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首页> 外文期刊>Journal of Applied Polymer Science >Highly Exfoliated Nanostructure in Trifunctional Epoxy/Clay Nanocomposites Using Boron Trifluoride as Initiator
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Highly Exfoliated Nanostructure in Trifunctional Epoxy/Clay Nanocomposites Using Boron Trifluoride as Initiator

机译：使用三氟化硼作为引发剂的三官能环氧/粘土纳米复合材料中的高度剥离纳米结构

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摘要

Epoxy/clay nanocomposites based upon a trifunctional epoxy resin, triglycidyl p-amino phenol (TGAP), have been prepared by intercalating an initiator of cationic homopolymerization, a boron trifluoride monoethylamine (BF_3·MEA) complex, into the montmorillonite clay galleries before the addition of the TGAP and the curing agent, 4,4-diamino diphenyl sulfone (DDS), and effecting the isothermal curing reaction. The BF_3·MEA enhances the intragallery cationic homopolymerization reaction, which occurs before the extragallery cross-linking reaction of the TGAP with the DDS, and which hence contributes positively to the mechanism of exfoliation of the clay. The effects of isothermal cure temperature and of BF_3·MEA content have been studied, in respect of both the reaction kinetics, monitored by differential scanning calorimetry, and the nanostructure, as identified by small-angle X-ray scattering and transmission electron microscopy. It is shown that the use of BF_3·MEA in this way as an initiator of intragallery homopolymerization significantly improves the degree of exfoliation in the cured nanocomposites.
机译：通过在加入前将阳离子均聚引发剂三氟化硼单乙胺（BF_3·MEA）络合物嵌入蒙脱土粘土通道中，制得了基于三官能环氧树脂三缩水甘油基对氨基苯酚（TGAP）的环氧树脂/粘土纳米复合材料。 TGAP和固化剂4,4-二氨基二苯砜（DDS）的作用，并影响等温固化反应。 BF_3·MEA增强了画廊内阳离子均聚反应，该反应发生在TGAP与DDS的画廊外交联反应之前，因此对粘土的剥离机理有积极作用。就通过差示扫描量热法监测的反应动力学以及通过小角X射线散射和透射电子显微镜鉴定的纳米结构而言，已经研究了等温固化温度和BF_3·MEA含量的影响。结果表明，以这种方式使用BF_3·MEA作为画廊内均聚的引发剂，可以显着提高固化纳米复合材料的剥离程度。

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