Synthesis and properties of thermoreversible crosslinking supramolecular polymer with weak multiple-hydrogen bonds and small chemical network sites from dimer acid, diamine and sulfonyl isocyanate

Thermoreversible crosslinking supramolecular polymers with weak hydrogen bonds were prepared from fatty dimer acids, diamines and sulfonyl isocyanate. The oligomers as backbones of supramolecular polymers have low molecular weights (5–7 repeating units). The hydrogen-bonding networks behave like elastic polymers with high rubber plateaus at high storage modulus, and have low melting temperature that is favoring the low temperature processing. The addition of sulfonyl isocyanate introduces the sulfonyl urethane groups (−O-CO-NH-SO 2 ) that increase the diversity of self-complementary hydrogen bonds. However, the large bulk of sulfonyl groups (O = S = O) prolongs the distance of hydrogen bonds. The supromolecuar polymer with small chemical network sites has higher tensile length and T m between the supromolecular polymers with sulfonyl groups.