Which of the following are the low molecular weight substances added to polymers to increase plasticity and flexibility?
Show Hint
- Fillers
- Plasticizers
- Inoculants
- Stabilisers
The Correct Option is B
Solution and Explanation
Plasticizers are low molecular weight, often organic compounds, added to polymers to: - Reduce intermolecular forces between polymer chains, - Increase flexibility and workability, - Lower the glass transition temperature (\( T_g \)). Step 2: Mechanism of Action
- By embedding between polymer chains, plasticizers reduce stiffness. - Common in PVC, rubber, and cellulose-based plastics. Step 3: Elimination of Other Options
- Fillers: Used to increase bulk or mechanical strength, not flexibility.
- Inoculants: Used in metallurgy (e.g., cast iron), not polymers.
- Stabilisers: Protect polymers from thermal or UV degradation. Conclusion: To enhance the flexibility and plasticity of polymers, plasticizers are added.
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