Melt-spinning and the thermal decomposition of mixed polymers containing polysilsesquioxane and polycarbosilane
Melt-spinning and the thermal decomposition of mixed polymers containing polysilsesquioxane and polycarbosilane
复制标题
聚倍半硅氧烷和聚碳硅烷混合聚合物的熔融纺丝和热分解
DOI：
10.1007/s10853-022-07103-0
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发表时间：
2022
影响因子：
4.5
通讯作者：
Hotta Mikinori
中科院分区：
文献类型：
--
作者：
Kita Ken’ichiro;Fukushima Manabu;Hotta Mikinori
我们尝试了熔融纺丝，并研究了聚倍半硅氧烷和聚碳硅烷的混合物的相容性和热分解性能，目的是制造低档碳化硅纤维或碳化硅纤维。为了提高初生纤维的强度，同时提高长碳化硅纤维的成品率，选择了制备方法。尽管聚倍半硅氧烷的加入增加了共混聚合物的粘度，但在制备过程中可以通过加入柔软剂来熔融纺丝。通过将聚倍半硅氧烷和聚碳硅烷加热到600℃，成功地实现了聚倍半硅氧烷和聚碳硅烷之间的交联。因此，与纯聚碳硅烷相比，混合聚合物的产率更高。从混合聚合物获得的初生纤维的拉伸强度大约是使用相同方法从纯PCS获得的纤维的10倍。因此，我们能够证实，共混倍半硅氧烷有效地提高了初生纤维的拉伸强度，从而生成了长的碳化硅纤维。
We attempted melt-spinning and investigated the compatibility and thermal decomposition of a mixture comprising polysilsesquioxane and polycarbosilane for the purpose of manufacturing low grade silicon carbide (SiC) fibers or silicon oxycarbide fibers. The fabrication approach was selected to reinforce the strength of the as-spun fibers, as well as increase the yield of long SiC fibers. Although the addition of polysilsesquioxane increased the viscosity of the mixed polymer, the mixed polymer could be melt-spun by incorporating a softener during the fabrication process. Cross-linking between polysilsesquioxane and polycarbosilane was successfully accomplished by heating them to 600 °C. Consequently, the mixed polymer demonstrated a higher yield in comparison to pure polycarbosilane. The as-spun fibers derived from the mixed polymer had a tensile strength approximately 10 times that of the fibers derived from pure PCS using an identical approach. Thus, we were able to confirm that blending polysilsesquioxane effectively reinforced the tensile strength of the as-spun fibers to generate long SiC fibers.