A propylene-based polymer composition is characterized by a melt strength at 190 C. of at least 20 cN, a melt drawability at 190 C. of at least 100 mm/s, and a flexural modulus at room temperature of at least 240,000 psi. The propylene-based polymer composition includes a propylene-based polymer resin having a crystallinity of at least 50% coupled with a poly(sulfonyl azide).

The present disclosure describes a process for producing a surface-treated fabricated article, the process comprising providing a polyolefin resin; converting the polyolefin resin to a fabricated article; crosslinking at least a portion of the fabricated article; and modifying the surface of the fabricated article with a sulfuric acid, fuming sulfuric acid, or chlorosulfonic acid-containing solution surface-treating agent to yield the surface-treated fabricated article. The present disclosure further describes a process for producing a surface-treated fabricated article comprising providing a polyolefin resin; converting the polyolefin resin to a fabricated article; crosslinking at least a portion of the fabricated article; applying a sulfuric acid solution to the fabricated article; and heating the fabricated article in air or an inert environment.