5 scintillation vials were filled with 15 mL of solvent, the polymer sample was them dropped into the vial so that it was fully immersed. Visual observations were taken every 10 minutes for the first hour after immersion.
| Chemical
|
Appearance at T0
|
T0+10 minutes
|
T0+20 minutes
|
T0+30 minutes
|
T0+40
|
T0+50
|
T0+60
|
| Benzaldehyde
|
Clear, Yellow
|
NC
|
Sample sticking to bottom of vial
|
NC
|
CLD, 1
|
NC
|
NC -1
|
| Cyclopentanone
|
Cloudy, colorless
|
CLD
|
NC
|
NC
|
CLD, 1
|
NC
|
NC -1
|
| Ethyl Benzoate
|
Clear, Colorless
|
NC
|
NC
|
NC
|
NC
|
NC
|
NC -0
|
| 2-pyrrolidone
|
Clear, Slightly Yellow
|
NC
|
PART
|
NC
|
CLD
|
NC
|
NC -0
|
| Triethyl Phosphate
|
Clear, Colorless
|
CLD
|
NC
|
NC
|
CLD, 1
|
NC
|
NC -1
|
Observation Visual Code: NC - No change, C,C - Clear, colorless, SW - Swelling, CLD- cloudy, PART - Particulate, 0-dissolution less than 90%, 1 - dissolution greater than 90%
Based on the results of this test, Acetone, Ethyl Acetate, 1,3-dioxolane, and propylene carbonate are all viable solvents for the dissolution of the client's proprietary polymer.
Based on the results of this test, Benzaldehyde, Cyclopentanone, and Triethyl Phosphate have all been found to be suitable solvents for the dissolution of the client's proprietary polymer. Further research will be directed towards generating an HSPiP Sphere and evaluating health and safety criteria of identified viable alternatives.