Abstract
Surface properties of polymers play critical roles in many applications. For optimum performance it is desirable to have balanced bulk/surface properties in the resin used. There are various methods for the surface modification of polymeric materials, however, most of them are based on the surface treatment of the finished product. In this paper we try to demonstrate the use of specially designed siloxane containing copolymers as surface modifying additives for various organic polymers. Surface modification is usually achieved by blending small amounts of specific siloxane copolymers into the base resin, which migrate to the surface of the system during processing. As our results and other literature data demonstrate, although siloxanes themselves are inherently hydrophobic, it is possible to obtain hydrophilic segments. Similarly one can attach other organic groups with specific functionalities onto the siloxanes, such as UV stabilizers, flame retardants, etc. in order to improve surface properties of the finished product. There are various factors which influence the kinetics of migration of these additives to the surface. They include the composition, molecular weight and architecture of the siloxane copolymer used, level of additive in blend, method of sample preparation and annealing.
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