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. 2021 Jun 15;3(7):3438–3445. doi: 10.1021/acsapm.1c00378

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
a

For more details on how values were obtained, see the Supporting Information.