System 4 wherein said polymer composition includes an additive and at least some of said additive is placed on the surface of the encapsulated structural elements and at least some of said additive is placed on one or {HEAD ~ both surfaces} of {TAIL ~ the internal layer} 
System 4 wherein said polymer composition includes an additive and at least some of said additive is placed on the surface of the encapsulated structural elements and at least some of said additive is placed on one or { HEAD ~ both surfaces } of { TAIL ~ the internal layer }
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