Polymer Technology
Amino resins are used in paper treatment to improve its

Folding endurance
All of these
Wet rub resistance
Wet tear and bursting strength

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Polymer Technology
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

Reduce the time of vulcanisation and quantity of vulcanising agent
Protect rubber goods from attack by oxygen & ozone present in the atmosphere
Increase its viscosity
Reduce its viscosity to permit easier processing

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