3. Answer ALL parts (a), (b), (c) and (d). (a) How would you prepare a branched chain, linear low density polyethene in a one-reactor solution-phase process using ethene and 1-octene as your comonomer feedstocks? [30%] 30% for a valid approach. (b) Identify catalyst(s) and their required characteristics. Identify the key challenges in providing control over the degree of branching within individual polymer molecules (chains). [30%] 20% for catalyst(s) explaining their particular role. 10% for discussion of controlling branching. (C) How would you determine the degree of branching? [10%] (d) Consider the catalyst(s) you prepared in parts (a) and (b). How would you determine the tacticity of the polymer that would result from using this catalyst system to polymerise propene? What tacticity would you expect? How does this compare to the tacticity of the (cheapest) commercial polypropenes? [30%] 10% for each part