Effects of crystallization on micro-mechanical behavior of polyethylene nanocomposites using Raman spectroscopy
Year: 2025
Type: article
Abstract: Recent work has shown that nanoparticles can be ordered in semicrystalline polymers by controlling the crystallization rate, specifically by forcing them to migrate to the amorphous regions of the lamellar morphology. Here, we study the micromechanical behavior of neat polyethylene and silica/polyethylene nanocomposites filled with 15 nm brush-modified silica in the quenched and slow-crystallized organized state. The molecular response to loading in tension was monitored with Raman spectroscopy using the peaks associated with crystalline and amorphous regions. The addition of nanofillers dramatically reduced the shift in the amorphous peaks, indicating that in addition to carrying some load, the brush-modified nanoparticles may be acting as tie molecules that restrict amorphous deformation. The higher degree of lamellar organization and the organization of the nanoparticles also impacted the crystalline peak shifts, but more subtly.
Source: Nanocomposites
Institutions: University of Vermont, Columbia University, Ikerbasque, University of the Basque Country, Polymat, Universidad de Zaragoza, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine, Instituto de Nanociencia y Materiales de Aragón, University of South Carolina
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,590
Awards: G1064115137, G3337372831, USING CRYSTALLIZATION TO CONTROL FILLER DISPERSION AND VICE VERSA IN POLYMER NANOCOMPOSITES, G4289840846, USING CRYSTALLIZATION TO CONTROL FILLER DISPERSION AND VICE VERSA IN POLYMER NANOCOMPOSITES, USING CRYSTALLIZATION TO CONTROL FILLER DISPERSION AND VICE VERSA IN POLYMER NANOCOMPOSITES, Graduate Research Fellowship Program (GRFP), ROLE OF HETEROGENEOUS SEGREGATION ON SHEAR LOCALIZATION MECHANISMS IN NANOCRYSTALLINE ALLOYS, G6314350022, ROLE OF HETEROGENEOUS SEGREGATION ON SHEAR LOCALIZATION MECHANISMS IN NANOCRYSTALLINE ALLOYS, FUNDAMENTALS OF SCALABLE NP ASSEMBLY IN ENGINEERING POLYMERS, USING CRYSTALLIZATION TO CONTROL FILLER DISPERSION AND VICE VERSA IN POLYMER NANOCOMPOSITES
OpenAlex ID: W4408097252