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Characteristics of polycarbosilanes produced under different synthetic conditions and their influence on SiC fibers: Part I
- Source :
- Ceramics International. 46:5602-5609
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- SiC fibers can be obtained by the spinning, curing, and heat treatment of polycarbosilane (PCS); however, the properties of the PCS precursor must be considered to set the correct spinning conditions. Although many studies have focused on the synthesis conditions, the characterization (in particular, the structural characteristics) of PCS fibers, and the polymer itself has limitations. In this study, PCS was prepared in two steps, and the growth of the polymer with respect to the reaction conditions was analyzed. We found that PCS is formed and grown by the rearrangement and subsequent condensation reactions of polydimethylsilane (PDMS). Further, fiber formation was affected by the reaction temperature, time, and pressure. Three types of PCS were obtained under different synthetic conditions, and they were all characterized. Regardless of the structural similarity of the PCS fibers (based on the spectroscopic analysis), the polymers showed different thermal and rheological properties. Our findings will be important in improving the production of PCS fibers (and subsequent SiC fibers) with finely controlled properties.
- Subjects :
- 010302 applied physics
chemistry.chemical_classification
Reaction conditions
Materials science
Process Chemistry and Technology
02 engineering and technology
Polymer
021001 nanoscience & nanotechnology
Condensation reaction
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Reaction temperature
Chemical engineering
Rheology
chemistry
0103 physical sciences
Materials Chemistry
Ceramics and Composites
0210 nano-technology
Spinning
Curing (chemistry)
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........ae8ec4932897a113f2cee2eae4e48f04