In general, FTIR spectrum could provide the information of hydrogen bonds between polybenzoxazine (PBA-a) and polycaprolactone (PCL).
21,23
There are two regions of interest to be observed. i.e., 176021690 cm
21
(carbonyl groups) and 371022790 cm
21
(hydroxyl groups) as presented in Figures 2 and 3, respectively. All spectra of these two figures were normal-