Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- MALDI-TOF Analysis of Halogen Telechelic Poly(methyl methacrylate)s and Poly(methyl acrylate)s Prepared by Atom Transfer Radical Polymerization (ATRP) or Single Electron Transfer-Living Radical Polymerization (SET-LRP)
Justine Couthouis, Helmut Keul and Martin Möller
Article first published online: 27 JUL 2015 | DOI: 10.1002/macp.201500144
Poly(methyl methacrylate) and poly(methyl acrylate) samples are prepared by atom transfer radical polymerization or single electron transfer-living radical polymerization using methyl dichloroacetate (MDCA) and ethyl dibromoacetate (EDBA) as bifunctional initiators. Characteristics of the polymers are determined by GPC and NMR analyses; particular attention is paid to the end group functionality estimated by MALDI-TOF mass spectrometry.
- Improved Synthesis of Oligomeric Sulfone-Based Phthalonitriles
Matthew Laskoski, Teddy M. Keller, Holly L. Ricks-Laskoski, Carl B. Giller and Judson Hervey
Article first published online: 27 JUL 2015 | DOI: 10.1002/macp.201500198
An improved method for the synthesis of oligomeric sulfonyl-containing phthalonitriles with excellent processability has been developed. This phthalonitrile resin exhibits lower viscosities relative to previously reported systems and after thermal curing to yield crosslinked polymers, this sulfonyl-based polymer demonstrates superb mechanical properties and thermo-oxidative stability, absorbs less than 1.0 weight percent water, and maintains good dielectric properties.
- Polylactide-Based Nanoparticles with Tailor-Made Functionalization
Veronika Beer, Kaloian Koynov, Werner Steffen, Katharina Landfester and Anna Musyanovych
Article first published online: 21 JUL 2015 | DOI: 10.1002/macp.201500153
The synthesis of carboxyl and fluorescent functionalized poly(lactic acid)-based nanoparticles through copolymerization between vinyl-terminated oligolactic acid and functional comonomer is reported. The resulting nanoparticles with a diameter average of 90 nm have an increased carboxyl group density on their surface for enhanced stability in the salt solutions and carry a fluorescent dye for monitoring in the imaging experiments.
- Novel Access to Propagation Rate Coefficients of Radical Polymerization by the SP–PLP–EPR Method
Hendrik Kattner, Patrick Drawe and Michael Buback
Article first published online: 21 JUL 2015 | DOI: 10.1002/macp.201500191
Time-resolved EPR measurement of radical concentration after instantaneous pulsed-laser-induced production enables analysis of propagation and termination kinetics for slowly terminating macroradicals. The reliability of the so-obtained data is checked by additional NIR experiments.
- High-Performance Segmented Liquid Crystalline Copolyesters
Ashley M. Nelson, Gregory B. Fahs, Robert B. Moore and Timothy E. Long
Article first published online: 21 JUL 2015 | DOI: 10.1002/macp.201500181
One-pot melt transesterification affords a novel series of Pluronic-containing segmented liquid crystalline copolyesters. Systematically changing the methylene spacer and soft segment oligoether elucidates structure–property–morphology relationships for tailoring to high-performance applications.