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首页> 外文期刊>Journal of Applied Polymer Science >Rheokinetic studies and compressive response of high performance polybenzoxazine syntactic foams
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Rheokinetic studies and compressive response of high performance polybenzoxazine syntactic foams

机译：高效聚苯苯并恶嗪语法泡沫的流因因研究及压缩反应

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Polybenzoxazines are finding increasing usage in demanding applications where high temperature stability is required, especially in the field of aerospace. In this work, thermally stable bisphenol F-based polybenzoxazine [poly(BF-a)] syntactic foams containing varying volume fractions (30-60%) of hollow glass microballoons (HGMs) were prepared and their mechanical response in the quasi-static regime was established. The effect of introducing glass microballoons on the curing profile of benzoxazine resin was studied using both nonisothermal differential scanning calorimetry and rheometry. Temperature-sweep experiments were performed to arrive at the optimal processing window of the benzoxazine-glass microballoons formulations, particularly in terms of viscosity, gelation temperature, and time. Thermally accelerated ring-opening polymerization of the benzoxazine resin led to complete curing of the syntactic foam formulations, as assessed by calorimetric studies. The thermal degradation behavior of the poly(BF-a)/HGM was studied using thermogravimetric analysis. As expected, the density of the syntactic foam specimens decreased with increasing microballoon content. Maximal increase in the specific compressive properties of the poly(BF-a)/HGM samples was observed in formulations containing 40% volume fraction of glass microballoons. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47234.
机译：聚苯细胞在需要需要高温稳定性的苛刻应用中，尤其是在航空航天领域的苛刻应用中的越来越多的应用。在这项工作中，制备热稳定的双酚F基聚苯胺[聚（BF-A）]制备含有不同体积分数（30-60％）中空玻璃微量玻璃（HGMS）的句法泡沫及其在准静态方案中的机械反应建立了。研究了使用非等热差分扫描量热法和流变学研究了引入玻璃微旋钮对苯并恶嗪树脂固化曲线的影响。进行温度扫描实验以达到苯并恶嗪 - 玻璃微量化制剂的最佳处理窗口，特别是在粘度，凝胶化温度和时间方面。苯并恶嗪树脂的热加速开环聚合导致句法泡沫配方的固化，如热量研究评估。使用热重分析研究了聚（BF-A）/ HGM的热降解行为。如预期，句法泡沫样品的密度随着微量含量的增加而降低。在含有40％体积分数的玻璃微旋钮的制剂中观察到聚（BF-A）/ HGM样品的比压缩性质的最大增加。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47234。

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