聚碳硅烷 的英文怎麼說
中文拼音 [jùtànguīwán]
聚碳硅烷
英文
pcs-
Modulation of spinnable polycarbosilane with a high melting point via fractional precipitation
沉澱分級法調制紡絲級高熔點聚碳硅烷The research on the effect of liquid - liquid transition of polyacrylate on crystallization - melting of pdms indicates that above the melting temperature of pdms, pdms is reinforced by a special mutual action between p - electron in carbonyl of polyacrylate and 3d orbit in si atom of pdms, while below the temperature, the pdms crystal is lessened, which can not completely remove the crystal of pdms. however, it is the crystallization behavior of pdms that results in its most segments relaxation being restrained
研究聚丙烯酸酯液一液轉變對聚二甲基硅氧烷結晶一熔融影響的結果表明：碳基碳原子上p電子與出原於中3d軌道相互作用，在聚h甲基硅氧烷熔融轉變溫度以上，對其有分子增強作用；在聚二甲基硅氧烷熔融轉變溫度以下，霎對其有降低結晶度的作用，但不能消除結晶現象。Focusing on serious damage of carbon fibers in ceramic matrix composites ( cmcs ) prepared by precursor infiltration pyrolysis ( pip ), and with emphasis on carbon fiber reinforced silicon carbide composites ( cf / sic ) derived from polycarbosilane ( pcs ), the influences of raw materials ( including carbon fibers and precursors, etc. ) and preparing conditions on carbon fiber damage during the preparation of cf / sic composites were investigated systemically. pyrolysis process, fiber - matrix interface and carbon fiber damage process were observed by sem, tem, ir, xrd, xps and tq etc. the characterization method of carbon fiber damage degree was established and the models for carbon fiber damage mechanism were also established. the carbon fiber coatings and unidirectional cf / sic composites with coated carbon fibers were prepared and studied
本文針對先驅體浸漬裂解工藝制備陶瓷基復合材料過程中碳纖維損傷嚴重的問題，以聚碳硅烷（ pcs ）制備cf / sic復合材料為重點，採用sem 、 tem 、 ir 、 xrd 、 xps 、 tg等表徵手段，分析了先驅體裂解過程、纖維基體界面和碳纖維損傷過程，系統地研究了原料（碳纖維、先驅體等）和制備工藝條件等在cf / sic復合材料制備過程中對碳纖維損傷的影響，建立了碳纖維損傷程度的表徵方法和損傷機理模型，制備了纖維表面塗層並利用塗層碳纖維制備了單向cf / sic復合材料。
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