Heterogeneity of the chain segment dynamics and ordering in lamellar layers of a symmetric triblock copolymer

Autor:	B. Deloche, P. Auroy, C. Lorthioir, Y. Gallot
Rok vydání:	2003
Předmět:	Deuterium NMR Materials science Chemical physics Chain segment Copolymer Solid-state General Physics and Astronomy Sequence (biology) Lamellar structure Single crystal
Zdroj:	Europhysics Letters (EPL). 62:746-752
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i2003-00436-6
Popis:	The segmental ordering within the sublayers of a lamellar polystyrene-poly dimethylsiloxane-polystyrene triblock (PS-PDMS-PS) is examined by NMR. The carbon and deuterium NMR line shapes of the PDMS sequence (soft block) reveal clearly a wide distribution of segmental orientational order S in the lamellae and thus a distribution of constraints probed by the chains. It is observed that this distribution is mainly due to the coexistence of positive and negative S, resulting from a competitive ordering effect induced by the presence of glassy interfaces (S 0).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7a0f2efee5d0f5ac9c4ff3630f0cd8e https://doi.org/10.1209/epl/i2003-00436-6 Zobrazit plný text záznamu