volume 34, issue 16, P1239-1249 1994
DOI: 10.1002/pen.760341603
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Abstract: Abstract In this study, an interpenetrating polymer network (IPN) based on a polyurethane (PU) and a partially end‐capped unsaturated polyester (UPE) was prepared. The reaction‐induced phase separation process of the IPN was studied using a phase contrast optical microscope and a transmission electron microscope (TEM), while reaction kinetics and onset of gelation were determined by a differential scanning calorimeter and a rheometer respectively. Except at low temperatures, the phase separation patterns were…

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