GB/T 21464-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21464-2025	RFQ	ASK	3 days	Rubber - Determination of 5-ethylidenenorbornene (ENB) or dicyclopentadiene (DCPD) in ethylene-propylene-diene (EPDM) terpolymers	Valid
GB/T 21464-2008	234	Add to Cart	3 days	Rubber -- Determination of 5-Ethylideneonbornene (ENB) or Dicyclopentadiene (DCPD) in Ethylene-Propylene-Diene (EPDM) terpolymers	Valid

Basic data

Standard ID: GB/T 21464-2025 (GB/T21464-2025)
Description (Translated English): Rubber - Determination of 5-ethylidenenorbornene (ENB) or dicyclopentadiene (DCPD) in ethylene-propylene-diene (EPDM) terpolymers
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 21464-2008

GB/T 21464-2008: Rubber -- Determination of 5-Ethylideneonbornene (ENB) or Dicyclopentadiene (DCPD) in Ethylene-Propylene-Diene (EPDM) terpolymers

---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.
Rubber. Determination of 5-Ethylideneonbornene (ENB) or Dicyclopentadiene (DCPD) in Ethylene-Propylene-Diene (EPDM) terpolymers ICS 83.060 G35 National Standards of People's Republic of China GB/T 21464-2008/ISO 16565.2002 Rubber, ethylene - propylene - diene (EPDM) Terpolymers of 5-ethylidene-norbornene (ENB) Determination or dicyclopentadiene (of DCPD) content (ISO 16565.2002, IDT) Posted 2008-02-26 2008-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is equivalent to international standard ISO 16565.2002 "Rubber ethylene - propylene - diene (EPDM) terpolymer 5-vinyl Determination fork down norbornene (ENB) or dicyclopentadiene (DCPD) content "(in English). This standard is equivalent to translate ISO 16565.2002. For ease of use, this standard made the following editorial changes. --- Number of formulas; --- To make clearer graphics, ease of understanding, Figure 1, Figure 2, Figure 3 re-identification, will be split into 4 Figure 4 (a) and 4 (b), And re-identify. Appendix A of this standard is a normative appendix. The standard proposed by China Petroleum and Chemical Corporation. This standard by the National Standardization Technical Committee rubber and rubber products, synthetic rubber Technical Committee (SAC/TC35/SC6) Centralized. This standard was drafted. Lanzhou Petrochemical Research Institute of Chemical Co., Ltd. China Branch of Petroleum, China National Petroleum Jilin Petrochemical Company Limited organic synthesis plant. The main drafters of this standard. Wang Jin, Zhao Jialin, Wu Yi, Li Li. This standard is the first release. GB/T 21464-2008/ISO 16565.2002 ± 1% or higher. The spectral resolution of the instrument 2cm-1. We recommend the use of deuterated sulfuric three GSH (DTGS) detector or use mercury cadmium telluride (MCT) detector. Spectrometer should have spectral overlay, average, subtraction and other processing functions. Water is the main source of the interference method. To obtain a satisfactory precision Degree, we need to physically and electrically atomization method and extent of changes in the atomization minimum. A better approach is to use with dry Dry gas purge and sample shuttle instruments, samples collected shuttle can alternately repeated single beam sample spectrum and the background spectrum (see Section 5 chapter). In addition, if no sample shuttle, carefully purged with dry nitrogen sample chamber can be satisfied with the measurement results. Full sweep GB/T 21464-2008/ISO 16565.2002 ......

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