Question 1: Answer all the sections below:

a- What is the difference between a thermoset polymer and a thermoplastic polymer?

b- Define Melt temperature (Tm) and Glass transition temperature (Tg) ?

c- Describe why the Tg values determined for poly(methyl methacrylate) and poly(n-butyl methacrylate) are +100 C and +20C, respectively?

d- Define Isotactic structure and why it leads to produced high crystallinity and density?

Question 2:

a- Explain, with more details, gel permeation chromatography (GPC) analytical technique?

b- Calculate the number average (Mn), weigh average (Mw) and polydispersity index (PDI) if you have, 10 chains of 10,000 g mol-1, 20 chains of 20,000 g mol-1, 10 chains of 30,000 g mol-1?

c- Calculate the degree of polymerisation (Dp) of a polystyrene chain with an Mn of 10,000?

Question 3: Comparing between Emulsion, Suspension and Dispersion Polymerisations?

Question 4: Explain, with more details, the polymerisation of styrene using emulsion polymerisation technique?