Reheological Properties of crosslinked Poly Acrylate in Semi-batch Precipitation Polymerization

In the present work, highly cross-linked, PAA particles were prepared under various process (batch and semi-batch process). Types of process affects very strongly on network strength. Therheological method was used to determine the strength of swollen gel. Measuring storage modulus(G') and loss modulus (G') were carried out at constant frequency and in a range of strains (0.001- 200 Pa). Furthermore, G' and G were obtained at constant strain over a range of frequencies (0.1- 100 Hz). Improving strength of network observed when sample prepared via the batch process.Finaly, the rotational viscosity was used to determine thickening properties and the pseudoplasticbehavior of samples. The semi-batch process has a good effective on increasing viscosity as compared batch process.

کلیدواژه ها:

Reheological Praperties ، Poly Acrylate ، Semi-batch ، Precipitation Polymerization