Writer: Yujie Chen, Wei Wu, Jiawei Wang
Publication: Journal of Polymer Research, 2011,18 (6)：1022-9760
Abstract:Thermo reversible cross-linking supra molecular polymers with weak hydrogen bonds were prepared from fatty dimer acids, diamines and sulfon ylisocyanate. The oligomers as back bones of supra molecular polymer shave low molecular weights (5–7 repeating units). The hydrogen- bonding net -works 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-SO2) 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 Tm between the supromolecular polymers with sulfonyl groups.
