Abstract
Poly(ethylene glycol) diacrylate (PEGDA) was synthesized by reacting poly(ethylene glycol) and acrylol chloride. PEGDA network formation was induced by using benzoyl peroxide (BPO) as a curing agent. Polyurethane (PU) network was prepared by reacting equimolar amounts of trimethylol propane (TMP) and desmodur L. Simultaneous interpenetrating polymer network (SIN) was prepared by using the same curing method. Changes of functional groups were monitored by FTIR. Kinetic study of the SIN formation was done at 70, 75, 80, and 85 °C. The kinetic parameters were compared with those of the respective PEGDA and PU network formation. Experimental results revealed that SIN indicated a lower rate constant and a higher activation energy than the respective pure PEGDA and PU components. A network interlock effect was proposed to explain the observed phnomenon.
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