GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
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Subject Code:2172308 Date:28/01/2021Subject Name:Speciality Plastics & applications
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define high performance plastics with examples. 03
(b) Write down unique properties of thermotropic LCP. 04
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(c) What do you mean by sterilization? Write down various types of sterilization method in brief. 07Q.2 (a) Write down the properties and applications of polyamides (Nylon 6). 03
(b) Write down the structure, properties and applications of ABS. 04
(c) Write down preparation, properties and applications of PEEK. 07
Q.3 (a) Explain the term antimicrobial additives. Why they are used in medical devices? Give examples of antimicrobial additives. 03
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(b) Define the term bio compatibility. Why it is important in medical device? 04(c) Write down structure, properties and applications of PAL 07
Q.4 (a) What are the requirements of plastics to be used in aerospace applications? 03
(b) What are nano additives? Write down the function of nano additives. 04
(c) Draw the structure, properties and applications of PES. 07
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Q.5 (a) Define conductive filler with examples. 03
(b) Write short notes on joining and welding. 04
(c) Write down preparation, properties and applications of Poly carbonate (PC). 07
Q.6 (a) Write down properties and applications of PVC. 03
(b) Write short notes on radio opaque additives. 04
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(c) Write down the preparation, properties and applications of Polyurethane (PU). 07Q.7 (a) What is the function of stabilizer? Write few examples heat and UV stabilizer. 03
(b) Write a short notes on 1)USP class VI 1) ISO 10993. 04
(c) Write down preparation, properties and applications of Epoxy Resin 07
Q.8 (a) List the names of plastics and its applications in marine industry. 03
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(b) Write down the properties and applications of polychlorotrifluoro ethylene (PCTFE). 04(c) Write down the structure, properties and applications of PPS. 07
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