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Network Density and Diene Conversion in Peroxide‐Cured Gumstock EPDM Rubbers. A Solid‐State NMR Study
Author(s) -
Orza Ramona A.,
Magusin Pieter C.M.M.,
Litvinov Victor M.,
van Duin Martin,
Michels M.A.J.
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551153
Subject(s) - relaxometry , peroxide , materials science , magic angle spinning , epdm rubber , polymer chemistry , double bond , solid state nuclear magnetic resonance , organic peroxide , chemical shift , ethylene propylene rubber , diene , nuclear magnetic resonance spectroscopy , natural rubber , chemical engineering , composite material , organic chemistry , chemistry , nuclear magnetic resonance , polymer , copolymer , medicine , physics , spin echo , magnetic resonance imaging , engineering , radiology
Peroxide‐cross‐linked EPM and EPDM rubbers have been investigated with magic‐angle spinning 1 H NMR spectroscopy and static 1 H NMR relaxometry. The results yield a consistent nanoscale picture of the chemical and physical network properties in terms of chemical cross‐links formed via macro‐radical combination, chemical cross‐links formed via addition to the double bonds, and physical cross‐links resulting from chain entanglements.