Category: Polymer Technology

A. Deforms, if stretched to double of its original dimension
B. Is brittle at low temperature
C. Is softer at higher temperature
D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

A. Acrylonitrile & butadiene
B. Acrylonitrile & styrene
C. Isobutylene & isoprene
D. None of these

A. Densities
B. Melting point
C. Tensile strength
D. Hardness, rigidity & brittleness

A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resin
D. All A., B. and C.

A. Molecular sizes
B. Magnitude of intermolecular forces
C. Resistance to heat
D. Polymerisation mechanism
Answer: Option B

A. Automobile cushion
B. Thermal insulation in refrigerator
C. Coating and adhesive
D. Fibre reinforced plastic (FRP)

A. Vinyl acetate
B. Vinyl chloride
C. Propylene
D. Styrene

A. PTFE
B. Buna-S
C. PMMA
D. Polycaprolactam

A. Blow moulding
B. Vacuum thermo forming
C. Injection moulding
D. None of these

A. Are made by addition polymerisation reaction only
B. Contain an epoxy group (fig bellow) at the ends of the polymer
C. Are cross-linked polymers only
D. Use emulsion polymerisation methods