期刊
COMPOSITES PART B-ENGINEERING
卷 138, 期 -, 页码 66-76出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2017.11.010
关键词
Cycloaliphatic epoxy; Nanosilica; Polymer matrix composites; POSS; Environmental stability
资金
- EPSRC
- Rola Tube Technology Ltd [EP/L505675/1]
- Engineering and Physical Sciences Research Council [1506679] Funding Source: researchfish
The purpose of this study is to demonstrate the properties of novel nanocomposites, based on cycloaliphatic epoxy resin additionally reinforced with silicon-containing nanostructures (mono-or octa-functional POSS or nanosillica). The changes in properties are discussed for the varied combinations of cycloaliphatic epoxy with a curing agent (cycloaliphatic amine or anhydride) and the nanomodifier. The influence of modification on thermal stability, curing behaviour, morphology, surface chemistry, and topography were studied with TGA, DSC, ATR-FTIR, XPS and LCM. The results show that when POSS and/or nanosilica are incorporated to the cycloaliphatic matrix they influence curing behaviour and glass transition temperatures (T-g), where mono-POSS increases T-g, and octa-POSS decreases it with respect to nanosilica. Mono-POSS produces silicon-rich surfaces but tends to agglomerate and increase surface roughness. Octa-POSS and nanosilica penetrate the polymer matrix more deeply and disperse more easily. From the selected modifiers, octa-POSS shows the highest thermal stability.
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