The invention provides a process to form a second composition comprising a modified ethylene-based polymer, the process comprising the step of contacting under thermal treatment conditions a first composition comprising a first ethylene-based polymer, and the following: (A) at least one carbon-carbon (C—C) free radical initiator; and (B) at least one free radical initiator other than a C—C free radical initiator of (A) (a non-C—C free radical initiator). The melt strength of the second composition is typically at least 15% or greater than the melt strength of the first composition. The second composition typically has a gel content less than or equal to 40.
本发明提供了一种形成包含改性
乙烯基聚合物的第二种组合物的工艺,该工艺包括以下步骤:在热处理条件下,将包含第一种
乙烯基聚合物的第一种组合物与以下物质接触:(A) 至少一种碳-碳(C-C)自由基
引发剂;和 (B) (A)中 C-C 自由基
引发剂以外的至少一种自由基
引发剂(非 C-C 自由基
引发剂)。第二种组合物的熔体强度通常比第一种组合物的熔体强度至少高 15%或更高。第二种组合物的凝胶含量通常小于或等于 40。