Cloisite 30B as a modified kind of nanoclay was utilized for the formation of 3D network based on novolac resin with high thermal stable properties. Two types of phenolic resins including neat novolac (NR) and modified novolac resin were used to create a compatible matrix with nanoclay. For this purpose, NR modified with (3‐chloropropyl)triethoxysilane (CPTES) to form SiNR. For improvement of thermal behaviors, Cloisite 30B was dispersed in matrix via ultrasonic waves and cured with hexamethylenetetramine (HMTA) to form 3D network. X‐ray diffraction (XRD) analysis was used to measure the d‐spacing in intercalated systems and results indicated the optimum amount of clay for appropriate thermal properties. Investigation of the thermal properties of the samples by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) showed that the presence of Cloisite 30B in matrix resulted in much higher thermal stability and char yield with respect to modification of novolac resin originated from formation of 3D Si–O–Si network. Also, cured modified resin and its nanocomposites showed much higher thermal stability than cured NR and its nanocomposites. Such nanocomposite materials with high thermal stability have potential applications in advanced fields such electronic, industrial molds, coatings, adhesives, and aerospace composites.

中文翻译：

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通过树脂结构的化学改性制备高热稳定性的固化型线型酚醛清漆/次氯酸盐30B纳米复合材料

Cloisite 30B作为一种改性的纳米粘土，被用于基于具有高热稳定性能的线型酚醛树脂的3D网络的形成。包括纯线型酚醛清漆（NR）和改性线型酚醛清漆树脂在内的两种酚醛树脂用于创建与纳米粘土相容的基质。为此，用（3-氯丙基）三乙氧基硅烷（CPTES）改性NR以形成SiNR。为了改善热行为，Cloisite 30B通过超声波分散在基质中，并用六亚甲基四胺（HMTA）固化以形成3D网络。X射线衍射（XRD）分析用于测量d在插层系统中的间距和结果表明，对于适当的热性能，粘土的最佳用量。通过差示扫描量热法（DSC）和热重分析（TGA）对样品的热性能进行研究表明，基质中Cloisite 30B的存在相对于由酚醛清漆树脂的形成引起的酚醛清漆树脂的改性具有更高的热稳定性和炭收率。 3D Si–O–Si网络。而且，固化的改性树脂及其纳米复合材料比固化的NR及其纳米复合材料显示出更高的热稳定性。具有高热稳定性的此类纳米复合材料在电子，工业模具，涂料，粘合剂和航空航天复合材料等先进领域中具有潜在的应用。