Multiblock copolymers having improved mechanical properties

Chemistry: natural resins or derivatives; peptides or proteins; – Peptides of 3 to 100 amino acid residues

Reexamination Certificate

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Reexamination Certificate

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07417112

ABSTRACT:
Replacement of the amorphous peptide domain of a structural biopolymer, such as silk from silkworms or spiders, with a nonpeptide segment while maintaining the β-sheet forming crystalline segments provides synthetic multiblock copolymers having solid-state structures and mechanical properties similar to the naturally occurring structural biopolymer is described herein. Such synthetic multiblock copolymers may be produced as films or fibers.

REFERENCES:
Hinman, M.B., Jones, J.A. and Lewis, R.V. “Synthetic Spider Silk: A Modular Fiber”,Tibtech, 18:374-5 (2000).
Liivak, O., Blye, A., Shah, N. and Jelinski, L.W. “A Microfabricated Wet-Spinning Apparatus to Spin Fibers of Silk Proteins: Structure—Property Correlations”,Macromolecules, 31(9):2947-51 (1998).
Minoura, N., Tsukada, M., and Nagura, M. “Physico-chemical Properties of Silk Fibroin Membrane as a Biomaterial”,Biomaterials, 11:430-4 (1990).
Rathore, O. and Sogah, D.Y. “Self-Assembly of β-Sheets into Nanostructures by Poly(alanine) Segments Incorporated in Multiblock Copolymers Inspired by Spider Silk”,J Am Chem Soc, 123:5231-9 (2001).
Seidel, A., Liivak, O., Calve, S., Adaska, J., Ji, G., Yang, Z., Grubb, D., Zax, D.B. and Jelinski, L.W. “Regenerated Spider Silk: Processing, Properties, and Structure”,Macromolecules, 33:775-80 (2000).
Winningham, M.J. and Sogah, D.Y. “A Modular Approach to Polymer Architecture Control via Catenation of Prefabricated Biomolecular Segments: Polymers Containing Parallel β-Sheets Templated by a Phenoxathiin-Based Reverse Turn Mimic”,Macromolecules, 30(4):862-76 (1997).

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