Which of the following fibres is an example of a semi-synthetic polymer?
Rayon
The correct answer is Rayon.
Revision Table: Polymer Classifications Term Definition Example (Fibre) Polymer Large molecule made of repeating units (monomers) N/A Semi-synthetic polymer Chemically modified natural polymer Rayon Synthetic polymer Man-made from monomers Nylon, Polyester Additional Information on Rayon and Semi-synthetic Fibres Rayon was one of the earliest man-made fibres and was initially developed as an artificial silk. Different processes like the viscose process, cuproammonium process, and saponification of cellulose acetate yield different types of rayon (viscose rayon, cuprammonium rayon, saponified cellulose acetate). Cellulose acetate is another important semi-synthetic polymer fibre, often used in textiles and cigarette filters, which is derived from cellulose by reacting it with acetic anhydride.
Important Questions from Classification of Materials
- Based on the crystalline grain and shape, quantum dots are :
- Carbon nano tubes (CNT) are _____ times stronger than steel.
- Which of the following fibres are obtained from plant leaf.
(i) Pina
(ii) Sisal
(iii) Kapok
(iv) Coir
Code : - Assertion (A) : While washing woollen garments kneading and squeezing method is used.
Reason (R) : Scaly structure of wool cause felting due to friction.
Code : - Assertion (A) : Terry Towel is the most absorbant fabric structure
Reason (R) : It is a cut pile hence more surface area to absorb water.
Code :
