@article{Gabbas_Ahmad_Zainuddin_Ibrahim_2021, title={Synthesis, characterization and thermal polymerization of new 3,4-dihydro-2H-1,3-naphthoxazine monomers}, volume={62}, url={https://ichp.vot.pl/index.php/p/article/view/274}, DOI={10.14314/polimery.2017.086}, abstractNote={<p>Two new 1,3-naphthoxazine monomers (M-A and M-B) were synthesized via a modified stepwise procedure in which methylene bromide was used for the ring-closure reaction. Condensation of 2-hydroxy-1-naphthaldehyde with 1,6-hexamethylenediamine or 1,4-phenylenediamine gives imine compounds, which were converted to 2-hydroxynaphthylamines by reduction with NaBH<sub>4</sub> in methanol. Ring-closure reaction between the 2-hydroxynaphthylamines and methylene bromide results in the formation of 1,3-naphthoxazine monomers M-A or M-B with good yields. The structures of the synthesized monomers were confirmed using different spectroscopic techniques (including FT-IR, <sup>1</sup>H NMR and <sup>13</sup>C NMR), mass spectrometry, and elemental analysis. Thermal polymerization of the monomers was investigated by FT-IR and differential scanning calorimetry (DSC). Both the 1,3-naphthoxazine monomers undergo ring-opening polymerization, leading to the formation of the corresponding polynaphthoxazines [P(M-A) and P(M-B)]. The thermal stability of the polynaphthoxazines was thereafter studied by thermogravimetric analysis (TGA).</p>}, number={2}, journal={Polimery}, author={Gabbas, A. U. G. and Ahmad, M. B. H. and Zainuddin, N. and Ibrahim, N. A.}, year={2021}, month={Jan.}, pages={86-92} }