Question: Poly(methyl methacrylate) (PMMA) is a viscoelastic polymer with elastic modulus at varied temperature shown in Figure 1. Using the time-temperature superposition principle, construct a master

Poly(methyl methacrylate) (PMMA) is a viscoelastic polymer with elastic modulus at

Poly(methyl methacrylate) (PMMA) is a viscoelastic polymer with elastic modulus at varied temperature shown in Figure 1. Using the time-temperature superposition principle, construct a master curve of logE versus log t (either using excel or manually on graph paper) that consider the PMMA behavior at temperatures A to I. Then, calculate the shift factor a using the reference temperature is Tg then the universal values for the two constants in the WLF equations are C1= 17.44 and C2=51.6C (60 marks) Figure 1 Poly(methyl methacrylate) (PMMA) is a viscoelastic polymer with elastic modulus at varied temperature shown in Figure 1. Using the time-temperature superposition principle, construct a master curve of logE versus log t (either using excel or manually on graph paper) that consider the PMMA behavior at temperatures A to I. Then, calculate the shift factor a using the reference temperature is Tg then the universal values for the two constants in the WLF equations are C1= 17.44 and C2=51.6C (60 marks) Figure 1

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