Thermal properties of hyperbranched polyesters

Adina Dumitrascu, Abhijit Sarkar, Jianfang Chai, Tracy Zhang, Robert A. Bubeck, Bob A. Howell, Patrick B. Smith

Research output: Contribution to journalArticle

Abstract

Hyperbranched poly(ester)s (HBPE) possess attributes for applications in a number of areas which include platforms for controlled release of actives and as rheology modifiers and coalescent agents in coatings. For the latter applications, properties such as the glass transition temperature and thermal stability are important. A number of HBPEs were produced with varying composition, molecular weight, degree of branching and end-group functionality in order to determine the effect of each on the HBPE thermal and rheological properties. These materials were synthesized from trimethylolpropane and the difunctional acids; adipic, phthalic and terephthalic. The chemical structure of the resulting HBPEs was fully characterized, particularly by SEC and NMR, and the thermal properties by DSC and TG. The glass transition temperature was found to depend primarily on HBPE composition and end-group functionality. The prominent feature of the thermal degradation for the hydroxyl-capped HBPE was dehydrative ether formation while that for carboxyl-capped polymers was decarboxylation.

LanguageEnglish (US)
Pages1-8
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
DOIs
StateAccepted/In press - Apr 28 2017

Profile

Polyesters
polyesters
esters
Esters
Thermodynamic properties
thermodynamic properties
glass transition temperature
decarboxylation
thermal degradation
Chemical analysis
Rheology
rheology
Hydroxyl Radical
Ether
molecular weight
ethers
Polymers
Pyrolysis
Thermodynamic stability
thermal stability

Keywords

  • Decarboxylation
  • Dehydrative ether formation
  • DSC
  • Glass transition
  • Hyperbranched polymer
  • Poly(ester) degradation
  • Rheology
  • Thermogravimetry

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Thermal properties of hyperbranched polyesters. / Dumitrascu, Adina; Sarkar, Abhijit; Chai, Jianfang; Zhang, Tracy; Bubeck, Robert A.; Howell, Bob A.; Smith, Patrick B.

In: Journal of Thermal Analysis and Calorimetry, 28.04.2017, p. 1-8.

Research output: Contribution to journalArticle

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