“Orion” (commonly “Orlon”) fibre identification: which statement correctly describes it?
Chemical Engineering
Polymer Technology
Difficulty: Easy
Choose an option
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AIt is a copolymer.
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BIt is a condensation polymer.
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CIt is obtained by polymerising vinyl cyanide (acrylonitrile).
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DAll (a), (b) and (c).
Answer
Correct Answer: It is obtained by polymerising vinyl cyanide (acrylonitrile).
Explanation
Introduction / Context:“Orlon” is a trade name historically used for acrylic fibres based on polyacrylonitrile (PAN). The key recognition is the monomer identity and mechanism (addition chain-growth), not condensation.
Given Data / Assumptions:
- Monomer: acrylonitrile (vinyl cyanide).
- PAN can be homopolymer or copolymer with small comonomer amounts, but the classic description is polymerised vinyl cyanide.
Concept / Approach:Distinguish between chain-growth (vinyl) and condensation (step-growth). Acrylonitrile undergoes addition polymerisation to PAN; thus, the correct choice singles out polymerising vinyl cyanide.
Final Answer:It is obtained by polymerising vinyl cyanide (acrylonitrile).