The mechanical, thermal and ablation properties of carbon phenolic (C-Ph) composites (Type-I) reinforced with different weight percentages of organo-modified montmorillonite (o-MMT) nanoclay have been studied experimentally. Ball milling was used to disperse different weight (wt) percentages (0, 1,2,4,6 wt.%) of nanoclay into phenolic resin. Viscosity changes to resin due to nanoclay was studied. On the other hand, nanoclay added phenolic matrix composites (Type-II) were prepared to study the dispersion of nanoclay in phenolic matrix by small angle X-ray scattering and thermal stability changes to the matrix by thermogravimetric analyser (TGA). This data was used to understand the mechanical, thermal and ablation properties of Type-I composites. Inter laminar shear strength (ILSS), flexural strength and flexural modulus of Type I composites increased by about 29%, 12% and 7% respectively at 2 wt.% addition of nanoclay beyond which these properties decreased. This was attributed to reduced fiber volume fraction (%V_f) of Type-I composites due to nanoclay addition at such high loadings. Mass ablation rate of Type-I composites was evaluated using oxy acetylene torch test at low heat flux (125 W/cm²) and high heat flux levels (500 W/cm²). Mass ablation rates have increased at both flux levels marginally up to 2 wt.% addition of nanoclay beyond which it has increased significantly. This is in contrast to increased thermal stability observed for Type-I and Type-II composites up to 2 wt.% addition of nanoclay. Increased ablation rates due to nanoclay addition was attributed to higher insulation efficiency of nanolcay, which accumulates more heat energy in limited area behind the ablation front and self-propagating ablation mechanisms triggered by thermal decomposition of organic part of nanoclay.

实验研究了用不同重量百分比的有机改性蒙脱土（o-MMT）纳米粘土增强的碳酚（C-Ph）复合材料（I型）的机械，热和烧蚀性能。球磨用于将不同重量百分比的纳米粘土（0、1、2、4、6、6％）分散到酚醛树脂中。研究了由于纳米粘土引起的树脂粘度变化。另一方面，制备了添加纳米粘土的酚醛基复合材料（II型），以通过小角度X射线散射和热重分析仪（TGA）研究纳米粘土在酚醛基体中的分散性和对基体的热稳定性变化。该数据用于了解I型复合材料的机械，热和烧蚀性能。层间剪切强度（ILSS），当添加2重量％的纳米粘土时，I型复合材料的抗弯强度和挠曲模量分别增加了约29％，12％和7％，超过这些重量，这些性能下降。这归因于减少的纤维体积分数（％由于在如此高的负载下添加了纳米粘土，因此I型复合材料的V _f）。使用氧乙炔炬试验在低热通量（125 W / cm ²）和高热通量水平（500 W / cm ²）下评估I型复合材料的质量烧蚀速率）。在两种助熔剂水平下，质量烧蚀率均略有增加，直至添加了2 wt。％的纳米粘土，之后其显着增加。这与添加至多2重量％的纳米粘土对I型和II型复合材料观察到的增加的热稳定性相反。纳米粘土的添加导致了更高的烧蚀速率，这归因于纳米熔窑的更高的绝缘效率，其在烧蚀前沿后面的有限区域中积累了更多的热能，以及由纳米粘土的有机部分的热分解触发的自蔓延烧蚀机制。