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2, the filled symbols show the linear swelling ratio [alpha] of PDMAEMA hydrogels crosslinked with TEGMA in water plotted as a function of the crosslinked polymer concentration after the gel preparation [[phi].
4, in which, the elastic modulus G of PDMAEMA hydrogels crosslinked with TEGMA is shown by the solid symbols and that of hydrogels crosslinked with BAAm is shown by the open symbols as a function of the volume fraction of the crosslinked polymer after the gel preparation [[phi].
This is because, the crosslinker TEGMA contains four oxyethylene repeating units, it bears long chain spacer between two vinyl groups and also during the swelling process, the network chains are forced to attain more elongated and less probable configurations.
6, the solid symbols show the average network chain length N of PDMAEMA hydrogels crosslinked with TEGMA and the open symbols show that of the hydrogels crosslinked with BAAm.
03 for the hydrogels crosslinked with TEGMA and that of [chi] = 0.
Figure 7 shows the effect of pH on the water content of PDMAEMA hydrogels crosslinked with TEGMA and with BAAm at different gel preparation concentrations.
It can be observed that the hydrogels crosslinked with TEGMA are in the swollen-state in acidic condition and in the collapsed-state in alkaline condition, demonstrating We same characteristics of hydrogels crosslinked with BAAm.
The results for PDMAEMA hydrogels crosslinked with TEGMA and with BAAm collected in Fig.