I am given a task to extract and determine the gel fraction of a peace of PVA polymer. My concern is the measurement of gel residue on thimble. How can I quantify this quantity?
Dear Reza Sanaei
The gel fraction is defined as the weight ratio of dried network polymer (crosslinked material) to that of the polymer before washing by solvent (acetone, toluene or any other suitable for your polymer solvent).
Calculation: [(W3 – W2) / W1] × 100% = Gel fraction, % (or Crosslinked Material)
where: W1 – weight of the original specimen in grams; W2 – weight of the weighing bottle, cover, and dried filter paper in grams; W3 – weight of the weighing bottle, cover, dried filter paper, and dried residue.The drying temperature is determined by the type of the solvent.
Sincerely,
Svetlana V. Chuppina
Dear Reza Sanaei
The gel fraction is defined as the weight ratio of dried network polymer (crosslinked material) to that of the polymer before washing by solvent (acetone, toluene or any other suitable for your polymer solvent).
Calculation: [(W3 – W2) / W1] × 100% = Gel fraction, % (or Crosslinked Material)
where: W1 – weight of the original specimen in grams; W2 – weight of the weighing bottle, cover, and dried filter paper in grams; W3 – weight of the weighing bottle, cover, dried filter paper, and dried residue.The drying temperature is determined by the type of the solvent.
Sincerely,
Svetlana V. Chuppina
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials Chemistry
- Polymer Chemistry