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1. Crazing Mechanism and Physical Aging of Poly(lactide) Toughened with Poly(ethylene oxide)- block -poly(butylene oxide) Diblock Copolymers

   https://doi.org/10.1021/acs.macromol.0c01759  

   McCutcheon, Charles J. ; Zhao, Boran ; Jin, Kailong ; Bates, Frank S. ; Ellison, Christopher J. ( November 2020 , Macromolecules)
2. Effects of temperature on chaotropic anion-induced shape transitions of star molecular bottlebrushes with heterografted poly(ethylene oxide) and poly( N , N -dialkylaminoethyl methacrylate) side chains in acidic water

   https://doi.org/10.1039/D1SM00728A  

   Lewoczko, Evan M. ; Kelly, Michael T. ; Kent, Ethan W. ; Zhao, Bin ( July 2021 , Soft Matter)

   This article reports a study of the effects of temperature on chaotropic anion (CA)-induced star-globule shape transitions in acidic water of three-arm star bottlebrushes composed of heterografted poly(ethylene oxide) (PEO) and either poly(2-( N , N -dimethylamino)ethyl methacrylate) (PDMAEMA) or poly(2-( N , N -diethylamino)ethyl methacrylate) (PDEAEMA) (the brushes denoted as SMB-11 and -22, respectively). The brush polymers were synthesized by grafting alkyne-end-functionalized PEO and PDMAEMA or PDEAEMA onto an azide-bearing three-arm star backbone polymer using the copper( i )-catalyzed alkyne-azide cycloaddition reaction. Six anions were studied for their effects on the conformations of SMB-11 and -22 in acidic water: super CAs [Fe(CN) 6 ] 3− and [Fe(CN)6] 4− , moderate CAs PF 6 − and ClO 4 − , weak CA I − , and for comparison, kosmotropic anion SO 4 2− . At 25 °C, the addition of super and moderate CAs induced shape transitions of SMB-11 and -22 in pH 4.50 water from a starlike to a collapsed globular state stabilized by PEO side chains, which was driven by the ion pairing of protonated tertiary amine groups with CAs and the chaotropic effect. The shape changes occurred at much lower salt concentrations for super CAs than moderatemore »CAs. Upon heating from near room temperature to 70 °C, the super CA-collapsed brushes remained in the globular state, whereas the moderate CA-collapsed brushes underwent reversible globule-to-star shape transitions. The transition temperature increased with increasing salt concentration and was found to be higher for SMB-22 at the same salt concentration, presumably caused by the chaotropic effect. In contrast, I − and SO 4 2− had small effects on the conformations of SMB-11 and -22 at 25 °C in the studied salt concentration range, and only small and gradual size variations were observed upon heating to 70 °C. The results reported here may have potential uses in the design of stimuli-responsive systems for substance encapsulation and release.« less
3. Macromolecular Engineering and Additive Manufacturing of Polyisobutylene‐Based Thermoplastic Elastomers. II. The Poly(styrene‐ b ‐isobutylene‐ b ‐styrene)/Poly(phenylene oxide) System

   https://doi.org/10.1002/marc.202200109  

   Shen, Naifu ; Bu, Jinyu ; Prévôt, Marianne E. ; Hegmann, Torsten ; Kennedy, Joseph P. ; Xu, Weinan ( April 2022 , Macromolecular Rapid Communications)
4. Effect of Added Salt on Disordered Poly(ethylene oxide)- Block -Poly(methyl methacrylate) Copolymer Electrolytes

   https://doi.org/10.1021/acs.macromol.0c02493  

   Shah, Neel J. ; Dadashi-Silab, Sajjad ; Galluzzo, Michael D. ; Chakraborty, Saheli ; Loo, Whitney S. ; Matyjaszewski, Krzysztof ; Balsara, Nitash P. ( February 2021 , Macromolecules)
5. Poly(cyclohexylethylene)- block -poly(ethylene oxide) Block Polymers for Metal Oxide Templating

   https://doi.org/10.1021/acsmacrolett.5b00458  

   Schulze, Morgan W. ; Sinturel, Christophe ; Hillmyer, Marc A. ( September 2015 , ACS Macro Letters)