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Highly heat resistant and thermo-oxidatively stable borosilane alkynyl hybrid polymers

机译：高热耐热和热氧化稳定的硼硅烷炔基杂化聚合物

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摘要

A type of boron-silicon containing hybrid polymer with C equivalent to C units (HBS) was prepared, and the effects of three different substituents on the properties of the polymers were studied. The polymers were synthesized with ethynylmagnesium bromide, dichlorosilane and boron fluoride etherate by using a Grignard reagent method. The structures of HBS were characterized by Fourier-transform infrared spectra, proton-NMR (H-1-NMR), C-13-NMR, Si-29-NMR, and gel permeation chromatography. Thermal and oxidative stabilities were studied using differential scanning calorimetry and thermogravimetry analysis, and the crosslinking reaction mechanisms of the HBS are discussed. All the polymers exhibit excellent thermal and oxidation resistance, particularly, HBS-1 with Si-H bonds which was highly heat resistant and showed good thermo-oxidative stability. The temperatures of 5% weight loss (T-d5) were 624 degrees C and 607 degrees C in nitrogen and air, respectively, and the residues at 1000 degrees C were 86.8% and 77.5%, respectively. The thermal and oxidative stabilities of the polymers were attributed to the synergistic effect of boron and silicon elements and the cross linking during hydrosilylation and Diels-Alder reactions.
机译：制备一种含有C单位（HBS）的C的杂种聚合物的硼 - 硅，研究了三种不同取代基对聚合物性质的影响。通过使用GRIGNARD试剂法将聚合物用乙炔氧化铵溴化物，二氯硅烷和氟化硼醚化合成。 HBS的结构特征在于傅里叶变换红外光谱，质子-NMR（H-1-NMR），C-13-NMR，Si-29-NMR和凝胶渗透色谱法。使用差示扫描量热法和热重率分析研究了热和氧化稳定性，并讨论了HBS的交联反应机制。所有聚合物都表现出优异的热和抗氧化性，特别是HBs-1，具有高耐热的Si-H键，并显示出良好的热氧化稳定性。 5％重量损失（T-D5）的温度分别为624℃和607℃，分别为607℃，1000℃的残基分别为86.8％和77.5％。聚合物的热和氧化稳定性归因于硼和硅元件的协同作用以及氢化硅烷化和Diels-Alder反应期间的交联。

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  • 来源
    《RSC Advances》 |2015年第16期|共7页
  • 作者

    Zhou Hua; Zhou Quan; Zhou Qi; Ni Lizhong; Chen Qi;

  • 作者单位

    E China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Minist Educ Shanghai 200237 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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