Abstract
Interpenetrating polymer network (IPN), gradient IPN and BaTiO3 filled IPN, composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) curing at room temperatures were prepared. Then the effect of soft/hard segment ratio in polyurethane (PU), component ratio of PU to UP in IPN, adding amount of BaTiO3 in filled IPN, the component sequences and interval times between each IPN for gradient IPN, on morphology and mechanical behavior of IPN and BaTiO3/IPN nanocomposites with different molecular weight of PU were studied systematically. Moreover, the investigation on the relationship between the morphologies and the mechanical properties indicated that the IPN with finer morphology exhibited an excellent consistency of the higher strengths and elongations.
Highlights
Owing to the mutual entanglement structural characteristics created by the forced compatibility and the synergism of the two networks of Interpenetrating polymer network (IPN), the mechanical properties of IPN are superior to those of ordinary polymers [1,2]
In the present work, a series of BaTiO3 filled and unfilled interpenetrating polymer networks (IPN), gradient IPN composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) with different molecular weight of PU were prepared
The aim of the work is to investigate the effect of molecular weight of PU with different soft/hard segment ratio in PU, different component ratio of PU to UP in IPN and different adding amount of BaTiO3 in filled IPN, and the component sequences and interval times of each IPN in the gradient IPN, on the morphology and the mechanical properties, and to reveal the relationship between the morphologies and their mechanical properties
Summary
Owing to the mutual entanglement structural characteristics created by the forced compatibility and the synergism of the two networks of IPN, the mechanical properties of IPN are superior to those of ordinary polymers [1,2]. In our previous papers [10], two series of IPN, BaTiO3 filled IPN, and the gradient IPN have been prepared, and some properties of such materials have been investigated in details. In the present work, a series of BaTiO3 filled and unfilled interpenetrating polymer networks (IPN), gradient IPN composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) with different molecular weight of PU were prepared. The aim of the work is to investigate the effect of molecular weight of PU with different soft/hard segment ratio in PU, different component ratio of PU to UP in IPN and different adding amount of BaTiO3 in filled IPN, and the component sequences and interval times of each IPN in the gradient IPN, on the morphology and the mechanical properties, and to reveal the relationship between the morphologies and their mechanical properties
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