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首页> 外文期刊>Journal of Applied Polymer Science >Curing kinetics and curing process of phenolic impregnated carbon ablator
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Curing kinetics and curing process of phenolic impregnated carbon ablator

机译：酚醛浸碳烧蚀器的固化动力学和固化过程

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摘要

Phenolic impregnated carbon ablator (PICA), which is composed of the phenolic resin (PR) and carbon fiber, is of particular interest to researchers in the aerospace field. In this work, PICA was prepared by the double-stage isothermal heating curing. Then, the curing kinetics of boron-modified phenolic resin (BPR) was investigated by non-isothermal differential scanning calorimetry method in order to optimize the curing temperature of BPR. Further, the effect of the heating rate during curing process on the compressive strength of PICA was discussed in detail. The experimental data show that the curing of BPR needs more energy so that the curing temperature of BPR under different condition is higher than that of virgin PR. Notably, with the increasing heating rate during the curing process, the micro-cracks increase and the compressive strength of PICA decreases. Once the heating rate exceeds a critical value, the micro-cracks no longer increase and the heating rate has insignificant effect on the compressive strength. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45434.
机译：由酚醛树脂（PR）和碳纤维组成的酚醛浸渍的碳烧蚀器（PICA）对航空航天领域的研究人员特别感兴趣。在这项工作中，通过双级等温加热固化制备了PICA。然后，通过非等温差扫描量热法研究了硼改性酚醛树脂（BPR）的固化动力学，以优化BPR的固化温度。此外，详细讨论了在固化过程中加热速率对PICA的抗压强度的影响。实验数据表明，BPR的固化需要更多的能量，使得BPR在不同条件下的固化温度高于Virgin Pr的固化温度。值得注意的是，随着在固化过程中增加的加热速率，微裂纹增加和PICA的抗压强度降低。一旦加热速率超过临界值，微裂缝不再增加，加热速率对抗压强度的影响微不足道。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,45434。

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