POLYOLEFIN COMPOSITIONS WITH IMPROVED MECHANICAL AND BARRIER PROPERTIES

Polymer compositions may include a polymer matrix containing a polyolefin, one or more polymer particles dispersed in the polymer matrix, wherein the one or more polymer particles include a polar polymer selectively crosslinked with a crosslinking agent, and wherein the one or more polymer particles has an average particle size of up to 200 [mu]m. Processes of preparing a polymer composition may include mixing a polyolefin, a polar polymer, and a crosslinking agent; and selectively crosslinking the polar polymer with the crosslinking agent in the presence of the polyolefin. Methods may includeincreasing stress cracking resistance of a polyolefin by mixing a polar polymer with the polyolefin; and selectively crosslinking the polar polymer in the presence of the polyolefin with a crosslinking agent to form crosslinked polar polymer particles dispersed in the polyolefin. 聚合物组合物可以包含含有聚烯烃的聚合物基体、分散在所述聚合物基体中的种或多种聚合物颗粒，其中所述种或多种聚合物颗粒包含选择性地与交联剂交联的极性聚合物，并且其中所述种或多种聚合物颗粒具有至多200μm的平均粒度。制备聚合物组合物的方法可以包括：混合聚烯烃、极性聚合物和交联剂；和在所述聚