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

• Published in: Journal of applied polymer science 2024-07, Vol.141 (26), p.n/a
• Main Authors: Zhang, Jun, Lv, Shuaikang, Tang, Junkun, Liu, Zuozhen, Huang, Farong
• Format: Article
• Language: English
• Subjects: Crosslinking; Mechanical properties; recycling; Reprocessing; resins; Stress relaxation; Tensile strength; Thermal stability
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.55578

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°C through the exchange reaction of dynamically reversible crosslinked 1,2,3‐triazolium. Under the condition of 160°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°C. And PTAM could be reprocessed. After four consecutive reprocessing, the recovery rate of tensile strength was still maintained at about 90%.