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首页> 外文期刊>Journal of Applied Polymer Science >Study of high thermal conductive epoxy resins containing controlled high-order structures
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Study of high thermal conductive epoxy resins containing controlled high-order structures

机译：含受控高阶结构的高导热环氧树脂的研究

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Heat is transported by phonons through dielectric solids such as ceramics and organic insulating resins. Especially in organic insulating resins, phonons scatter intensely mainly by their amorphous structure, which affects their thermal conductivities, usually 1 to 3 orders lower than those of ceramics and metals. Here, we show that by the thermosetting resin system with a crystal-like structure that is microscopic anisotropy, the thermal conductivities of the resin themselves can be improved while keeping their macroscopic isotropy. We studied four kinds of diepoxy monomers with a biphenyl group or two phenyl benzoate groups as mesogens, and cured them thermally with an aromatic diamine curing agent. These thermal conductivities were maximally 5 times higher than that of conventional epoxy resins because mesogens were highly ordered to form crystal-like structures to suppress phonon scattering. We also succeeded in the direct confirmation of the existence of crystal-like structures in the epoxy resins by TEM observation. These results suggest a novel strategy to improve thermal conductivities of insulating resins themselves by controlling the high-order structures. (C) 2003 Wiley Periodicals, Inc. [References: 16]
机译：声子通过介电固体（例如陶瓷和有机绝缘树脂）传递热量。尤其是在有机绝缘树脂中，声子主要由于其非晶结构而强烈地散射，这影响了它们的导热率，通常比陶瓷和金属的导热率低1-3个数量级。在此，我们表明，通过具有微观各向异性的晶体状结构的热固性树脂体系，可以在保持其宏观各向同性的同时提高树脂本身的热导率。我们研究了以联苯基或两个苯甲酸苯酯为介晶的四种二环氧单体，并用芳族二胺固化剂对其进行热固化。这些热导率最大比常规环氧树脂高5倍，因为介晶高度有序地形成了晶体状结构以抑制声子散射。通过TEM观察，我们还成功地直接确认了环氧树脂中晶体状结构的存在。这些结果提出了通过控制高阶结构来提高绝缘树脂自身的热导率的新颖策略。 （C）2003 Wiley Periodicals，Inc. [参考：16]

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