Said fabric compositions comprise fibers of olefin block interpolymers or homogeneous branched ethylene polymers or a combination thereof.

This specific property of interpolymer complexation may be utilized to design drug delivery systems of various release behaviors.

The Conditions for formation of IPN from castor oil polyurethane and homopolymer or copolymer of styrene, methylmethacrylate and acrylonitrile at room temperature were Studied.