期刊
ACS MACRO LETTERS
卷 11, 期 12, 页码 1325-1330出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.2c00507
关键词
-
资金
- NSF [2124814]
We investigated the mechanical properties of polymer nanocomposites by varying the dispersion state of nanoparticles. By performing creep measurements, we overcame the limitations of small amplitude oscillatory shear experiments and discovered the reinforcing effect and percolation loading threshold of specific nanoparticle morphology on the system.
We systematically vary the nanoparticle (NP) dispersion state in composites formed by mixing polyisoprene homopolymers with polyisoprene grafted silica particles, and demonstrate how creep measurements allow us to overcome the limitations of small amplitude oscillatory shear (SAOS) experiments. This allows us to access nearly 13 orders in time in the mechanical response of the resulting composites. We find that a specific NP morphology, a percolating particle network achieved at intermediate graft densities, significantly reinforces the system and has a lower NP percolation loading threshold relative to other morphologies. These important effects of morphology only become apparent when we combine creep measurements with SAOS reemphasizing the role of synergistically combining methods to access the mechanical properties of polymer nanocomposites over broad frequency ranges.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据