a) Polymerization occurs with repeated elimination of small molecules
b) Polymerization occurs with elimination of single byproduct
c) It occurs by repeated condensation of molecules of monomers
d) Condensation does not occur at all ( AIPG 2010 ) (Repeat: AIPG 2007) \
Option A
“The primary compounds react, often with the formation of by-products such as water, alcohols, halogen acids and ammonia. The formation of these products is the reason step-growthQ polymerization is often called condensation polymerization.”
(Ref: Phillips’ Science of Dental Materials; 11th edition: Page 154)
“Ethyl alcohol is a by-productQ of the condensation setting reaction. Subsequent evaporation probably accounts for much of the contraction that takes place in a set silicone rubber”
(Ref: Phillips’ Science of Dental Materials; 11th edition)
FOR MORE IN DENTISTRY: VISIT RxDENTISTRY LOVEHUES DENTAL MATRIX
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