Effect of temperature and solvent on polymer tacticity in the free-radical polymerization of styrene and methyl methacrylate

Leesa M. Smith, Michelle L. Coote

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The effect of temperature and solvent on polymer tacticity in free-radical polymerization of styrene and methyl methacrylate was studied by 13C and 1H NMR, respectively. Polystyrene shows a mild syndiotactic tendency (Pm = 0.36 ± 0.02) that is independent of temperature over a wide range (-10 to 120°C), while poly(methyl methacrylate) shows a stronger syndiotactic tendency (Pm = 0.17 ± 0.01 at 30°C) that decreases as temperature is increased (Pm = 0.22 ± 0.02 at 80°C). None of the polymerization solvents studied (bulk, THF, DMF, DMSO, acetonitrile, and acetone) had a significant effect on polymer tacticity in either system. The triad fractions of both polymers showed deviations from the Bernoulli model, implying that the antepenultimate unit affects the propagation reaction.

Original languageEnglish
Pages (from-to)3351-3358
Number of pages8
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume51
Issue number16
DOIs
Publication statusPublished - 15 Aug 2013
Externally publishedYes

Keywords

  • poly(methyl methacrylate)
  • polystyrene
  • radical polymerization
  • solvent effects
  • syndiotactic
  • tacticity

Fingerprint

Dive into the research topics of 'Effect of temperature and solvent on polymer tacticity in the free-radical polymerization of styrene and methyl methacrylate'. Together they form a unique fingerprint.

Cite this