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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical and thermal properties of phenolic resin-layered silicate nanocomposites synthesized by melt intercalation
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Mechanical and thermal properties of phenolic resin-layered silicate nanocomposites synthesized by melt intercalation

机译：熔融插层法合成酚醛树脂层状硅酸盐纳米复合材料的力学和热性能

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摘要

Phenolic resin-layered silicate nanocomposites (PLSNs) were synthesized by melt intercalation with linear novolac resin (P1) and organosilicates such as montmorillonite modified by benzyldimethyloctadecylammonium. (C18BM) and by bis(2-hydroxy-ethyl)methyl tallow ammonium (THEM). The PLSNs were prepared by a sequential process (IC) in which phenolic resin was melt-intercalated into organosilicate and subsequently cured with hexamethylenetetramine (HMTA). It was found from X-ray diffraction measurements that P1THEMIC nanocomposites showed better silicate dispersion than did P1C18BMIC nanocomposites, even though both systems had intercalated morphologies. The larger silicate gallery expansion in P1THEMIC nanocomposites was attributed to the strong hydrogen-bonding interaction between the phenolic resin and hydroxyl groups of the organic modifier of THEM. As they had better silicate dispersion, the P1THEMIC nanocomposites showed better mechanical properties than the P1C18BMIC nanocomposites. The thermal stability of the P1THEMIC nanocomposites was slightly increased or decreased, depending on the silicate content, relative to the neat phenolic resin. (C) 2003 Wiley Periodicals, Inc. [References: 28]
机译：酚醛树脂层状硅酸盐纳米复合材料（PLSN）通过与线性线型酚醛清漆树脂（P1）和有机硅酸盐（如经苄基二甲基十八烷基改性的蒙脱土）熔融插层而合成。 （C18BM）和双（2-羟基-乙基）甲基牛脂铵（THEM）。通过顺序过程（IC）制备PLSN，其中将酚醛树脂熔融插入到有机硅酸盐中，然后用六亚甲基四胺（HMTA）固化。从X射线衍射测量发现，P1THEMIC纳米复合材料显示出比P1C18BMIC纳米复合材料更好的硅酸盐分散性，即使两个系统都具有插层形态。 P1THEMIC纳米复合材料中较大的硅酸盐通道扩展量归因于酚醛树脂与THEM有机改性剂的羟基之间的强氢键相互作用。由于它们具有更好的硅酸盐分散性，因此P1THEMIC纳米复合材料比P1C18BMIC纳米复合材料具有更好的机械性能。相对于纯酚醛树脂，P1THEMIC纳米复合材料的热稳定性根据硅酸盐含量而略有增加或降低。 （C）2003 Wiley Periodicals，Inc. [参考：28]

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