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.
Which one of the following monomers gives the polymer neoprene on polymerisation?
CH2=CH-Cl
CCl2=CCl2
CH2=CCl-CH=CH2
CF2=CF2
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
Bakelite is the condensation polymer of
C6H5OH and caprolactum
HCHO and phthalic acid
C6H5OH and HCHO
HCHO and ethylene glycol
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