polyymer chemistry and engineering

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2. Consider the polymerization of methyl methacrylate to produce PMMA. Given the data below, use a spreadsheet to make the following plots: A. Conversion vs, time (hr.) for T=50C,60C, and 70C when [I]o=1 phr. Also calculate maximum conversion for each case. B. Conversion vs. time (hr.) for [I]o=1phr,0.25phr, and 0.1 phr when T=50C. Also calculate maximum conversion for each case. C. Average degree of polymerization vs. time for [1]o=1phr,0.25phr, and 0.1phr when T=50C Data: - Monomer is methyl methacrylate (M.W. 100.12g/mol, density 0.943g/mL ) - Initiator is 2,4-Dichlorobenzoyl peroxide (M.W. 380g/mol) - Assume density is constant with temperature - Assume f=0.5 - =1.58 - Use activation energies to calculate kp and kt at various temperatures 2 Methyl methacrylate - Density =0.943g/mL - M.W. 100.12g/mol - 5=1.58 - ke=515L/molsec(at60C),Ea=26,400J/mol - ki2.55107Lmolsec( at 60C ). Fa 11,900J/mol - use activation energies to calculate ks and k at various temperatures. 2.4-Dichlorobenzoyl peroxide - M.W. =380g/mol - Assume f=0.5 - Obtain ks from nomograph Calculations: Fxamnla of numarinal matte ifor 6 non 1 whol. Graphical results: Methyl Methacrylate, 2,4-dichlorobenzoyl peroxide (a) 1phr Methyl Methacrylate, 2,4-dichlorobenzoyl peroxide, 50C