Name the fibre which is insoluble in boiling sodium hydroxide: (1) Acrilon (2) Orion (3) Dacron (4) Nylon
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3)Drcron
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The fibre which is insoluble in boiling Sodium hydroxide is Dacron.
- Dacron is a kind of synthetic fibre and one of the most recognizable brands of Polyester by DuPont, an American fibre manufacturer.
- This Polymer is chemically known as Polyethylene terephthalate(PET).
- It is a thermoplastic polymer and commonly knowns as Terylene
- The manufacturing of dacron involves a polycondensation reaction between pure terephthalic acid and mono ethylene glycol.
- Water and excess ethylene glycol are removed during this process by distillation at high temperatures.
- Dacron is thus insoluble in water and boiling hydroxide whereas other synthetic fibres mentioned here are soluble in water.
- This fibre possesses good UV stability , high tear resistance, no water absorption, is lightweight and resistant to attack from insects, fungi and certain chemicals.
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