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23-Chem-B8 Polymer Engineering: May 2017

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Non-Newtonian Viscosity of a CMC Solution from Capillary Data
  2. Question 2 Living Anionic Polymerization — Chain Lengths and Poisson Kinetics
  3. Question 3 Molecular-Weight Averages and Variance from Fractionation
  4. Question 4 Design Procedure for an Inverted-L Calender (PVC Film)
  5. Question 5 Injection of a Power-Law Melt into a Runner
  6. Question 6 Control of Copolymer Composition in a Semi-Batch Reactor

Start with Question 1 →

Paper format: Open-book, 3 hours; six numbered problems of equal value (20 points each), of which five constitute a complete paper (only the first five in the answer book are marked). All six problems are solved below so the set is complete for study.

Reference texts: Odian, Principles of Polymerization (4th ed., Wiley) — chain-growth & living/anionic kinetics, molecular-weight distributions; Rudin & Choi, The Elements of Polymer Science and Engineering (3rd ed., Academic Press) — dilute-solution rheology, MWD averages, capillary viscometry; Tadmor & Gogos, Principles of Polymer Processing (2nd ed., Wiley) — calendering, injection filling, die flow; Sperling, Introduction to Physical Polymer Science (4th ed., Wiley) — viscoelasticity; Young & Lovell, Introduction to Polymers (3rd ed.) — polyolefin processing; Middleman, Fundamentals of Polymer Processing — power-law tube/runner flow.