Amidation enhanced adhesion

The release effect of the LDPE film used for backing self adhesive coatings can be considerably enhanced by the addition of 2-3% amide wax. It is also available as an antiblocking system in granular form. This antiblocking system is also used successfully in the production of film and sheeting of injection-molded articles from EVA copolymers. 

Lee Y, Char K (2001) Enhancement of interfacial adhesion between amorphous poly amide and polystyrene by in situ copolymer formation at the interface. Macromoleeules 27 2603 2606... 

Several polymers other than PDMS and PVA have been examined for solid-polymer mixed-matrix pervaporation. An activated earbon-block polyether-amide mixed-matrix membrane was investigated for the separation of volatile organie eompounds (VOCs). An enhancement in both trichloroethane and water flux was noted, as well as increase in trichloroethane-water selectivity compared to the neat polymer. Zeolite-polyimide mixed-matrix membranes were explored for xylraie isomo- separation. Solid-polymer adhesion was poor, resulting in a sieve-in-a-eage morphology therefore, no separation properties that exceeded neat polymer membranes were identified. Methanol-toluene separation was successfully performed with NaX—Viton mixed-matrix membranes, though other solid-polymer combinations were attempted and failed to form an enhanced membrane. 

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