Synthesis and Properties Investigation of Thiacalix[4]arenes-based Polyurethane Elastomers

In this study, a series of polyurethane elastomers (PUEs) derived from three thiacalix[4]arene derivatives (TC4As), including p-tert-butyl thiacalix[4]arene (p-BTC4A), tetrasodium thiacalix[4]arene tetrasulfonate (TSTC4AS), and thiacalix[4]arene tetrasulfonic acid (TC4AS) as a portion of chain extender in mixture with glycerol were synthesized. The effects of the chemical structure of TC4As on the structural, morphological, thermal and mechanical properties of PUEs were investigated and compared with polyurethane elastomer extended with only glycerol as chain extender. DSC, FTIR spectroscopy, and XRD revealed that the phase separation degree and crystallinity in TC4As-based PUEs was much higher compared with that of the glycerol ones. The TGA results also showed that with incorporation of TC4As in the polyurethane backbone, the thermal stability of PUEs was improved.

کلیدواژه ها:

Polyurethane ، elastomers ، supramolecular structures ، phase separation ، morphology