No abstract

The major differences between the spectra of these two polymers are due to the greatly increased concentration of piperazine rings in the poly(ethyleneamines). The piperazine rings are supported by absorptions at 935 cm-1, 1010 cm-1, 1160 cm-1, and 1340 cm-1. An estimation of their concentration is made possible by ratioing the absorption of the 1010 cm-1 ring mode band to the -NH2 absorption at 1605 cm-1. As previously stated, the absorptivities of these two bands and a knowledge of the primary amine content of the polymer are requisites for quantitative analysis. The infrared analysis indicated a piperazine ring concentration of 27% in the poly-(ethyleneamine) product shown in Figure 2.

No abstract

No abstract

No abstract