Thermal and photochemical crosslinking of hyperbranched polyphenylene with organic azides.
Here, we report on the first example of crosslinking (CL) hyperbranched polyphenylene (hb-PPh) with a small molecule crosslinker 1,3,5-tris(azidomethyl)benzene (TAMB). It was successfully shown that CL of the hb-PPh/TAMB (9:1) film is possible either thermally or photochemically making use of fundamentally different reaction mechanisms. Starting from a model reaction to prove the feasibility of the thermal CL reaction, we went on to check both the thermal and the photochemical crosslinkability of micrometer thick films. IR spectroscopy was furthermore used to confirm the CL process. Finally, the thin film morphology of the films before and after CL was investigated by AFM, revealing that the surface morphology was unaffected by the CL processes.
Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
Robert
R
Pötzsch
Brigitte
B
Voit
D000480:Alkynes / Q000737:chemistry; D001386:Azides / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D007097:Imines / Q000737:chemistry; D018625:Microscopy, Atomic Force; D010782:Photolysis; D011108:Polymers / Q000737:chemistry*; D013696:Temperature; D014466:Ultraviolet Rays
D000480:Alkynes; D001386:Azides; D003432:Cross-Linking Reagents; D007097:Imines; D011108:Polymers; C017621:phenylnitrene; C041325:polyphenylene sulfide