Increase in Surface Polarity of a Buffer-Rinsed Bio-Composite Upon Prolongation of Rinse Time

A Polymer composite was produced mixing RTV silicone rubber and poly (acrylic acid). A tendency t oadsorb noticeable volumes of water was observed. Also, polar componets of surface tension were observed to increase even after water absorption process has practically terminated. This effect may be attributed to migration of polar groups from the bulk of composite to its surface.

Keywords:

Composites , Biomaterials , Hydrogel , Poly (acrylic acid) , Surface Tension , Contact Angle , Surface Polarity