Abstract
The polycondensation of m-cresol with formaldehyde catalysed by oxalic acid in the presence of water-miscible organic solvent was investigated. The influence of the reagents' molar ratio and the effect of the nature and quantity of the solvent used on the molecular weight characteristics of the oligomers formed and on the content of free (waste) cresol therein and their softening temperatures were studied. It was established that the presence of water-miscible organic solvent causes a significant change in the viscosity of the reaction mixture and strongly affects the characteristics of the polycondensation process. The possible reasons for this influence are discussed. On the basis of the experiments performed an attempt was made to survey the interconnection between different individual factors affecting the polycondensation of cresols and formaldehyde.
| Original language | English |
|---|---|
| Pages (from-to) | 3067-3070 |
| Number of pages | 4 |
| Journal | Polymer |
| Volume | 32 |
| Issue number | 16 |
| DOIs | |
| State | Published - 1991 |
Keywords
- m-cresol
- novolac resins
- polycondensation
- properties
- reaction medium
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