Sunday, 16 December 2018

Nylon

Nylon is a material invented by Wallace Carothers in Dupont Corporation, USA. Carother is the main director of research centre and he was a chemistry student who specialized in polymers, that are molecules composed of long chains of atoms. Nylon is a strong but fine synthetic fibre, is was patented in 1935 and mass produced in 1939. It's applicated for stockings, toothbrushes, parachutes, fishing lines and surgical thread.
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Task 4.1

A. He B. His C. His D. It E. His F. Them G. They H. This

  • Page 17. Exercise 2
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