Short-block polyurea-polydimethylsiloxane block copolymers based on secondary diamines

Short-block polyurea-polydimethylsiloxane block copolymers based on secondary diamines

New short-block polyurea-polydimethylsiloxane block copolymers based on aliphatic and alicyclic secondary diamines and diisocyanates as well as on oligodimethylsiloxanes with glycidyl end groups were synthesized through a two-stage method. With the use of DSC and small-angle X-ray scattering methods...

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Bibliographic Details
Published in:Polymer science. Series B Vol. 55; no. 3-4; pp. 226 - 232
Main Authors: Korigodskii, A. R., Barulina, S. A., Kireev, V. V., Bessonova, N. P., Volkov, V. V., Dembo, K. A., Shtykova, E. V., Vantsyan, M. A., Simakina, E. A.
Format: Journal Article
Language:English
Published: Dordrecht SP MAIK Nauka/Interperiodica 01-03-2013
Subjects:
Aliphatic compounds
Block copolymers
Blocking
Chemistry
Chemistry and Materials Science
Diamines
Differential scanning calorimetry
Diisocyanates
Polymer Sciences
Separation
Stress-strain relationships
Synthesis
Polymer Science Series
Polyurea
Block Copolymer
Rigid Block
PDMS
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Summary:New short-block polyurea-polydimethylsiloxane block copolymers based on aliphatic and alicyclic secondary diamines and diisocyanates as well as on oligodimethylsiloxanes with glycidyl end groups were synthesized through a two-stage method. With the use of DSC and small-angle X-ray scattering methods, it was shown that, in the resulting block copolymers, in spite of the short block lengths, microphase separation occurs. The sizes of the formed domains, which correspond to the interplanar distances, decrease monotonically with a decrease in the sizes of the rigid and elastic blocks and become as low as 6.0–11.1 nm. The stress-strain characteristics of block copolymers are dependent above all on the ratio of blocks.
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ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090413040040