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Some physical characteristics of double‐networked natural rubber
Author(s) -
Kaang Shinyoung,
Gong Donghwa,
Nah Changwoon
Publication year - 1997
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(19970801)65:5<917::aid-app9>3.0.co;2-q
Subject(s) - natural rubber , ultimate tensile strength , toughness , materials science , composite material , elongation , modulus , swelling , creep , residual , extension (predicate logic) , mathematics , computer science , algorithm , programming language
Abstract A double‐networked natural rubber (DNNR) was prepared by a “two‐step crosslinking” method, in which the crosslinking was achieved while the natural rubber was in a stretched condition. The swelling behavior, tensile properties, creep, recovery, and permanent set were investigated. Generally, the observed mechanical properties of DNNR, such as the Young's modulus, tensile strength, toughness, creep, recovery, and permanent set, were considerably improved as the residual extension was increased. They were, however, rather inferior to those of a single‐networked natural rubber and showed a minimum at a lower residual extension of about 1.55. The degree of crosslinking and elongation at break were not greatly affected by the residual extension. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:917–924, 1997