Q5 (a) Figure 6 shows two types of polymeric products fabricated using different processing techniques. Suggest with justification for the type of processes used to produce the products: i. Product A ii. Product B A 00 Figure 6. Two types of polymeric products (a) plastic bottles and (b) plastic car

Elements Of Electromagnetics
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Q5 (a)
Figure 6 shows two types of polymeric products fabricated using different
processing techniques.
Suggest with justification for the type of processes used to produce the products:
i.
Product A
ii.
Product B
A
B
Figure 6. Two types of polymeric products (a) plastic bottles and (b) plastic car
boot tray
(b)
The molecular weight data of a Polymer X are given in Table 3. Once undergone
a melting process, it achieves degree of polymerization, DP of 498 upon
solidification.
i.
Calculate the number-average molecular weight (Mn) for the polymer.
ii.
Calculate the molecular weight for monomers of the Polymer X.
iii.
Prove that the Polymer X is a polytetrafluoroethylene (PTFE) with
chemical formula of (C2F4)n-
Given the atomic weights for carbon, C is 12.011 g/mol and fluorine, F is
18.998 g/mol.
Transcribed Image Text:Q5 (a) Figure 6 shows two types of polymeric products fabricated using different processing techniques. Suggest with justification for the type of processes used to produce the products: i. Product A ii. Product B A B Figure 6. Two types of polymeric products (a) plastic bottles and (b) plastic car boot tray (b) The molecular weight data of a Polymer X are given in Table 3. Once undergone a melting process, it achieves degree of polymerization, DP of 498 upon solidification. i. Calculate the number-average molecular weight (Mn) for the polymer. ii. Calculate the molecular weight for monomers of the Polymer X. iii. Prove that the Polymer X is a polytetrafluoroethylene (PTFE) with chemical formula of (C2F4)n- Given the atomic weights for carbon, C is 12.011 g/mol and fluorine, F is 18.998 g/mol.
Table 3. Molecular weight data of Polymer X
Molecular weight range
Number fraction (x¡)
Weight fraction (w¿)
(g/mol)
10,000 – 20,000
0.03
0.01
20,000 – 30,000
0.09
0.04
30,000 – 40,000
0.15
0.11
40,000 – 50,000
0.25
0.23
50,000
60,000
0.22
0.24
60,000 – 70,000
0.14
0.18
70,000 – 80,000
0.08
0.12
80, 000 – 90,000
0.04
0.07
(c)
Figure 7 shows skateboards produced from two different type of composite
materials categorized as natural and synthetic polymer matrix composites. The
deck of skateboard A is made from wood meanwhile deck of skateboard B is made
out of carbon fiber reinforced polymer composite.
i.
Describe a suitable manufacturing process to produce the skateboard deck
using continuous carbon fiber reinforced polymer composite.
ii.
Select with justification for a more sustainable material to produce the
skateboard deck between the wood composites or carbon reinforced
polymer composites.
(a)
ESPEEREA
(b)
Figure 7. (a) Wood type skateboard; (b) Carbon fibre composite type skate-board deck design
Transcribed Image Text:Table 3. Molecular weight data of Polymer X Molecular weight range Number fraction (x¡) Weight fraction (w¿) (g/mol) 10,000 – 20,000 0.03 0.01 20,000 – 30,000 0.09 0.04 30,000 – 40,000 0.15 0.11 40,000 – 50,000 0.25 0.23 50,000 60,000 0.22 0.24 60,000 – 70,000 0.14 0.18 70,000 – 80,000 0.08 0.12 80, 000 – 90,000 0.04 0.07 (c) Figure 7 shows skateboards produced from two different type of composite materials categorized as natural and synthetic polymer matrix composites. The deck of skateboard A is made from wood meanwhile deck of skateboard B is made out of carbon fiber reinforced polymer composite. i. Describe a suitable manufacturing process to produce the skateboard deck using continuous carbon fiber reinforced polymer composite. ii. Select with justification for a more sustainable material to produce the skateboard deck between the wood composites or carbon reinforced polymer composites. (a) ESPEEREA (b) Figure 7. (a) Wood type skateboard; (b) Carbon fibre composite type skate-board deck design
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