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首页> 美国卫生研究院文献>Materials >POSS Nanofiller-Induced Enhancement of the Thermomechanical Properties in a Fluoroelastomer Terpolymer
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POSS Nanofiller-Induced Enhancement of the Thermomechanical Properties in a Fluoroelastomer Terpolymer

机译：POSS纳米填料诱导氟弹性体三元共聚物中热机械性能的增强

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摘要

The present study reports on the use of three types of polyhedral oligomeric silsesquioxanes (POSS) nanoparticles with various organic substituents as fillers in a fluoroelastomer (FKM). A series of/POSS elastomer composite thin films is prepared. Microstructural SEM/TEM (scanning electron microscopy/transmission electron microscopy) imaging reveals a dispersion state allowing the presence of micron-sized domains. The influence of POSS content is studied in order to optimize thermal stability and mechanical properties of the composite thin films. Both POSS-A (with an acryloyl functional group and seven isobutyl substituents) and POSS-P (with eight phenyl substituents) lead to higher thermal stability and modulus of the composites, with respect to the unfilled FKM terpolymer matrix. covalent grafting of POSS-A onto the FKM network is found to play a critical role. Enhanced storage modulus in the rubbery plateau region (+210% at 200 °C for 20 phr) suggests that POSS-A is particularly suitable for high temperature applications.
机译：本研究报告了使用三种具有各种有机取代基的多面体低聚倍半硅氧烷（POSS）纳米颗粒作为氟橡胶（FKM）中的填料。制备一系列/ POSS弹性体复合薄膜。显微结构SEM / TEM（扫描电子显微镜/透射电子显微镜）成像显示出分散状态，允许存在微米大小的区域。研究了POSS含量的影响，以优化复合薄膜的热稳定性和机械性能。相对于未填充的FKM三元共聚物基质，POSS-A（具有丙烯酰基官能团和七个异丁基取代基）和POSS-P（具有八个苯基取代基）均导致复合材料具有更高的热稳定性和模量。发现POSS-A的共价接枝到FKM网络上起关键作用。橡胶高原区域的储能模量提高（200°C，20 phr时+ 210％）表明POSS-A特别适用于高温应用。

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