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English
Published
: 2022-09-18
Synthesis of elevated-molecular-weight epoxy resins with aid of microwaves
Abstract
A new method of synthesis of elevated-molecular-weight (E-M) epoxy resins with desired epoxy-groups content, based on polyaddition of bisphenol A to a lower-molecular-weight (L-M) epoxy resin (epoxy value EV = 0.57 mol/100 g) under microwave irradiation in the presence of 2-methylimidazole, as a catalyst, was described. Syntheses were carried out in a multimode microwave reactor "Plazmatronika" (Poland) of microwave frequency 2.45 GHz and maximal microwave power 300 W. Analogical syntheses have been done using conventional heating for the comparison of the methods. Values of EV, Mn, Mw and Mw/Mn of the products obtained were determined. The main advantage of the process is twofold reduction of reaction time of the processes carried at microwave reactors in comparison to the conventional heating.
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Bogdał, D., Pielichowski, J., Penczek, P., Górczyk, J., & Kowalski, G. (2022). Synthesis of elevated-molecular-weight epoxy resins with aid of microwaves. Polimery, 47(11-12), 842–844. Retrieved from https://ichp.vot.pl/index.php/p/article/view/2040
