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  Thermo-induced multistep assembly of double-hydrophilic block copolypeptoids in water

Bogomolova, A., Secker, C., Koetz, J., & Schlaad, H. (2017). Thermo-induced multistep assembly of double-hydrophilic block copolypeptoids in water. Colloid and Polymer Science, 295(8), 1305-1312. doi:10.1007/s00396-017-4044-6.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-2C59-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-9654-4
Genre: Journal Article

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Bogomolova, Anna1, Author
Secker, Christian1, Author              
Koetz, Joachim, Author
Schlaad, Helmut, Author
Affiliations:
1Helmut Schlaad, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863316              

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 Abstract: The aqueous solution behavior of thermoresponsive-hydrophilic block copolypeptoids, i.e., poly(N-(n-propyl)glycine) x -block-poly(N-methylglycine) y (x = 70; y = 23, 42, 76), in the temperature range of 20–45 °C is studied. Turbidimetric analyses of the 0.1 wt% aqueous solutions reveal two cloud points at T cp∼30 and 45 °C and a clearing point in between at T cl∼42 °C. Temperature-dependent dynamic light scattering (DLS) suggest that right above the first collapse temperature, single polymer molecules assemble into large structures which upon further heating, i.e., at the clearing point temperature, disassemble into micelle-like structures. Upon further heating, the aggregates start to grow again in size, as recognized by the second cloud point, through a crystallization process.

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 Dates: 2017-03-062017-08
 Publication Status: Published in print
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 Identifiers: DOI: 10.1007/s00396-017-4044-6
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Title: Colloid and Polymer Science
  Other : Colloid Polym. Sci.
Source Genre: Journal
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Publ. Info: Berlin Heidelberg : Springer-Verlag
Pages: - Volume / Issue: 295 (8) Sequence Number: - Start / End Page: 1305 - 1312 Identifier: ISSN: 0303-402X