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Journal Article

Solid-state morphologies of linear and bottlebrush-shaped polystyrene-poly(Z-L-lysine) block copolymers

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Schlaad,  H.
Helmut Schlaad, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Kukula,  H.
Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Smarsly,  B. M.
Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Antonietti,  M.
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Pakula,  Tadeusz
MPI for Polymer Research, Max Planck Society;

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Citation

Schlaad, H., Kukula, H., Smarsly, B. M., Antonietti, M., & Pakula, T. (2002). Solid-state morphologies of linear and bottlebrush-shaped polystyrene-poly(Z-L-lysine) block copolymers. Polymer, 43(19), 5321-5328. doi:10.1016/S0032-3861(02)00360-9.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-6529-6
Abstract
The solid-state structures of polystyrene -poly(Z-L-lysine) block copolymers were examined with respect to the polymer architecture and the secondary structure of the polypeptide using circular dichroism, quantitative small- and wide-angle X- ray scattering, and electron microscopy. Linear block copolymers exhibit a hexagonal-in-lamellar structure where folded and packed polypeptide alpha-helices form lamellae which extend over an exceptional broad range of the composition diagram. Star- or bottlebrush-shaped copolymers are able to stabilize a larger interface area than linear ones which promotes the formation of undulated lamellar mesophases. Depending on the secondary structure of polypeptide segments, plane lamellar, superundulated lamellar, or corrugated lamellar phases are formed. These results indicate the importance of a secondary structure and packing of polymer chains for the formation of new phases and ordering far from the 'classical' phase behavior. (C) 2002 Elsevier Science Ltd. All rights reserved.