1. Scope

1.1 These test methods cover the determination of the content of 5-ethylidenenorbornene (ENB) in ethylene-propylene-diene (EPDM) terpolymers. They are applicable to ENB contents in the 0.1 to 10 wt % range.

1.2 ENB is a termonomer introduced in ethylene/propylene rubbers to generate specific cure properties. Since high precision for ENB content determination has become very important, a Fourier Transform Infrared Spectroscopic (FTIR) method was developed. ENB determination was performed in the past by a refractive index technique.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D297 Test Methods for Rubber Products--Chemical Analysis

D1416 Test Methods for Rubber from Synthetic Sources--Chemical Analysis

D3568 Test Methods for Rubber--Evaluation of EPDM (Ethylene Propylene Diene Terpolymers) Including Mixtures With Oil

D3900 Test Methods for Rubber--Determination of Ethylene Units in Ethylene-Propylene Copolymers (EPM) and in Ethylene-Propylene-Diene Terpolymers (EPDM) by Infrared Spectrometry

D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries

E168 Practices for General Techniques of Infrared Quantitative Analysis

E932 Practice for Describing and Measuring Performance of Dispersive Infrared Spectrometers

E1421 Practice for Describing and Measuring Performance of Fourier Transform Mid-Infrared (FT-MIR) Spectrometers: Level Zero and Level One Tests

ANCHA Document

Keywords

Dicyclopentadiene (DCPD) (DCP); ethylene-propylene-diene-monomer (EPDM); ethylidenenorbornene (ENB); DCPD (dicyclopentadiene); ENB (5-ethylidenenorbornene); EPM/EPDM materials/applications; Raw rubber; Rubber property analysis;

ICS Code

ICS Number Code 83.060 (Rubber)

DOI: 10.1520/D6047-99E01

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