γ射线辐照改性聚碳硅烷提高热解陶瓷产率

程勇; 李小虎; 周路路; 徐甲强; 张文发; 张文礼; 刘伟华; 沈蓉芳; 王谋华

doi:10.11889/j.1000-3436.2016.rrj.34.060401

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γ射线辐照改性聚碳硅烷提高热解陶瓷产率

辐射技术的应用 | 更新时间：2021-12-10

- γ射线辐照改性聚碳硅烷提高热解陶瓷产率
- Improving the ceramics yield of polycarbosilane by γ-rays irradiation
- 辐射研究与辐射工艺学报 2016年34卷第6期
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.上海大学理学院上海 200444
- 作者简介：
  
  [ "程勇, 男, 1993年7月出生, 2010年毕业于山西大学, 现为上海大学化学专业在读硕士研究生", "CHENG Yong (male) was born in July 1993, and received his bachelor degree from Shanxi University in 2010. Now he is a master candidate in chemistry of Shanghai University" ]
  王谋华, 博士, 副研究员, E-mail:wangmouhua@sinap.ac.cn Ph.D. WANG Mouhua, associate professor, E-mail:wangmouhua@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(11575279)
- DOI：10.11889/j.1000-3436.2016.rrj.34.060401
  中图分类号：
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程勇, 李小虎, 周路路, 等. γ射线辐照改性聚碳硅烷提高热解陶瓷产率[J]. 辐射研究与辐射工艺学报, 2016,34(6):060401-6.

Yong CHENG, Xiaohu LI, Lulu ZHOU, et al. Improving the ceramics yield of polycarbosilane by γ-rays irradiation[J]. Journal of Radiation Research and Radiation Processing, 2016,34(6):060401-6.
程勇, 李小虎, 周路路, 等. γ射线辐照改性聚碳硅烷提高热解陶瓷产率[J]. 辐射研究与辐射工艺学报, 2016,34(6):060401-6. DOI： 10.11889/j.1000-3436.2016.rrj.34.060401.

Yong CHENG, Xiaohu LI, Lulu ZHOU, et al. Improving the ceramics yield of polycarbosilane by γ-rays irradiation[J]. Journal of Radiation Research and Radiation Processing, 2016,34(6):060401-6. DOI： 10.11889/j.1000-3436.2016.rrj.34.060401.

摘要

在N,2,气中用γ射线对聚碳硅烷（Polycarbosilane，PCS）进行辐照，利用傅里叶红外光谱分析、凝胶渗透色谱分析和热重分析等手段研究了不同吸收剂量下PCS的化学结构、分子量和热分解特性。结果显示，经γ射线辐照处理后的PCS轻微失重，分子量和软化点随着吸收剂量的增加而增加，说明PCS经辐照后发生了分子间的交联反应。红外分析表明，PCS的交联主要是通过Si-H键和C-H键的断裂产生新的Si-C-Si结构实现的。热重分析表明，PCS热解为碳化硅的陶瓷产率随吸收剂量的增加显著升高，剂量达到1.5 MGy后PCS样品的陶瓷产率基本提高到稳定值，此时，陶瓷产率从改性前的61.9%提高到80.0%。

Abstract

Polycarbosilane (PCS) was irradiated by γ-rays in N,2, atmosphere. The chemical structure, molecular weight, thermal decomposition characteristics of the irradiated PCS were investigated by Fourier transform infrared spectroscopic analysis, gel permeation chromatographic analysis and thermogravimetric analysis, respectively. The results showed that a slight weight loss of PCS was found after γ-rays irradiation, both the molecular weight and softening point of PCS increased with the absorbed dose. These results indicated that crosslinking reactions occurred between PCS molecules induced by γ-rays irradiation. According to the results by Fourier transform infrared spectroscopic analysis, the crosslinking site of PCS was Si-C-Si structure which was formed by combining of Si-H with C-H structure. The ceramic yield of irradiated PCS increased significantly with its absorbed dose. When the absorbed dose reached 1.5 MGy, the ceramic yield increased from 61.9% of non-irradiated sample to a saturated value of 80.0%.

关键词

聚碳硅烷γ-rays辐照交联陶瓷产率

Keywords

Polycarbosilaneγ-rays irradiationCrosslinkingCeramic yield

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