Based on the results of integrated analysis given in parts 1 and 2, a kinetics-gelation mechanism of styrene (ST)/unsaturated polyester (UPE) resins is proposed. The curing process can be divided into five stages: induction, microgel formation, transition with or without phase separation, macrogelation and post-gelation. A summary of the experimental results at different stages of ST/UPE resins with ST/UPE molar ratios of 2 and 4 at 40°C is given. The kinetics-gelation mechanism based on the concept of microstructure formation is then discussed
Посилання на статтю:
Free-radical crosslinking copolymerization of styrene/unsaturated polyester resins: 3. Kinetics-gelation mechanism / C. P. Hsu and L. James Lee // Polymer. – 1993. – Vol 34. – P. 4516-4523.