Abstract
AbstractMicrowave irradiation has been an interesting alternative for heating systems of several chemical reactions. In this work, a comparative study between microwave reactions and conventional heating is evaluated. The effects of temperature, power, and polyol type on the synthesis of poly(urea–urethane) by step polymerization in miniemulsion are evaluated and the final polymer is analyzed by Fourier transform infrared spectroscopy, gel permeation chromatography, contact angle, and nanoparticles size and size distribution are characterized by dynamic light scattering. Polymerization under microwave irradiation have a higher reaction rate showing advantages of using microwaves in this miniemulsion step polymerization processes. In addition, microwave irradiation also affects particle size, the solubility of the polyurethane, and the urea/urethane ratio.
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