“…The decomposition process could also be followed by attenuated total reflectioninfrared spectroscopy (ATR-IR) by observation of the disappearance of the distinctive C=N=N stretch of the starting diazo function. 36 Thus, neat diphenyl 1a and dimethoxy 1b exhibit stretches at 2034 and 2029 cm -1 , respectively, whilst diazofluorene 2 has two peaks at 2054 and 2084 cm -1 , and these clearly decreased during the curing process (Table 1, This study provided evidence for thermal or photo-initiated collapse of the diazo function at the polymer surface at rates consistent with the known reactivity of carbenes; [37][38][39][40] of interest now was an understanding of the nature of the polymer on the surface modification reaction, and to achieve this, a comparative study of reactions with PS beads, along with the low surface energy materials, medium density polyethylene (MDPE), low density polyethylene (LDPE) and ultra-high molecular weight polyethylene (UHMWPE) using 4,4'-(diazomethylene)bis(N,N-dimethylaniline)…”