GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Product Design Concept: Structures & Additives
Time: 10:30 AM TO 01:00 PM
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Subject Code: 2173607
Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019Subject Name: Product Design Concept: Structures & Additives
Time: 10:30 AM TO 01:00 PM
Instructions:
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1. Attempt all questions.2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
| Q.1 (a) | Define PDI with its Significance. | 03 |
| Q.1 (b) | Give the classification of molecular weight determination techniques. | 04 |
| Q.1 (c) | Explain various effects of processing parameters on the structure of polymeric material. | 07 |
| Q.2 (a) | Which technique is available for Tg measurement? Explain in detail. | 03 |
| Q.2 (b) | Give the structural features of polymeric materials. | 04 |
| Q.2 (c) | What is the Tg of PET? Explain effect of Tg on the properties of polymer. OR --- Content provided by FirstRanker.com --- What do you mean by chain Flexibility? Explain its effect on structure of polymers. | 07 |
| Q.3 (a) | Define functionality and Functionality group equivalent. | 03 |
| Q.3 (b) | What do you mean by Spherullite structure? Explain with diagram. | 04 |
| Q.3 (c) | Explain viscometry method with the help of mark-Houwink equation. OR How additives will affect the structure and properties of polymers? | 07 |
| Q.4 (a) | Describe the effect of molecular weight on properties of polyolefin. | 03 |
| Q.4 (b) | Suggest any additives which will enhance the plasticity of material and explain its properties as well as applications. | 04 |
| Q.4 (c) | What do you mean by crystallisability? What are the factors that effect on it? | 07 |
| Q.5 (a) | Explain End Group Analysis method for molecular weight determination. | 03 |
| Q.5 (b) | Give the list of different techniques used for number average molecular weight determination and explain in detail about GPC. | 04 |
| Q.5 (c) | Enlist different chemical methods used for polymer identification. OR Explain polymer degradation along with its types. | 07 |
| Q.6 (a) | Write a short note on cryoscopy method. | 03 |
| Q.6 (b) | Explain basic principle of Ebullioscopy. | 04 |
| Q.6 (c) | Explain Gradient Elution technique. | 07 |
| Q.7 (a) | What do you mean by SEM? Explain its details with the help of neat diagram. | 03 |
| Q.7 (b) | Write down the principle behind ultracentrifugation technique. | 04 |
| Q.7 (c) | List out various techniques available for flexible film for food applications. --- Content provided by FirstRanker.com --- ORExplain adhesion peel test in detail. | 07 |
| Q.8 (a) | Write down the details of vapour pressure osmometry. | 03 |
Date: 26/11/2019
Total Marks: 70
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