Abstract
This work aims at probing the formation of hydrogen bonds in the blends of polybenzoxazines and additional hydrogen-bond donor moieties-containing compounds. Based on experimental study and computer simulations, we found that the dominant hydrogen bonds of p-cresol-aniline-based dimer (pC-a-D) and polybenzoxazines (PpC-a) were OH⋯N while N,N′-(pyridine-2,6-diyl)diacetamide (DAA) was NH⋯OC hydrogen bond. After blending pC-a-D or PpC-a with DAA, additional hydrogen bonds formed, i.e., OH⋯OC and OH⋯NH. Moreover, the total quantity of hydrogen bonds of the blends increased. These results suggested that hydrogen bonds formed between polybenzoxazines and the additional hydrogen-bond donor moieties-containing polymers or compounds, and furthermore would be desirable to foster the promoted performance. This novel insight about polybenzoxazine blends is anticipated to help researchers explore more blends of polybenzoxazines with excellent properties.
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