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Solid‐state NMR studies of relaxations in modified duroplastic low‐stress materials
Author(s) -
Domke W.D.,
Halmheu F.,
Schneider S.
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070540109
Subject(s) - materials science , epoxy , polymer , siloxane , solid state nuclear magnetic resonance , stress (linguistics) , spin diffusion , relaxation (psychology) , polymer chemistry , diffusion , stress relaxation , solid state , composite material , polymer science , chemistry , nuclear magnetic resonance , thermodynamics , creep , physics , psychology , social psychology , linguistics , philosophy
Abstract Duroplastic low‐stress molding materials, based on epoxy novolak resins with different siloxane modifications have been investigated with respect to the mobility of different structural elements and the morphology of the resulting polymers. Different solid‐state NMR relaxation experiments have been used to probe the mobility in a wide range of motional frequencies. Spin diffusion experiments allowed the estimation of domain sizes even in the case of highly filled polymers and indicate that the effect of low‐stress modification is correlated with microphase separation. © 1994 John Wiley & Sons, Inc.