Influence of double hydrogen bonds and alkyl chains on the gelation of nonchiral polyurethane model compounds: sheets, eaves trough, tubes and oriented fibers.

@article{Khanna2009InfluenceOD,
  title={Influence of double hydrogen bonds and alkyl chains on the gelation of nonchiral polyurethane model compounds: sheets, eaves trough, tubes and oriented fibers.},
  author={Shalini Khanna and Mostofa Kamal Khan and Pudupadi R Sundararajan},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2009},
  volume={25 22},
  pages={
          13183-93
        }
}
We describe the gelation, upon self-assembly of a series of nonchiral molecules, resulting in tubular morphology of the fibers. These are biscarbamates, which are model compounds for polyurethanes with two hydrogen bonding groups separated by a (CH(2))(6) spacer and symmetrically substituted with alkyl chains on either side varying in length from C(6) to C(18). Upon gelation, these molecules form a sheet initially. The sheets then tend to wrap, leading to tubules. Those with partial wrapping… CONTINUE READING
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