A review. Chain-dynamics of flexible synthetic macromols. in the cryst. state has been clarified by multinuclear solid-state NMR observations. Massive motional phenomena are shown when chains are crystd. in the hexagonal phase. Several examples have been surveyed, where motion is induced by high temp. and pressure or favored by inclusion of moderate amts. of comonomer units in the main chain and by the use of monomers contg. mobile side chains. Also, motional phenomena of fast spinning and large librations of the macromols. are promoted when the isolated chains are confined to nanochannels formed in hexagonal crystal structures of suitable matrixes. The motional behavior can be modulated by the topol. and the interactions in the unusual environments. This knowledge provides information about polymers in close contact with heterogeneous interfaces, such as polymers in nanocomposites or at surfaces.

Sozzani, P., Bracco, S., Comotti, A., Simonutti, R. (2005). Motional phase disorder of polymer chains as crystallized to hexagonal lattices. In G. Allegra (a cura di), Advances in Polymer Science - Interphases and Mesophases in Polymer Crystallization II (pp. 153-177). Springer-Verlag [10.1007/b107180].

Motional phase disorder of polymer chains as crystallized to hexagonal lattices

SOZZANI, PIERO ERNESTO;BRACCO, SILVIA;COMOTTI, ANGIOLINA;SIMONUTTI, ROBERTO
2005

Abstract

A review. Chain-dynamics of flexible synthetic macromols. in the cryst. state has been clarified by multinuclear solid-state NMR observations. Massive motional phenomena are shown when chains are crystd. in the hexagonal phase. Several examples have been surveyed, where motion is induced by high temp. and pressure or favored by inclusion of moderate amts. of comonomer units in the main chain and by the use of monomers contg. mobile side chains. Also, motional phenomena of fast spinning and large librations of the macromols. are promoted when the isolated chains are confined to nanochannels formed in hexagonal crystal structures of suitable matrixes. The motional behavior can be modulated by the topol. and the interactions in the unusual environments. This knowledge provides information about polymers in close contact with heterogeneous interfaces, such as polymers in nanocomposites or at surfaces.
Capitolo o saggio
polymer chain dynamics, hexagonal phase, motional phenomena, inclusion of polymer,disorder
English
Advances in Polymer Science - Interphases and Mesophases in Polymer Crystallization II
Allegra, G
2005
3-540-25344-0
181
Springer-Verlag
153
177
Sozzani, P., Bracco, S., Comotti, A., Simonutti, R. (2005). Motional phase disorder of polymer chains as crystallized to hexagonal lattices. In G. Allegra (a cura di), Advances in Polymer Science - Interphases and Mesophases in Polymer Crystallization II (pp. 153-177). Springer-Verlag [10.1007/b107180].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/25338
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