Which polymer is used for coating cookware to make them non-sticky?
PET
PAN
Teflon
Perlon
When condensation product of hexamethylenediamine and adipic acid is heated to 553 K (80o) in an atmosphere of nitrogen for about 4-5 h, the product obtained is
Solid polymer of nylon - 66
Liquid polymer of nylon- 66
Gaseous polymer of nylon-66
Liquid polymer of nylon - 6
2- methyl propene
Styrene
Propylene
Ethene
Neoprene is
A monomer of rubber
Synthetic rubber
Natural rubber
Vulcanized rubber
Plexi glass is a commercial name of
Glyptal
Polyacrylonitrile
Polymethyl methacrylate
Polyethyl acrylate
For the formation of terylene, the number of moles of ethylene glycol required per mole of terephthalic acid is
1
3
2
4
Which of the following is not a synthetic rubber?
Neoprene
SBR
Thiokol
Orlon
Which of the following is a chain growth polymer?
Starch
Nucleic acid
Polystyrene
Protein
In elastomers, intermolecular forces are
Natural rubber is not used in making footwear for polar regions because
Natural rubber becomes soft at temperature lower than 10oC
Natural rubber becomes brittle at temperature lower than 10oC.
Natural rubber melts at temperature lower than 10oC.
Natural rubber becomes stronger at temperature lower than 10oC.
