(306b) Melt Behavior-Chain Architecture-Polymer Composition Correlations in High Density Polyethylene

Realization of suitable melt behavior is an important need to be addressed as part of the final properties in HDPEs. Slight variation in factors such as polymer architecture can lead to considerable changes in the final melt behavior. Current work undertakes understanding these disparate mechanisms, establishing correlations between notable rheological aspects and their molecular origins, and establishes molecular design strategies to tune melt behavior.

This study highlights experimental HDPEs synthesized from dual, single-site, co-supported catalysts exhibiting enhanced melt properties such as shear thinning, melt strength and extensibility compared to a few commercial samples. Commonality amongst the resins with the best melt performance is bimodality, and broad molecular weight distribution with well-defined splits and spreads. Additionally, investigations on other relevant processing parameters such as melt elasticity and strain hardening were also carried out, corroborating the need for multiple, pertinent analyses to establish performance enhancement per application

To summarize, the effort highlights improvements in melt properties attributing them to appropriate tuning of polymer chain architecture and molecular weight distribution, thus determining ultimate applicability to selective applications. Ultimately, this may serve as a pathway for producing innovative products that deliver business success and growth.