PG – 511

*PG511*

I Semester M.Sc. Degree Examination, February 2013 (Semester) (N.S.) (2011–12 Scheme) HOME SCIENCE (Textiles & Clothing Specialisation) HSTC 101 : Textile Chemistry Time : 3 Hours

Max. Marks : 80

Instruction : All Sections are compulsory. SECTION – A I. Answer any five questions. Each carries 3 marks.

(5×3=15)

1) State the types of polymerisation process. 2) What is Mercerisation ? 3) What is weighing of silk ? 4) Mention the importance of blending. 5) What is C.I. constitution and CI generic number ? 6) List the red listed chemicals. 7) Define HSHM fibre. SECTION – B II. Answer any seven questions. Each carries 5 marks.

(7×5=35)

8) Briefly explain various types of producing Bi-component fibre. 9) List problems related with U.V. exposure. Mention the steps involved in U.V. protection finish. 10) Describe the importance of thickening agents in printing. 11) What are Mordants ? How it is used ? 12) How poly urethane fibre is produced ? P.T.O.

*PG511*

PG – 511 13) Illustrate one repeating unit for a wool fibre molecules. 14) Describe the process involved in stem fibre production. 15) Describe the effect of acid and alkali on cotton fibre.

16) Discuss on importance of various properties involved in polymer to form fibre. SECTION – C III. Answer any two questions. Each carries 15 marks.

(2×15=30)

17) Describe the importance of natural dyes and explain the application of natural dyes on silk. 18) Explain the processing and production of Nylon 6.6. 19) What are mechanical finishes ? Explain any 2 special finishes done on silk fabrics. ——————