Related Questions

Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
A PTFE
B Buna-S
C PMMA
D Polycaprolactum
Teflon is a polymer of which of the following monomers?
A Tetrafluroethylene
B Vinyl chloride
C Chloroprene
D Accetylene dichloride
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?
A Bakelite (phenol formaldehyde)
B Polyester
C Polythene
D Nylon-6
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
A Polythene
B PVC
C Rayon
D Polyvinyl acetate
Polymerisation process in which two or more monomers of chemically different nature take part is called
A Copolymerisation
B Addition polymerisation
C Chain polymerisation
D None of these
Which of the following polymers is obtained by copolymerisation of three monomers?
A SAN
B ABS
C SBR
D PTFE
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
A Nylon-66
B Teflon
C Polyester
D Bakelite
The monomers of dacron are
A Decane and decanol
B Decanone and decanol
C Ethylene glycol and terephthalic acid
D Ethylene glygol and phthalic acid
Polymerisation of poly functional monomers produces polymers having
A Good machanical strength
B Low viscosity
C Low melting point
D None of these

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