Tutorial-6

TUTE-SHEET-6
POLYMERS & POLYMERISATION


1. Explain the following terms with suitable examples
(a) Monomer (b) Polymer (c) Degree of polymerization (d) Functionality (e) Homopolymers and copolymers (f) Inorganic polymers (g) Composites (h) Silicones ( i ) Elastomers
( j ) Block copolymer & Graft copolymer
( k ) Additives in polymers (l) Glass transition temperature.

2. How do you classify the polymer on the basis of :
a) Occurance in nature.
b) Monomer unit.
c) Polymeric structure.
d) Monomeric unit in backbone.
e) Tacticity.
f) Synthesis (chemical combination).
g) Arrangement of monomers in the formation of copolymers.

3. What do you understand by polymerization? Explain the mechanism of following with suitable examples:
i) Addition Polymerization (Chain growth)
a) Free radical Polymerization.
b) Cationic and Anionic polymerization
c) Coordination (Ziegler Natta / Stereo selective) polymerization.
ii) Condensation polymerizations / step growth polymerization.

4. Explain the effect of structure on polymer properties.

5. Differentiate following
a) Thermoplastics and Thermosetting polymers / resins
b) Addition and condensation polymerization
c) Synthetic and Natural rubber
d) Low density polythene (LDPE) & High density polythene (HDPE)