022Rubber - Determination of viscosity and stress relaxation using a rotorless sealed shear rheometer (English PDF)

橡胶用无转子密闭剪切流变仪测定黏度和应力松弛

Preview PDF

This is a limited preview

Buy now to download the full PDF (30 pages)

Need quotation for your management?

Get a formal quotation for GB/T 41940-2022 in 30 minutes.

Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 30, 2022

Implementation date

April 1, 2023

Scope

GB/T 41940-2022 is the English-translated version of 橡胶用无转子密闭剪切流变仪测定黏度和应力松弛.

GB/T 41940-2022 is the Chinese standard "Rubber - Determination of viscosity and stress relaxation using a rotorless sealed shear rheometer". Its scope clause reads: 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. Its clauses include terms and definitions.

Found what you need?

Document preview — GB/T 41940-2022

National Standard of the People's Republic of China

ICS: 83.060
Classification: G 40

Issued by: State Administration for Market Regulation, China National Standardization Administration

Introduction
1 Scope
2 Normative references

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

gamma(t)

The strain produced by the oscillations of the mold bodies that make up the test cavity.

Note. Given by the formula gamma(t)=gamma0sin(omegat), gamma0 is the maximum amplitude of the applied strain.

3.3 Loss angle

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. […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 18899.2004 · ISO 1382 · ISO 1382.2008

How to Download GB/T 41940-2022

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.