The hard plastic covers of telephones are made from polymers of
acrylonitrile
styrene
fluoromethane
phenol and formaldehyde
D.
phenol and formaldehyde
Phenol-formaldehyde is used in making covers of telephones. It is made by the reaction of phenol and Formaldehyde.
Step I: Formation of novolac
Step II: On heating above structure, it gives network of phenol and formaldehyde, also known as bakelite.
Select the correct statement
Orlon is an addition polymer
Dacron is an addition polymer
Orlon is a condensation polymer
The monomers of orlon is styrene
Natural rubber is a polymer of monomer isoprene. During polymerisaton
1, 4 addition takes place
1, 2 addition takes place
1,3 addition takes place
both double bonds are converted into single bond
Which one of the following monomers gives the polymer neoprene on polymerisation?
CH2=CH-Cl
CCl2=CCl2
CH2=CCl-CH=CH2
CF2=CF2
Bakelite is the condensation polymer of
C6H5OH and caprolactum
HCHO and phthalic acid
C6H5OH and HCHO
HCHO and ethylene glycol