On the morphological behavior of ABC miktoarm stars containing poly(cis 1,4‐isoprene), poly(styrene), and poly(2‐vinylpyridine)
| Autor: | Sokol Ndoni, Kristoffer Almdal, Jyoti P. Mahalik, Bobby G. Sumpter, Gregory S. Smith, Thomas P. Russell, Sergey Chernyy, Matthias M. L. Arras, Jacob J. K. Kirkensgaard, Lars Schulte, Hyeyoung Kim, Kell Mortensen, Rajeev Kumar |
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| Rok vydání: | 2018 |
| Předmět: |
2-Vinylpyridine
Materials science Polymers and Plastics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Styrene chemistry.chemical_compound Stars chemistry Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry 0210 nano-technology Isoprene |
| Zdroj: | Chernyy, S, Mahalik, J P, Kumar, R, Kirkensgaard, J J K, Arras, M M L, Kim, H, Schulte, L, Ndoni, S, Smith, G S, Mortensen, K, Sumpter, B G, Russell, T P & Almdal, K 2018, ' On the Morphological Behavior of ABC Miktoarm Stars Containing Poly(cis 1,4-isoprene), Poly(styrene), and Poly(2-vinylpyridine) ', Journal of Polymer Science. Part B, Polymer Physics, vol. 56, no. 22, pp. 1491-1504 . https://doi.org/10.1002/polb.24733 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.24733 |
| Popis: | Fundamental understanding of microphase separation in ABC miktoarm copolymers is vital to access a plethora of nonconventional morphologies. Miktoarm stars based on poly(cis 1,4-isoprene) (I), poly(styrene) (S), and poly(2-vinylpyridine) (V) are model systems, which allow systematic studies of the effects of composition, chemical microstructure, and temperature on the thermodynamics of microphase separation. Eleven ISV-x (I:S:V = 1:1:x, v:v:v) miktoarm copolymers were synthesized by anionic polymerization affording well-defined copolymers with a variable V arm. Equilibrium bulk morphologies of all samples, as evidenced by smallangle X-ray scattering, transmission electron microscopy (TEM), and self-consistent field theory, showed a systematic transition from lamellae (x ≈ 0–0.2) to [8.8.4] tiling (x ≈ 0.6–0.9) to cylinders inundulating lamellae (x ≈ 2–4) and, finally, to hexagonally packed core–shell cylinders (x ≈ 5–8). Chemical microstructure of the I arm [poly(cis 1,4-isoprene)] versus poly(3,4-isoprene) is shown to play important role in affecting morphological behavior. To reconcile differences between ISV-x star morphologies reported in the literature and those reported herein, even for the same composition, effects of the microstructure of I arm on the Flory–Huggins parameter between I and V arms were taken into account in a qualitative manner. |
| Databáze: | OpenAIRE |
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