Addition polymerization – common plastics produced by chain-growth mechanism The method of addition (chain-growth) polymerization is used to obtain which of the following plastics?

Introduction / Context:Plastics used in building services, packaging, and consumer goods are formed by different polymerization routes. Distinguishing addition (chain-growth) from condensation (step-growth) polymerization helps predict properties, processing, and recycling behavior. This question asks which common plastics are produced via the addition mechanism.

Given Data / Assumptions:

• Addition polymerization involves unsaturated monomers forming chains without losing small molecules.
• Monomers include ethylene, propylene, vinyl chloride, and styrene.
• We pick all that fit the chain-growth route.

Concept / Approach:

Polyethylene, polypropylene, polyvinyl chloride, and polystyrene are all produced by addition polymerization. In each case, double-bond-containing monomers (or vinyl monomers) undergo initiation, propagation, and termination to form long chains. No small by-product (like water or HCl from the reaction itself) is eliminated during chain growth; PVC contains chlorine in the monomer structure but is still polymerized additively.

Step-by-Step Solution:

Verification / Alternative check:

Polymer science references classify PE, PP, PVC, and PS as chain-growth polymers, in contrast to condensation polymers like polyesters, polyamides, and phenol-formaldehyde resins.

Why Other Options Are Wrong:

Each individual option names a plastic correctly produced by addition polymerization; hence only the combined choice covers them all.

Common Pitfalls:

Assuming PVC is condensation because of chlorine presence; confusing chain-growth with step-growth mechanisms; overlooking catalyst roles (e.g., Ziegler–Natta) that still operate via addition pathways.

Final Answer:

All of these