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Chain Reaction Sequences - Polymerization Kinetic Chain Length (KCL) is a key variable in all chain reaction sequences KCL = average number of closed propagation cycles achieved for each initiated reactive intermediate.

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chain reaction sequences polymerization
Chain Reaction Sequences - Polymerization
  • Kinetic Chain Length (KCL) is a key variable in all chain reaction sequences
    • KCL = average number of closed propagation cycles achieved for each initiated reactive intermediate.
      • Values range from 1 (only one transformation realized before termination occurs) to infinity, but numbers in the 5-100 range are typical.
  • Consider our acrylate polymerization case study. What defines the instantaneous kinetic chain length of this process?
chain reaction sequences oxidation
Chain Reaction Sequences – Oxidation
  • Vast quantities of phenol and acetone are produced from benzene, propylene, and air, as follows.
  • You should be able to write the mechanisms for each process.
    • Can you use your mechanisms to derive design rate expressions?
food for thought design project 2
Food for Thought… Design Project #2
  • Derive expressions for the rate of cumene consumption, oxygen consumption, and cumene hydroperoxide production as a function of measurable process variables.
  • Today we will examine the open initiation and termination sequences of the chain process.