Question

Find thermosetting plastic from the following :
A. Melamine
B. PVC
C. Polythene
D. Nylon

Answer 1

Solution :-

The correct answer of this question is option (A), Melamine. Melamine is an example of thermosetting plastic. All the other three are example of thermoplastic.

Thermosetting plastic -

Thermosetting plastic, typically processed by reaction injection molding, contains polymers that combine together during the curing process to form a permanent chemical bond. This process forms weak bonds between the monomer chains within these materials and eliminates the risk of the product remelting when heat is applied, making thermosetting plastic ideal for high-heat appliances. Thermosetting plastic greatly improve the material's mechanical properties, providing enhanced chemical resistance, heat resistance and structural integrity. Thermosetting plastics are frequently used for sealed products due to their resistance to deformation and are also among some of the most impact resistant plastics available.

Answer 2

The answer is Option A.

Among the given items, melamine is an example of thermosetting plastic. When melamine is treated with formaldehyde and some other agents, it produces melamine resins. These resins are essentially thermosetting plastics of high durability and used in making high pressure laminated coatings and decorative laminates such as formica, dry erase boards dinnerware and laminate flooring.