Anna University Polymer Testing Methods Test Paper

Anna University Polymer Testing Methods Test Paper

POLYMER TECHNOLOGY

Time: 3hrs                                                                                          Max Marks: 100

Answer ALL Questions

PART – A (10 x 2 = 20 marks)

1.Name the methods used to determine Tg of polymers.

2.How is melt flow index of polymer determined?

3.How is water absorption behaviour of plastics determined? Mention its usefulness characteristics of plastics?

4.What is called ‘Limiting oxygen index’? How is it useful to predict flammability characteristics of plastics?

5.Give the sample specimen size for (i) Tensile strength (ii) Dielectric strength measurements.

6.How is thermal expansion coefficients of plastics measured? Mention its importance.

7.How is arc resistance of plastics determined? Mention its significance.

8.What is ‘permanent set’? How is it determined?

9.How is ‘haze’ behaviour of film determined?

10.How is flexural strength of plastics specimen determined?

 

PART – B (5 x 16 = 80 marks)

Question 11 is compulsory

 

11.How are following properties of plastics specimen determined?

(i)Glass transition temperature using differential scanning calorimeter.

(ii)Weather resistance using Atlas-Weather-Ometer                                     (16)

 

12.a)Discuss the measurement and importance of the following tests.

(i)Heat distortion temperature and (ii) Gloss measurements.

 

(OR)

b)How are the following tests carried out? Mention their usefulness.

(i)Ageing test and (ii) Dielectric constant.

 

13.a)Describe the stress relaxation test and its usefulness.

 

(OR)

b)Discuss the viscosity measurement using Mooney viscometer

 

14.a)Discuss the importance of Monsanto Processibility Tester.

 

(OR)

 

b)How are following tests carried out? Mention their importance.

(i)Tear resistance and (ii) Abrasion resistance.

 

15.a)How is fracture toughness of plastics specimen determined? Mention its usefulness.

 

(OR)

 b) Describe the determination of thermal stability of polymers. Mention the importance of thermal stability analysis.

 

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