Polymer Technology
Polyvinyl alcohol is used as a

Water soluble adhesive
Textile fibre
Cation/anion exchanger
Non-sticky coating on frying pans

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Polymer Technology
Pick out the wrong statement regarding the solubility characteristics of high polymers.

High molecul ar weight polymers on dissolving gives solution of very low viscosity
Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
Greater the degree of cross-linking in the polymer, lesser is its solubility

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Polymer Technology
Polyvinyl chloride (PVC)

Can be made thermosetting by adding a plasticiser
Softening temperature is 200°C
Uses either emulsion or suspension polymerisation methods
Is produced by polycondensation reaction

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