A correlation between microstructure and rheological properties of broad MWD high-density polyethylene

Clarifying the effects of comonomer distribution between short and long chains on physical and mechanical properties of ethylenic copolymers

“…[22][23][24][25] For example, it has been commonly accepted that the incorporation of α-olefinic monomers (1-butene, 1-hexene, and 1-octene) can change the balance between crystalline and amorphous structures of polyolefines. [26][27][28][29][30] In addition, some of the practical properties of polyolefins can be altered with a minor change in short-chain branching patterns. [31][32][33][34][35] For example, it has been proved that introducing a small amount of 1-butene into the structure of polyethylene chains can improve its resistance against brittle failures.…”

“…[46] Some centers can quickly copolymerize monomers and comonomers, but the resulting chains are short in length. [28,29,47] On the other hand, other centers do not tend to comonomers but produce chains with higher molecular weight. That is why we witness both molecular weight distribution (MWD) and chemical composition distribution (CCD) in copolymers made by ZNCs.…”

Effects of Functional Additives on Structure and Properties of Polycarbonate-Based Composites Filled with Hybrid Chopped Carbon Fiber/Graphene Nanoplatelet Fillers

“…Furthermore, rheometers such as modular compact rheometer or capillary rheometer have been extensively applied to study the linear or non-linear viscoelastic rheological properties of polymeric melts and solutions for many years. [35][36][37][38] In this work, the effects of rheology modifier (SAN) and flame retardant (RXP) on the structures and rheology, and mechanical performances of PCbased composites were investigated. The flammability was evaluated by UL-94 and limiting oxygen index tests.…”