Revisiting the Anionic Polymerization of Methyl Ethacrylate

Justin G. Kennemur, Frank S. Bates, Marc A. Hillmyer

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Synthesis of poly(methyl ethacrylate), (PMEA), in tetrahydrofuran at −78 °C using anionic polymerization techniques results in high molar mass (>30 kg mol−1), low dispersity (1.3), and high conversion (>81%). The molar masses of a series of samples are consistent with values anticipated by the monomer-to-initiator ratio and conversion. These results represent a significant improvement to earlier reported attempts to prepare PMEA using anionic methods. Successful diblock polymerization of polystyrene-block-PMEA, (PS-PMEA), and poly(4-tert-butylstyrene)-block-PMEA, (PtBS-PMEA), is achieved through sequential anionic polymerization techniques with dispersities as low as 1.06 and segment molar fractions close to those targeted. Broad principal scattering peaks observed by small-angle X-ray scattering (SAXS) for symmetric PS-PMEA at relatively high molar mass (39 kg mol−1) suggests an effective interaction parameter (χeff) that is smaller than for PS-block-poly(methyl methacrylate). On the other hand, PtBS-PMEA block polymers form a well-ordered morphology based on SAXS measurements and is attributable to the more hydrophobic PtBS segment. These results confirm the viability of PMEA as a new constituent in the expanding suite of polymers suitable for preparing nanostructured block polymers.

Original languageEnglish (US)
Article number1700282
JournalMacromolecular Chemistry and Physics
Volume219
Issue number1
DOIs
StatePublished - Jan 5 2018

Fingerprint

Anionic polymerization
Molar mass
polymerization
Polystyrenes
X ray scattering
Block copolymers
polystyrene
polymers
scattering
Polymethyl Methacrylate
initiators
tetrahydrofuran
Polymethyl methacrylates
viability
polymethyl methacrylate
Polymers
x rays
monomers
Monomers
Polymerization

Keywords

  • anionic polymerization
  • block polymer
  • methyl ethacrylate
  • α-alkyl acrylate

Cite this

Revisiting the Anionic Polymerization of Methyl Ethacrylate. / Kennemur, Justin G.; Bates, Frank S.; Hillmyer, Marc A.

In: Macromolecular Chemistry and Physics, Vol. 219, No. 1, 1700282, 05.01.2018.

Research output: Contribution to journalArticle

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