h Eshaghi - Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
h Bouhendi - Iran Polymer and Petrochemical Institute (IPPI), P.O. Box ۱۴۹۶۵-۱۱۵, Tehran, Iran
g BagheriMarandi - Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
m.j ZohurianMehr - Iran Polymer and Petrochemical Institute (IPPI), P.O. Box ۱۴۹۶۵-۱۱۵, Tehran, Iran

In this Study, two types of polymerization processes are used; batch and semi-batch. Sampeles were prepared by using long-chain acrylate crosslinker and acrylic acid monomer via precipitation polymerization. The effect of batch and semi-batch process on different features of microgel (i.e.,equilibrium swelling, gel content, and apparent viscosity) was investigated. This result shows that the type of process affects very strongly on the formation of cross-links in network and network properties. Since, the apparent viscosity of PAA-PE-550 by semi-batch process was highest even though the viscosity of PAA–PE-550 by batch process was least.

Semi-batch, batch ways, Poly acrylic acid, Precipitation presipitation, long chain acrylate crosslinker