| http://www.w3.org/ns/prov#value | - Examples of such PO type resins include polyethylene, polypropylene and poly-1-butene but are not limited to homopolymers, and as long as the main component is the ??-olefin having 2-20 carbon atoms, they can be copolymers with other ??-olefins having 2-20 carbon atoms, vinyl compounds such as vinyl acetate, vinyl chloride, acrylic acid, methacrylic acid, and styrene, or they can also be graft cop
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