Macromolecular Flexibility and Aggregation Tendency of Non-Cross-Linked and Cross-Linked Cationic Polysoaps

G.J Wang, J.B.F.N. Engberts

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4 Citations (Scopus)

Abstract

The aggregation tendency of non-cross-linked and cross-linked poly(alkylmethyl-diallylammonium halides) bearing n-dodecyl and n-decyl side chains ((CL)-CopolC1-12-Cl, (CL)-CopolC1-12-Br and (CL)-CopolC1-10-Br, respectively) in aqueous solution has been evaluated by measuring their critical aggregate concentration (CAC). Polysoaps (CL)-CopolC1-12-Cl, (CL)-CopolC1-12-Br and (CL)-CopolC1-10-Br all show the same change of their aggregation tendency accompanying an increase in the content of the cross-linking agent. The aggregation tendency of these polysoaps clearly depends upon their macromolecular flexibility that varies inversely with the cross-linking agent content. The decrease of the macromolecular flexibility that results from an increase in the cross-linking agent content leads to an increase in the aggregation tendency which reaches a maximum at 0.20% cross-linking agent content. The propensity for aggregation then decreases with a further decrease of the macromolecular flexibility. Most strikingly, this conclusion is confirmed by the consistency with catalytic effects of these non-cross-linked and cross-linked polysoaps on the unimolecular decarboxylation of 6-nitrobenzisoxazole-3-carboxylate anion (6-NBIC). It is suggested that increased aggregation tendency accompanying decreased macromolecular flexibility for cross-linked polysoaps with a smaller cross-linking agent content should be attributed to an increase of intramolecular micellization.
Original languageEnglish
Pages (from-to)1319 - 1324
Number of pages6
JournalEuropean Polymer Journal
Volume34
Issue number9
DOIs
Publication statusPublished - 1998

Keywords

  • HEXYL SIDE-CHAINS
  • POLY(ALKYLMETHYLDIALLYLAMMONIUM BROMIDES)
  • AQUEOUS-SOLUTIONS
  • CATALYTIC PROPERTIES
  • 6-NITROBENZISOXAZOLE-3-CARBOXYLATE ANION
  • HYDROPHOBIC MICRODOMAINS
  • CONFORMATIONAL STATE
  • FLUORESCENCE
  • SURFACTANT
  • BEHAVIOR

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