Polymer Technology Density of low density polythene is about __________ gm/c.c. 0.81 0.56 0.38 0.91 0.81 0.56 0.38 0.91 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The main use of butadiene is As a plasticiser for unsaturated polyester As an anti-skimming agent in paint In the manufacture of synthetic rubber None of these As a plasticiser for unsaturated polyester As an anti-skimming agent in paint In the manufacture of synthetic rubber None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Protect rubber goods from attack by oxygen & ozone present in the atmosphere Increase its viscosity Reduce its viscosity to permit easier processing 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 Reduce the time of vulcanisation and quantity of vulcanising agent ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Epoxy resins (i.e., epoxide polymers) Are made by addition polymerisation reaction only Are cross-linked polymers only Use emulsion polymerisation methods Contain an epoxy group ( ##### ) at the ends of the polymer Are made by addition polymerisation reaction only Are cross-linked polymers only Use emulsion polymerisation methods Contain an epoxy group ( ##### ) at the ends of the polymer ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer? Nylon-6 Polythene Polyester Bakelite (phenol formaldehyde) Nylon-6 Polythene Polyester Bakelite (phenol formaldehyde) ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Starting material for the production of SBR is Both A & B Ethyl alcohol Neither A nor B Ethylene Both A & B Ethyl alcohol Neither A nor B Ethylene ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS