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A full acrylic interpenetrating polymer networks based on Poly Hexyl-Ethyl-Acrylate and Poly Butyl-Acrylate networks were synthesized by sequential polymerization technique. The investigated systems are prepared via photo-polymerization by UV-curing of monomers in the presence of a difunctional crosslinker and a photoinitiator. The IPNs properties have been improved by varying the initial composition and the crosslinker ratio.The systems are characterized by means of Infrared spectroscopy, swelling, DSC and ATG techniques. We found that the polymer networks have large swelling ratios, reflecting the higher compatibility of the two chosen monomers to form an IPN. Surprisingly, the resulted interpenetrating polymer networks with 0.5% crosslinker does not present any phase separation. We confirmed, by DSC and ATG techniques, that the quantity of the absorbed monomer by the precursory network played major roles in the physical properties of the different resulting IPNs and increasing the crosslinker prevent formation of unreacted oligomers inside the IPNs and thus leads to a more stable networks in their structures.