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首页> 外文期刊>Journal of Applied Polymer Science >Iodine diffusion during iodine-vapor curing and its effects on the morphology of polycarbosilane/silicon carbide fibers
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Iodine diffusion during iodine-vapor curing and its effects on the morphology of polycarbosilane/silicon carbide fibers

机译：碘蒸气固化过程中的碘扩散及其对聚碳硅烷/碳化硅纤维形态的影响

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摘要

Iodine-vapor curing is used to produce continuous SiC fibers from polycarbosilane (PCS), but attempts to limit the uptake of oxygen during the curing process result in SiC fibers with different morphologies and pore types. The cause of this distinct transformation in the morphology of the fibers is determined in this study by tracing the distribution of iodine in PCS fibers cured either at a set temperature or for a given period. The results reveal that the final morphology of the fibers is dependent on the degree of iodine diffusion, or on the extent of their cross-linked area. Using this knowledge, fibers with three distinct morphologies are produced by controlling the curing conditions. Optimization of this curing process is shown to inhibit the formation of pores and retard the incorporation of oxygen, while still allowing the fibers to retain their cylindrical shape. (C) 2015 Wiley Periodicals, Inc.
机译：碘蒸气固化用于从聚碳硅烷（PCS）生产连续的SiC纤维，但是尝试限制固化过程中氧气的吸收会导致SiC纤维具有不同的形态和孔类型。在这项研究中，通过追踪在设定温度或给定时间固化的PCS纤维中碘的分布，确定了纤维形态发生明显变化的原因。结果表明，纤维的最终形态取决于碘的扩散程度或交联区域的程度。利用这些知识，可以通过控制固化条件来生产具有三种不同形态的纤维。已表明对该固化过程的优化可抑制孔的形成并阻止氧气的引入，同时仍使纤维保持其圆柱形状。 （C）2015威利期刊公司

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