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Substitution Reactions on Halogenated Polyethylene

  • Ian R. Harrison
  • Jacqueline S. Butler
  • J. P. Runt
Part of the Polymer Science and Technology book series

Abstract

It has been previously demonstrated that halogenation of polyethylene single crystals can be selective. Bromination takes place primarily in the amorphous regions without destruction of the crystalline core. These substituted crystals show unique melting and annealing behavior. Given that a Br substituent has such a marked effect on properties it was of interest to examine the effects of a much larger substituent. This was accomplished by replacing Br with a toluene group via a Friedel Crafts reaction. Neutron activation analysis, FTIR and thermal analysis were used to examine the reaction products. These techniques show that Br had indeed been replaced by toluene. Further substitution is primarily in the 1,4 (para) position with some 1,3 (meta) substitution. The presence of bulky sub-stituents modifies the melting behavior of the lamellae. However the heat of fusion remains unchanged. The major effect on the melting process is the suppression of any reorganizational annealing behavior.

Keywords

Neutron Activation Analysis Substitution Reaction Bromine Content Melting Data FTIR Absorbance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Ian R. Harrison
    • 1
  • Jacqueline S. Butler
    • 1
  • J. P. Runt
    • 1
  1. 1.Polymer Science Section, Material Science & Engineering DepartmentThe Pennsylvania State UniversityUniversity ParkUSA

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