Synthesis, Characterization, and Gas Permeation Properties

Figure 3. FTIR spectra of 1, 2c, and 3c.
Table 1. Degree of Substitution and Molecular Weight of Polymers
1, 2a–c, and 3a–c
polymer DStotal Mn c Mw c Mw/Mn c
1 2.69 a 71 000 237 000 3.3
2a ≈ 3.00 b 222 000 750 000 3.4
2b ≈ 3.00 b 225 000 677 000 3.0
2c ≈ 3.00 b 226 000 739 000 3.3
3a ≈ 3.00 b – d – d – d
3b ≈ 3.00 b – d – d – d
3c ≈ 3.00 b – d – d – d
95
Chapter 3
a Determined by 1 H NMR. b Determined by elemental analysis. c Determined by
GPC (0.01 M LiBr in DMF as eluent). d Could not be determined.
observed to be 71 000 and 3.3, respectively, while those of 2a were 222 000 and 3.4.