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Chemical Engineering Interviews Questions


Polymer Technology question and answers

Q.1.What is Polymer Technology?

Polymer Technology is the study of polymers, including their synthesis, processing, properties, and applications .

Q.2 What are the primary types of polymers?

The primary types are thermoplastics, thermosetting plastics, and elastomers. .

Q.3 How are polymers typically synthesized?

Answer:Polymers are synthesized through addition (chain-growth) and condensation (step-growth) polymerization processes .


Q.4 What is the glass transition temperature (Tg)?

Tg is the temperature at which a polymer changes from a brittle, glassy state to a flexible, rubbery state.

Q.5 Name a common polymer characterization technique.

Gel Permeation Chromatography (GPC) is used to determine the molecular weight distribution of polymers.


Q.6 What function do plasticizers serve in polymers?

Plasticizers increase the flexibility and workability of polymers by lowering their glass transition temperature (Tg). .

Q.7 Differentiate between addition and condensation polymerization.

Addition polymerization involves monomers with unsaturated bonds and no by-products, while condensation polymerization involves the elimination of small molecules like water.

What is copolymerization?

Temperature is controlled using thermocouples, pyrometers, and control systems that regulate fuel input and air flow.

Q.9 Why are biodegradable polymers important?

They help reduce environmental pollution by decomposing naturally through microbial activity.

Q.10 How does cross-linking affect polymers?

Cross-linking enhances a polymer’s strength, rigidity, and thermal stability by forming covalent bonds between polymer chains.




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