Tay Yu Shan, Phua Eric Jian Rong, Chen Zhong, Gan Chee Lip
Rolls-Royce@NTU Corporate Laboratory, Nanyang Technological University, 65 Nanyang Drive, North Spine, N3.2-01-36/37, Singapore 637460.
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
ACS Omega. 2022 Sep 7;7(37):32996-33003. doi: 10.1021/acsomega.2c02667. eCollection 2022 Sep 20.
Alumina particles are investigated as a potential catalyst for phthalonitrile polymerization and as a property enhancer. In this work, extensive characterizations were conducted on alumina-filled resorcinol-based phthalonitrile to differentiate between the catalytic effect and the filler effect. Thermal gravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy suggest the occurrence of chemical interaction between alumina fillers and phthalonitrile, which provides an insight into the better performance of alumina-filled phthalonitrile resins. This hypothesis is further supported by the additional Al-N peak observed in the X-ray photoelectron spectroscopy (XPS) analysis when alumina is added to phthalonitrile before curing, as well as the presence of an exothermic peak in the differential scanning calorimetry (DSC) analysis that indicates the catalytic polymerization of phthalonitrile. This catalytic phenomenon observed by the addition of alumina fillers is beneficial for the improvement of the conventionally slow curing process of phthalonitrile and, more importantly, is coupled with observable enhancement of thermomechanical properties of the composite.
氧化铝颗粒作为邻苯二甲腈聚合的潜在催化剂和性能增强剂进行了研究。在这项工作中，对氧化铝填充的间苯二酚基邻苯二甲腈进行了广泛的表征，以区分催化作用和填充作用。热重分析（TGA）和傅里叶变换红外（FTIR）光谱表明氧化铝填料与邻苯二甲腈之间发生了化学相互作用，这为深入了解氧化铝填充的邻苯二甲腈树脂的更好性能提供了依据。当在固化前将氧化铝添加到邻苯二甲腈中时，X射线光电子能谱（XPS）分析中观察到的额外Al-N峰，以及差示扫描量热法（DSC）分析中表明邻苯二甲腈催化聚合的放热峰，进一步支持了这一假设。添加氧化铝填料所观察到的这种催化现象有利于改善邻苯二甲腈传统上缓慢的固化过程，更重要的是，伴随着复合材料热机械性能的明显增强。
