3.1 For research, development, and quality control purposes, it is advantageous to determine the composition of rubbers in cured, compounded products.
3.2 This practice provides such composition analysis, utilizing a gas chromatograph and pyrolysis products from rubber decomposition.
1.1 This practice covers the identification of polymers in raw rubbers, and cured and uncured compounds, based on a single polymer, by the gas chromatographic patterns of their pyrolysis products (pyrograms). Implementation of this guide presupposes a working knowledge of the principles and techniques of gas chromatography, sufficient to carry out this practice and to interpret the results correctly.2
1.3 This practice will not differentiate the following polymers:
1.3.2 Butadiene-styrene copolymers produced by solution and emulsion polymerization. It is sometimes possible to distinguish butadiene-styrene copolymers containing different amounts of styrene as well as random polymers from block polymers.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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