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首页> 外文会议>High performance fillers for polymer composites 2009 >MODIFICATION IN MECHANICAL AND THERMAL PROPERTIES OF EPOXY BY NANOCLAY REINFORCEMENT THROUGH SUPERCRITICAL CARBON DIOXIDE
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MODIFICATION IN MECHANICAL AND THERMAL PROPERTIES OF EPOXY BY NANOCLAY REINFORCEMENT THROUGH SUPERCRITICAL CARBON DIOXIDE

机译：通过超临界二氧化碳纳米粘土增强对环氧树脂的力学和热学性质的改性

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摘要

A composition comprising Diglycidyl ether of bisphenol-A (0.1 mole) and cetyl pyridine bromide modified montmorillonite nanoclay (5%, w/v) was treated at 3000psi, 90±1℃ for 1h in supercritical carbon dioxide, followed by curing of treated epoxy with triethylene tetramine (10 phr) at 40±1℃.This has afforded corresponding clay epoxy nanocomposite The formation of clay epoxy nanocomposite was ascertained through UV-vis, XRD spectra and TEM. Uv/vis absorption spectra of clay epoxy nanocomposite shows that the visible region (400-700 nm) was significantly affected at all by the presence of the clay and induced loss in transparency of epoxy. For the ultraviolet region, there is weak scattering and or absorption resulting in a very high absorption of the UV light. TEM reveled hybrid structure of nanocomposite with coexistence of exfoliated and intercalated structures . Because of the parallel assembly of the silicates , the intercalated structure has provided X ray diffraction peaks Clay reinforcement has enhanced tensile strength, compressive strength, elongation (%), Rockwell hardness (R scale) of epoxy with decrease in wear behavior at a series of hydraulic end load ranging 1.0-3.0 bar at 340 rpm and Izod impact strength respectively. Simultaneous thermogravimetric-differential thermal analysis- differential thermogravimetry reveled that clay reinforcement has enhanced flame redundancy and resistance of epoxy against thermo oxidation.
机译：将包含双酚A的二缩水甘油醚（0.1摩尔）和十六烷基吡啶溴化物改性的蒙脱土纳米粘土（5％，w / v）的组合物在超临界二氧化碳中于3000psi，90±1℃下处理1h，然后固化处理过的环氧树脂。用三亚乙基四胺（10 phr）在40±1℃下制得相应的粘土环氧纳米复合材料。通过紫外可见光谱，XRD和TEM证实了粘土环氧纳米复合材料的形成。粘土环氧纳米复合材料的Uv / vis吸收光谱表明，可见光区域（400-700 nm）完全受到粘土的存在的影响，并引起环氧树脂透明性的损失。对于紫外线区域，散射和/或吸收较弱，导致紫外线吸收非常高。 TEM揭示了纳米复合材料的杂化结构与脱落和嵌入结构的共存。由于硅酸盐的平行组装，插层结构提供了X射线衍射峰。粘土增强剂具有增强的环氧树脂的拉伸强度，抗压强度，伸长率（％），洛氏硬度（R标度），并且在一系列磨损下降低了磨损行为。 340 rpm时的液压端载荷范围为1.0-3.0 bar，艾佐德冲击强度分别为。同时进行热重-差示热分析-差示热重分析表明，粘土增强剂具有增强的火焰冗余性和环氧树脂的抗热氧化性。

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