Question

Identify cross linked polymer from following.

• A. High density polythene
• B. Low density polythene
• C. Melamine
• D. PVC

Hint:

Common cross-linked polymers include Bakelite, Melamine, and Vulcanized rubber.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
We need to identify the polymer that has a three-dimensional network structure formed by cross-links between polymer chains.
Step 2: Detailed Explanation:
1. High density polythene (HDPE): It is a linear polymer with some minor branching, making it dense and rigid, but it is not cross-linked.
2. Low density polythene (LDPE): It is a highly branched polymer, but the chains are not chemically cross-linked to each other.
3. Melamine: Melamine-formaldehyde resin is a thermosetting polymer. It forms a complex three-dimensional network structure during polymerization, making it a cross-linked polymer.
4. PVC (Polyvinyl Chloride): It is a linear polymer.
Step 4: Final Answer:
Melamine is a cross-linked (network) polymer.