Abstract
In this work, a novel self-healing system based on the use of polybenzoxazine precursor (PBP) as a healing additive is presented. PBP (M n = 2300 g/mol, Mw/Mn = 2.6) is facilely synthesized in a reasonable yield by Mannich type polycondensation of bisphenol A, 1,6-diaminohexane with paraformaldehyde. The additive PBP faintly undergoes a thermal ring-opening reaction when contained in polysulfone (PSU) films. Thermal treatment at 160 C enables PBP to chemically bind to PSU chains and form networks through the Friedel-Crafts reaction, demonstrating a novel self-healing behavior. The extent of the recovery was studied using a stress-elongation (%) test and found to be 55%. Thermal properties of the polybenzoxazine precursor and the healed sample were investigated.
Original language | English |
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Pages (from-to) | 8773-8778 |
Number of pages | 6 |
Journal | Macromolecules |
Volume | 46 |
Issue number | 22 |
DOIs | |
Publication status | Published - 26 Nov 2013 |