Microstructural Contributions of Different Polyolefins to the Deformation Mechanisms of Their Binary Blends.

ABSTRACT: The mixing of polymers, even structurally similar polyolefins, inevitably leads to blend systems with a phase-separated morphology. Fundamentally understanding the changes in mechanical properties and occurring deformation mechanisms of these immiscible polymer blends, is important with respect to potential mechanical recycling. This work focuses on the behavior of binary blends of linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polypropylene (PP) under tensile deformation and their related changes in crystallinity and morphology. All of these polymers plastically deform by shear yielding. When unmixed, the high crystalline polyolefins HDPE and PP both exhibit a progressive necking phenomenon. LDPE initiates a local neck befor

SUBMITTER: Van Belle A 

PROVIDER: S-EPMC7285311 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature