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Structure and mechanical properties of nitrile rubbers modified with iodine
Author(s) -
Bieliński Dariusz M.,
Ślusarski Ludomir,
Włochowicz Andrzej,
Ślusarczyk Czeław
Publication year - 1998
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/(sici)1097-4628(19980118)67:3<501::aid-app13>3.0.co;2-y
Subject(s) - crystallinity , acrylonitrile , nitrile , nitrile rubber , materials science , polymer chemistry , monomer , macromolecule , polymer science , iodine , polymer , chemical engineering , chemistry , composite material , natural rubber , organic chemistry , copolymer , biochemistry , engineering , metallurgy
Nitrile rubbers, both common and hydrogenated, revealed some kind of ordering, as detected by WAXS. Strain‐induced crystallization is responsible for the enhanced degree of crystallinity for HNBR. In the case of NBR, another mechanism has been proposed, namely specific interactions between carbon‐carbon double bonds from butadiene and cyano groups from acrylonitrile monomer units, leading to an EDA complex formation. Iodination reduces the degree of crystallinity of both materials; however, their stiffness increases as the result of modification, probably due to dipole‐dipole interactions or hindering effects accompanying introduction of “large” iodine atoms into the macromolecular structure. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67: 501–512, 1998