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how did the addition of acid and base impact the polymer? at the chemical structure level, what could have led to these observations? (hint: which molecule makes linkages with pva? what molecule is present in greater quantities in an acidic solution? what molecule is present in greater quantities in a basic solution?) you can include chemical structures to make your point.



Answer :

The acid-base interactions significantly affect polymer formation when adding solid acids or bases.

What is PVA?

PVA is in produced by polymerization of vinyl acetate followed by hydrolysis of the resulting poly(vinyl acetate)

Physical crosslinking occurs between same PVA molecules via hydrogen bonding between hydroxyl groups or simply entanglements.

An acidic solution has high concentration of hydrogen ions ( H+)

  • if acid medium PVA polymerisation initiated through cationic species which is generated by removal of water, at teminal end alcohol group present in polymeric chain
  • if basic medium PVA polymerisation initiated through alkoxy anion species which is generated by removal of
  • proton, at teminal end vinyloxy (alkoxy) group present in polymeric chain

Learn more about polymerization at - Brainly.com https://brainly.com/question/3539439

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