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Nuclear reaction analysis: A study on the interface formation in polymer mixtures below the critical point
Author(s) -
Steiner U.,
Chaturvedi U. K.,
Zak O.,
Krausch G.,
Schatz G.,
Klein J.
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910450128
Subject(s) - polymer , deuterium , diffusion , critical point (mathematics) , materials science , full width at half maximum , nuclear reaction analysis , resolution (logic) , chemical physics , thermodynamics , molecular physics , analytical chemistry (journal) , polymer chemistry , chemistry , physics , atomic physics , hydrogen , composite material , geometry , chromatography , organic chemistry , optoelectronics , mathematics , artificial intelligence , computer science
We describe a method for directly determining the composition profile of deuterated polymer chains in polymer mixtures. Our technique, nuclear reaction analysis, is based on the 2 H( 3 He, 4 He) 1 H nuclear reaction. By detecting 4 He in a forward geometry, we achieve a spatial resolution of 14 nm (FWHM). We use this technique to probe the broadening of the interface between two partially miscible polymers. We found that such a system attains a finite interfacial width in equilibrium. For short times, we monitor the dynamics of interface formation. We found that the interfacial width increases significantly slower than in the case of free diffusion.