Upon a closer examination of the melting points listed in Table 2, some exceptions to the general rule of thumb can be noticed. In spite of their lower amide bond density, PA 610 and PA 612 exhibit a higher melting point than do the more polar PA 69. The same is observed when PA 49...
42 Thus, the crude aldehyde mixtures from lignin oxidation could be turned into a mixture of benzyl alcohols upon a simple hydrogenation step, and subsequently produce a mixture of functionalized bisphenols upon coupling with phenol. Based on our earlier investigations,64 our assumption was that the...
a thermal destabilizing effect on the polyurethane system. This behavior confirms the formation of the urea hard segments, which are relatively thermally less stable compared to the urethane segments. The low molar mass diamines, i.e. BAE and BAP have a strong influence on mechanical properties...