Buna-S is a _______________ material?
A. Fibrous
B. Plastic
C. Resinous
D. Rubbery
Polymer Technology
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ?
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ?
A. Starch
B. Cellulose
C. Proteins
D. Nucleic acids
______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
A. Epoxy
B. Amino
C. Alkyd
D. Phenolic
Condensation polymerisation of _____________ produces Bakelite?
Condensation polymerisation of _____________ produces Bakelite?
A. Propylene
B. Phenol & formaldehyde
C. Phenol & acetaldehyde
D. Urea & formaldehyde
Polystyrene is a ____________ plastic at room temperature?
Polystyrene is a ____________ plastic at room temperature?
A. Ductile
B. Brittle
C. Malleable
D. None of these
SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________?
SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________?
A. 1: 3
B. 3 : 1
C. 1 : 2
D. 2 : 1
A copolymer of vinyl and vinylidene chloride is called_____________________?
A copolymer of vinyl and vinylidene chloride is called_____________________?
A. Treylene
B. Orlon
C. Saran
D. Dacron
Poly-methyl-methacrylate (PMMA) is known as_______________?
Poly-methyl-methacrylate (PMMA) is known as_______________?
A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6
Molecular weights of plastics ranges from_______________?
Molecular weights of plastics ranges from_______________?
A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 109 to 1011
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 ?
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