Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
Options
A. organic peroxides
B. sulphuric acid
C. hydroflouric acid
D. none of these
Correct Answer
organic peroxides
Polymer Technology problems
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1. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces
5. Pick out the wrong statement regarding the solubility characteristics of high polymers.
Options
A. Greater the degree of cross-linking in the polymer, lesser is its solubility.
B. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents.
C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent.
D. High molecul ar weight polymers on dissolving gives solution of very low viscosity.