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The structural and mechanical properties of polysulfide‐based polyurea
Author(s) -
Dong Wenzhao,
Quan Yiwu,
Zhang Junsheng,
Chen Qingmin
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1301
Subject(s) - polysulfide , polyurea , molar mass , isophorone diisocyanate , materials science , differential scanning calorimetry , elastomer , ultimate tensile strength , dynamic mechanical analysis , composite material , polymer , chemistry , polyurethane , physics , electrode , electrolyte , thermodynamics
A series of polysulfide‐based polyureas was synthesized, which were based on isophorone diisocyanate (IPDI), liquid polysulfide and 2,5‐diamino‐3,6‐dimethylmercaptotoluene (Ethacure‐300). The structure and mechanical properties of these elastomers were investigated using dynamic mechanical thermal analysis, differential scanning calorimetry, stress–strain analysis, water‐resistance and oil‐resistance tests. The results showed that there was phase segregation between soft and hard segments in polysulfide‐based polyurea. With the increase in number‐average relative molar mass and content of liquid polysulfide, the tensile strength decreased while the ultimate elongation increased. The effect of number‐average relative molar mass of polysulfide and hard‐segment content on oil resistance is also discussed. Copyright © 2003 Society of Chemical Industry