Phthalide cardo chain extended imine skeletal linked maleimido end capped nanotitania reinforced novel polybenzoxazine (nTiO2/PBZ) hybrid nanocomposites

IF 1.8 4区 化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2023-03-14 DOI:10.1177/09540083231162516
V. Arivalagan, M. Meera, Devaraj Stephen, M. Soundarrajan, . SGGunasekaran
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Abstract

A new class of nanotitania reinforced polybenzoxazine (nTiO2/PBZ) hybrid nanocomposites was synthesized using newly designed phthalide cardo chain extended imine skeletal linked maleimido end capped polybenzoxazine (PHM-PBZ) and nTiO2 through in-situ sol-gel method. The formation of hybrid nanocomposites was confirmed by NMR and FT-IR spectra. The structurally stable nTiO2 present in the nTiO2/PBZ hybrids accounted their exceptional thermal stability and good char yield. The restricted motion of flexible polymeric chain resulted from the inclusion of nTiO2 in the PBZ system increased the glass transition temperature (T g ) to a higher percentage than that of neat PBZ system. With the successive enhancement in the incorporation of nTiO2, the synthesized nanocomposites exhibited better thermal stability, higher flame retardancy and lesser water absorption behaviour than the of neat PBZ. The sequential increments in the loading level of nTiO2 onto the PBZ matrices caused the lower value of dielectric constant than that of neat PBZ. The homogeneity and successful dispersion of the nTiO2 fillers in the PBZ matrix were ascertained from the strong fluorescent emissions observed in the wavelength range of 300–550 nm through optical studies. Scanning electron microscope and transmission electron microscopic micrographs evidenced the successful incorporation of nTiO2 as can be seen from the different morphology at the nanoscale level in the PBZ matrix. This kind of structurally designed nTiO2/PBZ nanocomposites may find multifaceted applications in the form of adhesives, encapsulants, matrices and sealants and in the fields of automobile and microelectronics applications for better performance and longevity.
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邻苯二甲酸链延伸亚胺骨架连接马来胺端盖纳米二氧化钛增强新型聚苯并恶嗪(nTiO2/PBZ)杂化纳米复合材料
以新设计的邻苯二甲酸酯-卡多链亚胺骨架连接马来酰亚胺端基封端的聚苯并恶嗪(PHM-PBZ)和纳米二氧化钛为原料,采用原位溶胶-凝胶法合成了一类新型纳米二氧化钛增强聚苯并恶津(nTiO2/PBZ)杂化纳米复合材料。通过NMR和FT-IR光谱证实了杂化纳米复合材料的形成。存在于nTiO2/PBZ杂化物中的结构稳定的nTiO2解释了它们优异的热稳定性和良好的焦炭产率。由于在PBZ体系中包含nTiO2,柔性聚合物链的受限运动使玻璃化转变温度(Tg)比纯PBZ体系提高了更高的百分比。随着nTiO2掺入量的不断增加,合成的纳米复合材料表现出比纯PBZ更好的热稳定性、更高的阻燃性和更小的吸水性。nTiO2在PBZ基质上的负载水平的顺序增加导致介电常数的值低于纯PBZ的介电常数。通过光学研究,从300–550 nm波长范围内观察到的强荧光发射中确定了nTiO2填料在PBZ基体中的均匀性和成功分散性。扫描电子显微镜和透射电子显微镜显微照片证明了nTiO2的成功掺入,这可以从PBZ基质中纳米级的不同形态中看出。这种结构设计的nTiO2/PBZ纳米复合材料可以以粘合剂、密封剂、基质和密封剂的形式在汽车和微电子应用领域找到多方面的应用,以获得更好的性能和寿命。
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来源期刊
High Performance Polymers
High Performance Polymers 化学-高分子科学
CiteScore
4.20
自引率
14.30%
发文量
106
审稿时长
1.2 months
期刊介绍: Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.
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