A synthetic fibre "X" is chemically a polyamide whereas the synthetic fibre "Y" contains a large number of ester groups. Another natural fibre "Z" is made of a polymer "Q" which consists of a number of glucose units joined one after the other.
(a) Name the polymer Y and Z.
(b) Which fibre contains the same type of groups as those in a PET jar?
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Answers
Explanation:
(i) terylene could be the synthetic fibre B which contains a large number of ester groups.
(ii) Rayon could be the synthetic fibre C which is made of polymer D containing glucose.
(iii) Nylon could be the fibre A which is chemically a polyamide is nylon. It is the first fully synthetic fibre. It was prepared from coal, water and air.
(b) Polymer D is Cellulose. A polymer is made of many repeating units. Polymers also occur in nature. For example, cotton is a natural polymer which is made from the cellulose. Cellulose is made up of a large number of glucose units.
(c) Fibre C is prepared from a natural raw material. Fibre C is Rayon. Rayon is obtained by the chemical treatment of wood pulp or cellulose. It is the man-made fibre which is regarded as artificial silk.
(d) The fibre B which is terylene contains the same type of groups as those in a PET jar. Terylene and PET are both polyesters.