Polymers

Solubility of sulphate decreases down.

Nylon 6, Nylon 6, 6 & Bakelite are condensation polymers.

Novolac is a linear polymer obtained from phenol and formaldehyde by condensation reaction.
[Structure of Novolac polymer]

Polyamide copolymers are biodegradable polymers.
Polymers Nylon-2 Nylon-6 are polyamides and monomers of Nylon-2 nylon-6 are:
H? N–CH? –COOH (Glycine) & H? N– (CH? )? –COOH (Aminocaproic acid)

Caprolactum is monomer of nylon-6

Isoprene is polymer of natural rubber

2 – chloro-1,3-butadiene or chloroprene is the polymer of neoprene which is a synthetic rubber

Acrylonitrite is one of the monomer of Buna-N

Acrylonitrile

S -> styrene

Buta-1, 3-diene     Styrene

Buna-S required nascent oxygen

Butadiene + styrene $\underset{}{\overset{\left[0\right]}{\to }}$ (Buna-S)