Physical Properties of Dendritic Macromolecules: A Study of Glass Transition Temperature

K. L. Wooley, C. J. Hawker, J. M. Pochan, Jean Frechet*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

295 Scopus citations

Abstract

The variation of glass transition temperature with molecular weight and chain-end composition for dendritic polyethers and polyesters was studied. A new and modified version of the chain-end free volume theory was derived to account for the large number of chain ends in these unusual structures. For both homopolymers and a variety of novel block copolymers, the experimental variation in Tg with molecular weight was found to correlate well with theoretical predictions, thus demonstrating the wide applicability of the chain-end free volume theory. The glass transition was found to be greatly affected by the nature of the chain ends and internal monomer units.

Original languageEnglish (US)
Pages (from-to)1514-1519
Number of pages6
JournalMacromolecules
Volume26
Issue number7
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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