Investigation of thermal and mechanical properties of polybenzoxazine obtained in an in situ polymerization with surface-modified montmorillonite clay,Polymer Composites

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Investigation of thermal and mechanical properties of polybenzoxazine obtained in an in situ polymerization with surface-modified montmorillonite clay
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-13 , DOI: 10.1002/pc.26787
Malathi Devi Sundaramoorthy ₁ , Madhavan Durairajan ₁ , Jeyasubramanian Kadarkaraithangam ₁ , Vallinayagam Palani ₁

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A novel class of polymeric composite was prepared using benzoxazine polymer (BXP) obtained in an in situ method followed by blending a surface-functionalized montmorillonite (MMT) clay using 3-aminopropyltriethoxysilane (APTES). Polymeric matrix used in this study was obtained by mixing bis phenol-A, aniline and formaldehyde and heating at 150°C. Addition of 7.5 weight % of MMT clay functionalized with APTES formed a composite when heated with the precursors of benzoxazine polymer, forming composites (FeMMT.APTES@BXP3). The structural features of surface-modified clay, benzoxazine polymer and their composites were confirmed through X-ray diffraction, Fourier transform infrared, Field Emission Scanning Elecron Microscope (FESEM), Energy Dispersive X-ray Analysis(EDAX) and elemental mapping studies. Thermal characteristics of the FeMMT.APTES@BXP3 revealed a remarkable thermal stability and retained higher solid mass (63.88%) when subjected to thermogravimetric analysis. Degradation ability of polymer and their composites was also assessed through differential thermogravimetric analysis. Promising hardness features of the polymeric composites were explored by performing Rockwell hardness (RHN) tests. The FeMMT.APTES@BXP3 specimen displayed the RHN as 79 in comparison to all other obtained composites. The composites prepared through this facile method may find remarkable applications in automobile components manufacturing and in high temperature appliances.

中文翻译：

表面改性蒙脱土原位聚合得到的聚苯并恶嗪的热力学性能研究

使用原位方法获得的苯并恶嗪聚合物 (BXP) 制备了一类新型聚合物复合材料，然后使用 3-氨基丙基三乙氧基硅烷 (APTES) 混合表面功能化的蒙脱土 (MMT) 粘土。本研究中使用的聚合物基质是通过混合双酚 A、苯胺和甲醛并在 150°C 下加热获得的。当与苯并恶嗪聚合物的前体一起加热时，添加 7.5 重量％的用 APTES 功能化的 MMT 粘土形成复合材料，形成复合材料 (FeMMT.APTES@BXP3)。通过X射线衍射、傅里叶变换红外、场发射扫描电子显微镜（FESEM）、能量色散X射线分析（EDAX）和元素映射研究证实了表面改性粘土、苯并恶嗪聚合物及其复合材料的结构特征。FeMMT的热特性。当进行热重分析时，APTES@BXP3 显示出显着的热稳定性并保留了更高的固体质量 (63.88%)。还通过差示热重分析评估了聚合物及其复合材料的降解能力。通过进行洛氏硬度 (RHN) 测试，探索了聚合物复合材料的有希望的硬度特征。与所有其他获得的复合材料相比，FeMMT.APTES@BXP3 样品的 RHN 为 79。通过这种简便方法制备的复合材料可能会在汽车零部件制造和高温电器中得到显着应用。还通过差示热重分析评估了聚合物及其复合材料的降解能力。通过进行洛氏硬度 (RHN) 测试，探索了聚合物复合材料的有希望的硬度特征。与所有其他获得的复合材料相比，FeMMT.APTES@BXP3 样品的 RHN 为 79。通过这种简便方法制备的复合材料可能会在汽车零部件制造和高温电器中得到显着应用。还通过差示热重分析评估了聚合物及其复合材料的降解能力。通过进行洛氏硬度 (RHN) 测试，探索了聚合物复合材料的有希望的硬度特征。与所有其他获得的复合材料相比，FeMMT.APTES@BXP3 样品的 RHN 为 79。通过这种简便方法制备的复合材料可能会在汽车零部件制造和高温电器中得到显着应用。

更新日期：2022-06-13

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