Interphase Percolation Mechanism Underlying Elastomer Reinforcement

Interphase Percolation Mechanism Underlying Elastomer Reinforcement
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弹性体增强层下的相间渗透机制

DOI:
10.1021/acs.jpcc.7b11239
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发表时间:
2017-12
影响因子:
3.7
通讯作者:
Guo Baochun
Guo Baochun
中科院分区:
化学3区
文献类型:
--
作者:
Wu Siwu;Qiu Min;Tang Zhenghai;Guo Baochun

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玻璃态界面相被认为对于弹性体纳米复合材料(ENC)的机械增强至关重要,但与增强渗透相关的界面拓扑的演变仍然不确定。在这里,利用实施相间渗透机制的精确界面调节策略来实现机械性能的渗透以实现弹性体增强。界面金属-配体桥的结构设计实现了弹性体骨架和碳纳米点之间的牢固锚定,从而形成界面金属富集区域。随着界面桥的增加,界面区域的体积分数系统性地扩大,最终与相邻区域重叠形成穿透的界面相。通过小角度 X 射线散射和介电测量来定量监测界面区域的拓扑演化,其在同步中表现出类似的渗透行为。
Glassy interphase has been claimed to be of vital importance for mechanical reinforcement of elastomer nanocomposites (ENCs), but the evolution of interphase topology in correlation to reinforcement percolation remains uncertain. Here, an accurate interfacial regulation strategy upon implementing an interphase percolation mechanism is exploited to realize percolation of mechanical performance toward striking elastomer reinforcement. Architecture design of interfacial metal–ligand bridges accomplishes firm anchoring between elastomer skeleton and carbon nanodots, leading to the formation of interfacial metal-enriched regions. The volume fraction of the interfacial region systemically enlarges upon increase of interfacial bridges, which finally overlaps with neighboring domains to form a penetrating interphase. The topological evolution of the interfacial region is quantitatively monitored upon small-angle X-ray scattering and dielectric measurements, which exhibits a similar percolation behavior in sync wi...
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