Carrier‐bound platinum and iron compounds with carcinostatic properties

Electrospun Silica—Polybenzimidazole Nanocomposite Fibers

“…The weight average molecular weight of PBI prepared by melt condensation ($\overline M _{\rm w}$ = 27.200 g · mol −1 ) was found to be higher than that of PBI prepared by solution polycondensation ($\overline M _{\rm w}$ = 7.100 g · mol −1 ). This is in accordance with reports on higher end group reactivity in the melt 14…”

Soluble Polybenzimidazoles for PEM: Synthesized from Efficient, Inexpensive, Readily Accessible Alternative Tetraamine Monomer

“…The T g of PBI polymers are generally very high and varies from 350 to 450 °C depending on the backbone structure. 2,3,42 The T g obtained in this study for all Py-PBI polymers also fall in this range (Table 3 and Figure 4) attributing that these are high T g polymers. Generally the para connected PBI displays lower T g than the meta PBI.…”

“…The T g of PBI polymers are generally very high and varies from 350 to 450 °C depending on the backbone structure. ,, The T g obtained in this study for all Py-PBI polymers also fall in this range (Table and Figure ) attributing that these are high T g polymers. Generally the para connected PBI displays lower T g than the meta PBI. , The T g values differ from polymer to polymer depending on the DCA structure used for making the Py-PBI. The T g of the TPA polymer (397 °C, obtained from tan δ) is lowest among all the polymers.…”

“…The E′ values of all the Py-PBI polymers are comparable with the literature value of PBI. 2,3,40,42 The E′ decreases with increasing temperature in all cases indicates that mechanical property becomes poorer at higher temperature. However, the change is not very significant proves the fact that these Py-PBIs have good mechanical strength even at very high temperature.…”

How the monomer concentration of polymerization influences various properties of polybenzimidazole: A case study with poly(4,4′‐diphenylether‐5,5′‐bibenzimidazole)

“…A higher value of IV indicates a higher molecular weight of the polymer 39. The quantification of the PBI molecular weight by the measurement of IV in H 2 SO 4 has been demonstrated in the literature extensively 16, 38. Figure 1 shows that IV increased with the initial monomer concentration increasing up to 4%, and then IV saturated and finally dropped at a very high initial monomer concentration (5.5%).…”