Affiliation:
1. University of Michigan – Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University Shanghai China
2. Center for Solid‐battery Research Global Institute of Future Technology, Shanghai Jiao Tong University Shanghai China
Abstract
AbstractThis study investigates the physical aging process of PMMA‐TiO2 nanocomposites with different particle alignments. By using an external electric field to control the alignment of TiO2 particles, a uniform distribution of TiO2 particles in PMMA is transformed into a micrometer‐level pillar structure. The physical aging process is measured using differential scanning calorimetry, and the particle alignment is confirmed by microscopy. Comparison of the aging behavior of different samples shows that the addition of randomly distributed TiO2 nanoparticles accelerates the aging rate of the material. However, when the nanoparticles are realigned into a pillar structure, the aging rate significantly decreases. Moreover, in our experimental time scale, a dual‐relaxation mechanism of aging is observed in the PMMA/TiO2 nanocomposites. This work highlights the importance of particle alignment and structure on the aging behavior of polymer nanocomposites, which could have implications for designing materials with improved stability in applications that require slow aging.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry
Cited by
1 articles.
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