SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANEⅡ.SENSITIZING EFFECT OF LOW MOLECULAR WEIGHT POLYBUTADIENE ON CURING REACTION

XU Yunshu; FU Yibei; HUANG Ruiliang; SUN Ying; HUA Degeng

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SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANEⅡ.SENSITIZING EFFECT OF LOW MOLECULAR WEIGHT POLYBUTADIENE ON CURING REACTION

更新时间：2023-04-07

- SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANEⅡ.SENSITIZING EFFECT OF LOW MOLECULAR WEIGHT POLYBUTADIENE ON CURING REACTION
- Journal of Radiation Research and Radiation Processing Vol. 17, Issue 3, Pages: 129-134(1999)
- 作者机构：
  
  1.中国工程物理研究院核物理与化学所　成都　610003
- 作者简介：
- 基金信息：
  
  the National Science Foundation of China(19875043);the Science Foundation of China Academy of Engineering Physics
- DOI：
  CLC：
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XU Yunshu, FU Yibei, HUANG Ruiliang, et al. SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANEⅡ.SENSITIZING EFFECT OF LOW MOLECULAR WEIGHT POLYBUTADIENE ON CURING REACTION. [J]. Journal of Radiation Research and Radiation Processing 17(3):129-134(1999)
DOI：

XU Yunshu, FU Yibei, HUANG Ruiliang, et al. SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANEⅡ.SENSITIZING EFFECT OF LOW MOLECULAR WEIGHT POLYBUTADIENE ON CURING REACTION. [J]. Journal of Radiation Research and Radiation Processing 17(3):129-134(1999) DOI：

摘要

通过溶液共混的方法将低分子量聚丁二烯（LMWPB）加入聚碳硅烷（PCS）中，用直线加速器产生的能量为9.0MeV的电子束在He气氛中辐照，然后在高温下热解转化为SiC陶瓷。结果表明：添加4.8wt%的LMWPB即能够有效地将PCS的凝胶化剂量从5MGy降低至～0.4MGy。加有LMWPB的PCS，其辐照产物的富里衰变换红外光谱（FTIR）谱与不含LMWPB者相似。用气相色谱法检测到辐照过程中有H,2,和CH,4,析出。LMWPB对辐照产物的热解反应无明显影响，用热重-红外光谱（TG-FTIR）联用技术和气相色谱法检测到热解过程中同样有CH,4,和大量的H,2,析出。在N,2,气流中，将辐照后的PCS/LMWPB试样升温至1200℃，热解后得到有金属光泽的黑色产物，X射线衍射谱图与元素分析结果表明该产物为高纯度的半晶SiC陶瓷。

Abstract

Low molecular weight polybutadiene (LMWPB) was mixed into PCS by solution method,then irradiated in He gas by 9.0MeV electron beam generated by a LINAC. Results showed that just 4.8wt% of LMWPB can drastically lower down the gelling dose from 5 MGy to merely ~0.4 MGy. The chemical structure of irradiated PCS containing LMWPB was similar to that without additives. H,2, and CH,4, were detected by gas chromatography during irradiation. As detected by TG-FTIR couplet analyzing technique and gas chromatography, there were also CH,4, and H,2, released during the pyrolysis process. The addition of LMWPB increased PCS'ceramics yield. Metal like pyrolysis product had been obtained by heating the irradiated samples in N,2, gas to 1200℃. Element analysis and X-ray diffraction analysis verified the pyrolysis product is semi-crystalline SiC ceramics with high purity.

关键词

聚碳硅烷不熔化电子束敏化剂热解碳化硅陶瓷

Keywords

PolycarbosilaneCuringElectron beamSensitizerPyrolysisSilicon carbide ceramics

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