TABLE OF CONTENTS Miscellaneous properties of polymers for which test standards exist are listed in Table 19.1 together with details of suppliers of test equipment.
| Method | Specfication test | Equipment supplier |
|---|---|---|
| Water Absorption | ||
| Water absorption of polymers | ASTM D570 [1] DIN 7708 [2] | |
| Gas Permeability | ||
| Gas permeability of elastomers (water vapour, CO 2 and O 2) | DIN | ATS FAAR Code Nos. 10.08050 and 10.08100 |
| Chemical Resistance | ||
| Chemical resistance | ASTM D543 [3] | |
| Solvent resistance | ASTM D543 [3] | ATS FAAR Code Nos. 10.47000 and 10.47005 |
| Ozone resistance | ASTM | Gibitre Ozone Cabinet available from Negretti Automation Ltd. |
| Environmental stress cracking resistance | ASTM | ATS FAAR Code No. 10.36000 |
| Miscellaneous Properties | ||
| Hydrogen chloride content of PVC | CEI | ATS FAAR Code No. 11.00050 |
| Carbon black content of polyethylene | ASTM | ATS FAAR Code No. 11.00001 |
| Carbon black dispersion in rubbers | - | Tangent Electroscanner Negretti Automation Ltd |
| Particle distribution | See Table 19.2 | |
| Source: Author's own files |
| Instrument | Type | Particle size range | Analysis time, s | Measurement |
|---|---|---|---|---|
| Coulter Multisizer | Coulter | 0.4 1200 m (overall) 0.4 336 m for distributions to be expressed as volume (weight) against size | 30 90 | Counting and sizing |
| Model ZM (more basic than multisizer) | Coulter | 0.4 1200 m | - | Counting and sizing |
| Coulter LS Series particle size distribution analyser | Laser light diffraction | 0.1 810 m | 60 | Particle sizing |
| LS130 LS100 | ||||
| Coulter Series Model N4 | Photon correlation spectroscopy (auto... |
