Preparation and characterization of reprocessable poly(1,2,3-triazolium)

Poly(1,2,3-triazolium) (PTAM) is a dynamic reversible crosslinking polymer based on 1,2,3-triazolium. Structural rearrangement of PTAM can occur through dynamic exchange reactions of 1,2,3-triazolium. But there are not any applications derived from the dynamic reversible crosslinking properties of 1,2,3-triazolium. In the paper, to expand the function and application of PTAM, a reprocessable PTAM resin has been prepared and the reprocess ability is studied in detail. PTAM can achieve complete stress relaxation within 2 min at 160 degrees C through the exchange reaction of dynamically reversible crosslinked 1,2,3-triazolium. Under the condition of 160 degrees C and 10 MPa pressure, PTAM can achieve mechanical properties recovery after 2 h of reprocessing. The recovery rate of tensile strength can reach 94.2%. After four consecutive cycles reprocessing, the recovery rate of tensile strength is maintained at about 90%. And the thermal stability of PTAM is unchanged. PTAM has a possible application in the recycling of thermoset-based plastics and composites. The result provides a reference for the functional application and development of dynamic reversible crosslinking polymers. We studied the reprocessable poly(1,2,3-triazolium) (PTAM) based on the dynamic reversible crosslinking 1,2,3-triazolium. PTAM could achieve stress relaxation within 2 min at 160 degrees C. And PTAM could be reprocessed. After four consecutive reprocessing, the recovery rate of tensile strength was still maintained at about 90%. image