Table 2. Degree of Chain Extension (See Figure 1c) with the Corresponding Epoxide Equivalent Weight in Parentheses and Regioisomeric Distributions (pp:po:oo; See Figure 1a for Structures) for the Epoxy Resins Studied Obtained by Titration and 1H NMR and HPLC and 1H NMR, Respectivelya.
n (EEW/g mol –1) |
isomeric
ratio |
||||
---|---|---|---|---|---|
resin | basis | titration | NMR | HPLC | NMR |
DER 354 | DGEBF | 0.10 (169) | 0.10 (169) | 40:45:15 | 47:40:13 |
PY306 | DGEBF | 0.08 (167) | 0.07 (165) | 30:50:20 | 36:49:14 |
E828 | DGEBA | 0.13 (188) | 0.13 (188) | n/a | |
DER 332 | DGEBA | 0.02 (174) | 0.01 (172) | n/a |
For more details on how values were obtained, see the Supporting Information.