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BS ISO 24076:2021

BS ISO 24076:2021

$102.76

Plastics. Polypropylene (PP). Determination of isotactic index by low-resolution nuclear magnetic resonance spectrometry

Published By Publication Date Number of Pages
BSI 2021 18
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This document specifies a relative method for the determination of polypropylene (PP) isotactic index by low-resolution pulsed nuclear magnetic resonance spectroscopy (LR-NMR).

This method enables the identification and coding of types H propylene (PP-H) plastics according to ISO 19069-1.

This method is suitable for base polymers and is not applicable for mixtures.

NOTE

The direct method for the determination of polypropylene isotactic index is specified in ISO 9113 .

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
10 5 Apparatus
6 Preparation of sample
6.1 General
6.2 Reference samples
7 Method A — Ratio method
7.1 Procedure
7.1.1 Measurement of reference samples by n-heptane extraction
11 7.1.2 LR-NMR measurement procedure of reference samples
7.1.3 LR-NMR measurement procedure of test samples
7.2 Calculation
7.2.1 Calibration curve
7.2.2 Calculation of isotactic index IIna
12 8 Method B — Absolute method
8.1 Procedure
8.1.1 Measurement of reference samples by n-heptane extraction
8.1.2 LR-NMR measurement procedure of reference samples
8.1.3 LR-NMR measurement procedure of test samples
8.2 Calculation
8.2.1 Calibration curve
13 8.2.2 Calculation of isotactic index IInb
9 Expression of results
10 Test report
14 Annex A (informative) Example of a calibration curve for method A
15 Annex B (informative) Example of a calibration curve for method B
16 Bibliography

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BS ISO 24076:2021
$102.76