BS ISO 6721-9:2019 – TC:2020 Edition
$134.27
Tracked Changes. Plastics. Determination of dynamic mechanical properties – Tensile vibration. Sonic-pulse propagation method
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 34 |
This document describes a pulse propagation method for determining the storage component of the complex tensile modulus E‘ of polymers at discrete frequencies typically in the range 3 kHz to 10 kHz. The method is suitable for measuring materials with storage moduli in the range 0,01 GPa to 200 GPa and with loss factors below 0,1 at around 10 kHz. With materials having a higher loss, significant errors in velocity measurement are introduced through decay of amplitude.
The method allows measurements to be made on thin films or fine fibres and long specimens, typically tapes of 300 mm × 5 mm × 0,1 mm or fibres of 300 mm × 0,1 mm (diameter).
This method may not be suitable for cellular plastics, composite plastics and multilayer products.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | compares BS ISO 6721-9:2019 |
| 2 | TRACKED CHANGES Text example 1 — indicates added text (in green) |
| 3 | Compliance with a British Standard cannot confer immunity from legal obligations. |
| 7 | Foreword Foreword to amendment 1 |
| 9 | 1 Scope 3 Terms and Definitions 3.1 longitudinal sonic pulse |
| 10 | 5.1 Apparatus Figure 1 — Schematic diagram of suitable apparatus for measuring sonic pulse velocity between a transmitting and a receiving transducer 5.2 Transducers 5.3 Transducer drive unit |
| 11 | 5.4 Pulse arrival time measuring equipment 5.5 Temperature measurement and control equipment 6.1 General 6.16.2 Shape and dimensions 6.26.3 Preparation 9.1 Test atmosphere 9.2 Mounting the specimen 9.3 Performing the test |
| 12 | Figure 2 — Example of linear regression of distance and arrival time 9.4 Varying the temperature 10.1 NomenclatureSymbols |
| 13 | 10.2 Calculation of the longitudinal wave velocity 10.3 Calculation of the tensile storage modulus, E’ 10.4 Significant figures |
| 14 | Figure 1 — Schematic diagram of suitable apparatus for measuring pulse velocity between a transmitting and a receiving transducer |
| 15 | Figure 2 — Linear regression of distance and arrival time |
| 18 | Bibliography |
| 20 | National foreword |
| 24 | Foreword |
| 25 | 1 Scope 2 Normative references 3 Terms and definitions |
| 26 | 4 Principle 5 Test device 5.1 Apparatus 5.2 Transducers 5.3 Transducer drive unit |
| 27 | 5.4 Pulse arrival time measuring equipment 5.5 Temperature measurement and control equipment 6 Test specimens 6.1 General 6.2 Shape and dimensions 6.3 Preparation 7 Number of specimens 8 Conditioning 9 Procedure 9.1 Test atmosphere 9.2 Mounting the specimen 9.3 Performing the test |
| 28 | 9.4 Varying the temperature 10 Calculation and expression of results 10.1 Symbols |
| 29 | 10.2 Calculation of the longitudinal wave velocity 10.3 Calculation of the tensile storage modulus, E’ 10.4 Significant figures 11 Precision 12 Test report |
| 31 | Annex A (informative) Precision |
| 32 | Bibliography |
