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Characterization and gel point of randomly linked high cis‐polybutadiene networks
Author(s) -
PyckhoutHintzen W.,
Müller B.,
Springer T.
Publication year - 1993
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.19930760118
Subject(s) - polybutadiene , modulus , plateau (mathematics) , swelling , gel point , materials science , stress relaxation , relaxation (psychology) , quantum entanglement , stress (linguistics) , characterization (materials science) , composite material , ultimate tensile strength , polymer chemistry , thermodynamics , mathematics , polymer , physics , nanotechnology , copolymer , mathematical analysis , quantum mechanics , psychology , social psychology , linguistics , creep , philosophy , quantum
Cis—Polybutadiene networks (98% cis), crosslinked in the bulk state by gamma irradiation were characterized in terms of their mechanical properties. Data from stress‐strain analyses, swelling degrees, stress relaxation and random—linking theory are in accordance and the estimated gel points practically coincide. Trapped entanglements contributed up to 30% to the network modulus, from which also the plateau modulus was determined. The tensile data were obtained from Mooney—Rivlin representations. It was concluded that the assumption of additive contributions from chemical and entanglement crosslink densities in the Langley theory works well in the range of doses investigated here. A comparison with a tube—like approach of these networks is made.