GB/T 21464-2025 in English
VALIDRubber—Determination of 5-ethylidenenorbornene (ENB) or dicyclopentadiene (DCPD) in ethylene-propylene-diene (EPDM) terpolymers
- Issued on:2025-08-29
- Implemented on:2026-03-01
- File Format:PDF
- Delivery:Via email within 5 business days
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| Standard No: | GB/T 21464-2025 |
| Document status: | VALID |
| Title in English: | Rubber—Determination of 5-ethylidenenorbornene (ENB) or dicyclopentadiene (DCPD) in ethylene-propylene-diene (EPDM) terpolymers |
| Title in Chinese: | 橡胶 乙烯-丙烯-二烯烃（EPDM）三元共聚物中5-乙叉降冰片烯（ENB）或双环戊二烯（DCPD）的测定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2025-08-29 |
| Implemented on: | 2026-03-01 |
| Superseding: |
GB/T 21464-2008 Rubber - Determination of 5-Ethylidenenorbornene（ENB）or Dicyclopentadiene（DCPD） in Ethylene-Propylene-Diene (EPDM) Terpolymers
|
| ICS Classification: | 83.040.10-Latex and raw rubber |
| Chinese Classification: | G35-Synthetic rubber |
| Professional Classification: | GB-National Standard |
| Related Keywords: | ethylene-propylene-diene monomer
rubber determination epdm rubbers rubber materials ethylene-propylene-diene |
| Related Topics: | Diene chain
Six-membered cycloalkene |
《GB/T 21464-2025橡胶 乙烯-丙烯-二烯烃（EPDM）三元共聚物中5-乙叉降冰片烯（ENB）或双环戊二烯（DCPD）的测定》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC6（全国橡胶与橡胶制品标准化技术委员会合成橡胶分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
This standard provides a method for determining the content of 5-ethylidene norbornene (ENB) or dicyclopentadiene (DCPD) in ethylene-propylene-diene monomer (EPDM) terpolymer. The procedure is designed to ensure accurate and consistent measurement of these components, which are critical in the production of rubber materials. The method outlines specific analytical techniques and conditions to achieve reliable results. It includes details on sample preparation, testing procedures, and data interpretation. The standard is applicable to manufacturers and testing laboratories involved in the production and quality control of EPDM rubbers. The method is structured to support reproducibility and comparability of test results across different laboratories.
*** Please note: This description may not be accurate, please refer to the official documentation.
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