The structural and mechanical properties of polysulfide-based polyurea

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 a...

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Bibliographic Details
Published in:Polymer international 2003-12, Vol.52 (12), p.1925-1929
Main Authors: Dong, Wenzhao, Quan, Yiwu, Zhang, Junsheng, Chen, Qingmin
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
polysulfide
polyurea
Properties and characterization
structure
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Summary: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
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.1301