Polyvinyl alcohol (PVA) is generally
obtained by hydrolysis from polyvinyl
acetate, The solubility of PVA in water is
increased up to 87% of the extent of
hydrolysis but the solubility is rather
reduced It is showing, Explain why
Solution
This may be due to the hydrogen bonding interactions.
In the case of fully hydrolysed polyvinyl alcohols, the inner molecuar hydrogen bonding will be very high.That causes insolubility. But in the case of partially hydrolysed polyvinyl alcohols,the hydrogen bonding is balancing with with the desired aqueous solubility. The residual acetate groups reduce the combination by reducing the regularity of the chain structure.
Hence the answer.
.
Polyvinyl alcohol (PVA) is generally obtained by hydrolysis from polyv.docx
1. Polyvinyl alcohol (PVA) is generally
obtained by hydrolysis from polyvinyl
acetate, The solubility of PVA in water is
increased up to 87% of the extent of
hydrolysis but the solubility is rather
reduced It is showing, Explain why
Solution
This may be due to the hydrogen bonding interactions.
In the case of fully hydrolysed polyvinyl alcohols, the inner molecuar hydrogen bonding will be
very high.That causes insolubility. But in the case of partially hydrolysed polyvinyl alcohols,the
hydrogen bonding is balancing with with the desired aqueous solubility. The residual acetate
groups reduce the combination by reducing the regularity of the chain structure.
Hence the answer.
