Post polymer modification of polyethylenimine with citrate esters: Selectivity and hydrophobicity

Justine Waggel, Robert T. Mathers

Research output: Contribution to journalArticle

7 Scopus citations


Citrate esters selectively react with primary (1°) amines on branched polyethylenimine (PEI). As the functionalization occurred, the water soluble PEI transformed into a thermoset. Adjusting stoichiometry and type of citrate ester allowed fine-tuning of hydrophobicity, modulus, and swelling behavior. Based on control experiments of citrate esters with model amines, FTIR analysis of thermosets, swelling experiments, and TGA data, molecular models were constructed to represent the thermosets. Quantifying the hydrophobicity of these molecular models with computational octanol-water (logPoct) partition coefficients provided a method to assess how hydrophobicity changes during a post polymer modification (PPM) reaction.

Original languageEnglish (US)
Pages (from-to)62884-62889
Number of pages6
JournalRSC Advances
Issue number67
StatePublished - Jan 1 2016


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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