Anna University Textile Chemistry Question Paper

Anna University Textile Chemistry Question Paper

ANNA UNIVERSITY  B.TECH, VI – SEMESTER

CHEMISTRY OF MAN MADE FIBRES

TEXTILE CHEMISTRY

 

Time: 3hrs                                                                                          Max Marks: 100

Answer ALL Questions

PART – A (10 x 2 = 20 marks)

1.Write about the preparation of MEG.

2.Write about the synthesis of caprolactum from toluene.

3.Write moisture content of PET and nylon chips before melt spinning.

4.Write the advantages of TPA route over WMT route in PET polymer preparation.

5.What is TE, EI & PC?

6.What are the polymerisation methods for PAN.

7.Write the various functions of spin finish.

8.Various methods of application of spin finish.

9.What is LOY, POY, HOY & FOY and give the production speeds of the same.

10.What are the different types of differentially dyeable nylon in use.

 

PART B (5 x 16 = 80 marks)

 

11.i)State about the production of DMT.                                                              (5)

 

ii)Produce MEG by acetoxylation process.                                                        (5)

 

iii)How will you get Sodacellulose for he production of Viscose?                    (6)

 

12.a)i)  Explain the production of polyester polymer through DMT route.                (6)

ii)  Explain the spinnability of molten Nylon 6 polymer.                                     (5)

iii)  Elaborate the formation of fibre structure from liquid polymer for viscose   (5)

 

(OR)

12.b)i)  Describe the production of Nylon 66 polymer.                                              (5)

ii)  Mention about the physical fundamentals of the fibres in spinning.              (5)

iii)  Express the mechanics of spinning for synthetic fibres.                                 (6)

 

13.a)i)  Define about melt spinning and state about the equipments for melt spinning.(6)

ii)  Explain the necessity of pre-filtration in melt spinning process.                    (5)

iii)  Elaborate the high speed spinning of one of the polyamide fibres.                (5)

 

(OR)

13.b)i)  State about grid and extruder.

ii)  Give a fibre example for wet spinning and explain its fibre formation.         (6)

iii)  Discuss about Gel spinning.                                                                            (5)

 

14.a)i)  Describe the drawing conditions for Nylon and Polyester filaments.            (5)

ii)  Define texturising and explain the draw texturising process.                         (6)

iii)  Explain the detail steps for the production of polyester staple fibre.             (5)

 

(OR)

14.b)i)  Explain the application of viscose in textile field.                                          (4)

ii)  Describe about Micro fibres.                                                                           (6)

iii)  Elaborate, how will you produce cationic dyeable polyester?                        (6)

 

15.a)i)  State the necessity of Quality Control in textiles.                                          (5)

ii)  Express the parameters in polymer testing.                                                     (5)

iii)  Discuss about the Thermal characteristics of polymers.                                 (6)

 

(OR)

15.b)i)  Describe, how Titanium oxide content is measured in polyester fibre                                                                                                                            (4)

 

ii)  Explain in detail about the measurement of tenacity and elongation modulus in synthetic fibres.                                                                                        (6)

 

iii)  Discuss about the shrinkage force of polyester filament.                               (6)

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