Q.Write the names and structures of the monomers of the following polymers:

(i) Buna-S: copolymer of

• Buta-1,3-diene: $CH_2=CH-CH=CH_2$
• Styrene: $C_6H_5-CH=CH_2$

(ii) Buna-N: copolymer of

• Buta-1,3-diene: $CH_2=CH-CH=CH_2$
• Acrylonitrile: $CH_2=CH-CN$

(iii) Dacron (Terylene): condensation polymer of

• Ethylene glycol: $HO-CH_2-CH_2-OH$
• Terephthalic acid: $HOOC-C_6H_4-COOH$ (benzene-1,4-dicarboxylic acid)

(iv) Neoprene: addition homopolymer of a single monomer, …

Go through each named polymer, recall whether it is a homopolymer or copolymer, and name/draw the structure …

• Forgetting Neoprene is a homopolymer of chloroprene alone, not a copolymer.
• Writing terephthalic acid's substitution pattern incorrectly (it is the 1,4- / para-dicarboxylic acid of benzene) …