Polymer Technology

131. Nylon-66 is a polyamide of

1. Hexamethylene diamine and adipic acid
2. Adipic acid and methyl amine
3. Vinyl chloride and formaldehyde
4. None of these

View answer

132. Nylon-66 is manufactured from

1. Adipic acid and Hexamethylene diamine
2. Caprolactam
3. Maleic anhydride and Hexamethylene diamine
4. Dimethyl terephthalate (DMT) and ethylene glycol

View answer

133. Orion is

1. A copolymer
2. A condensation polymer
3. Obtained by polymerising vinyl cyanide
4. All (A), (B) and (C)

View answer

134. Orlan fibre which is used as a wool substitute is

1. An amorphous polymer
2. A natural polymeric fibre
3. Polyacrylonitrile
4. Poly-methyl-methacrylate (PMMA)

View answer

135. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of _________ percent.

1. 1-1000
2. 1000-1500
3. 1500-2000
4. 2000-2500

View answer

136. Paper like thin plastic articles can be produced by

1. Blow moulding
2. Vacuum thermo forming
3. Injection moulding
4. None of these

View answer

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

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

View answer

138. Perspex can be used as a substitute of glass. Its monomer is

1. Methyl methacrylate
2. DMT
3. Butadiene
4. Tetrafluoroethylene

View answer

139. Phenol formaldehyde

1. Employs addition polymerisation
2. Employs condensation polymerisation
3. Is a monomer
4. Is an abrasive material

View answer

140. Phenol formaldehyde is produced by condensation polymerisation. It is also known as

1. Teflon
2. Bakelite
3. Polyester
4. Nylon-66

View answer