材料科学
环氧树脂
钼酸铵
硅氧烷
扫描电子显微镜
固化(化学)
钼酸盐
玻璃化转变
胶粘剂
硅烷
小角X射线散射
复合材料
混合材料
钼酸钠
醇盐
化学工程
高分子化学
散射
图层(电子)
有机化学
聚合物
化学
纳米技术
冶金
催化作用
锌
工程类
物理
光学
作者
Mariateresa Lettieri,Francesca Lionetto,Luca Prezzi,L. Mascia
摘要
Abstract Experimental organic–inorganic hybrid systems, based on silane functionalized difunctional and trifunctional epoxy resins and an alkoxysilane precursor mixture, containing small amounts of ammonium molybdate, are evaluated for potential use as adhesives cured at ambient temperatures. The precursor resin mixtures are found to exhibit a large increase in viscosity with a pseudoplastic behavior. Scanning electron microscopy (SEM) analysis shows the existence of siloxane domains with nanometric dimensions, except for the presence of microscopic molybdate particles. By monitoring the evolution of the glass transition temperature ( T g ) during curing, varying the thickness of the specimens between 0.2 and 4.5 mm, it is found that the organic–inorganic hybrids display a significant increase in the final T g over the parent unmodified epoxy resins, particularly in thin specimens and when ammonium molybdate is added. Small‐angle X‐ray scattering (SAXS) spectra show that the dimensions and typographic features of thick and thin specimens are similar, both containing an agglomeration of primary particles of 5–6 nm. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers
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