Effect of Temperature Variations on Molecular Weight Distributions - Batch, Chain Addition Polymerizations

Abstract

The Maximum Principle was applied to determine the types of temperature variations that minimize and maximize the breadth of the molecular weight distribution (MWD) for chain addition polymerizations in batch reactors. It was found that the variations which minimize the breadth of the MWD keep the instantaneous number average chain length constant. The variations which maximize the breadth of the MWD are step changes in temperature resulting in bimodal distributions. Numerical and experimental examples of such variations are presented. MWDs with minimum and maximum breadths are compared to those that might be formed by temperature variations in real reactors. Under most conditions, temperature variations appear to have a much greater effect on MWD than residence time distributions and micromixing.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
AD0744662

Entities

People

  • Joseph A. Biesenberger
  • Martin E. Sacks
  • Soo-il Lee

Organizations

  • Stevens Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • Alkenes
  • Batch Reactors
  • Chemical Engineering
  • Chemistry
  • Climate Change
  • Continuous Chemical Reactors
  • Dielectric Polymers
  • Explosives Initiators
  • Heat Energy
  • Heat Transfer
  • Molecular Weight
  • Plastic Explosives
  • Plastics
  • Polymers
  • Styrenes
  • Thermal Conductivity

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  • Combustion and Flow Dynamics.
  • Polymer Science and Technology