Research Article
Functional Modification Effect of Epoxy Oligomers on the Structure and Properties of Epoxy Hydroxyurethane Polymers
Table 1
Characteristics of OECC based on epoxy oligomers.
| | The chemical nature of epoxy oligomers (epoxy number (%)) | Radicals, reflecting the nature of the OECC, R = | Conditional abbreviation of OECC | Content of epoxy groups (%) (residual) | Saponification number, (mg KOH/g) | Viscosity at 25°C (Pa·s) | Tm (°C) | Density, 20°C (g/cm³) | Appearance | | Determined | Calculated |
| | Epoxidated oligomer ED-20 (21.6%) based on bisphenol-A | | DCC/ED-20 | 0.10 | 452 | 459 | — | 55 | — | A hard brittle mass of yellow color (brown-white powder after grinding) | | Diglycidyl oligomer based on diethylene glycol DEG-1 (26.8%) | | DCC/DEG-1 | 0.17 | 552 | 560 | 1.12 | — | 1.4762 | Low-viscosity liquid of yellowish color | | Diglycidyl oligomer based on dipropylene glycol (25.5%) | | DCC/DPG | 0.16 | 530 | 535 | 1.85 | — | 1.4722 | Liquid of yellowish color | | Diglycidyl oligomer based on 1.1-di (oxymethyl)-3-cyclohexene (25.0%) | | DCC/DOC | 0.06 | 555 | 560 | 26.10 | — | 1.4960 | Viscous liquid of cherry color | | Epoxy oligomer based on epichlorohydrin (polyepicholorhydrin) -E-181 (25.9%) | | DCC/E-181 | 0.10 | 524 | 522 | 17.04 | — | 1.4906 | Viscous liquid of cherry color |
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