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首页> 外文期刊>Journal of Materials Science >Preparation of novel UV-cured methacrylate hybrid materials with high thermal stability via thiol-ene photopolymerization
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Preparation of novel UV-cured methacrylate hybrid materials with high thermal stability via thiol-ene photopolymerization

机译：通过硫醇 - 烯光聚合制备具有高热稳定性的新型UV固化甲基丙烯酸丙烯酸酯杂交材料

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摘要

Methacryloxypropyl-polyhedral oligomeric silsesquioxane (MAP-POSS) was photopolymerized with the tri- or tetra-functional thiol monomer in different stoichiometry. A novel inorganic-organic methacrylate hybrid material with highly cross-linked network and high performance was synthesized by UV-initiated thiol-ene click chemistry. SEM-EDAX images and XRD diffractograms showed that no agglomeration of MAP-POSS was observed, indicating MAP-POSS dispersed uniformly in the hybrid materials. Real-time FTIR was employed to monitor the conversion of thiol and methacrylate as a function of irradiation time, and the results revealed that highly thiolated monomer could promote the conversion of methacrylate effectively because of stronger chain propagation capability. The TGA indicated that the hybrid materials had high thermal stability of which the onset decomposition temperature rose to 350 degrees C, approximately 50 degrees C higher than that of the traditional UV-cured epoxy acrylate/triethylene glycol dimethacrylate (EA/TEGDMA, 70:30w/w) resin. The highest glass transition temperature (T-g) of the hybrid materials was 76.2 degrees C. Compared with traditional EA/TEGDMA resins, the novel hybrid materials consisted of MAP-POSS had fast curing rate, high mechanical properties and thermal stability which made the wider practical applications of UV-cured hybrid materials feasible.
机译：甲基丙烯酰氧基丙基 - 多面体低聚体二氧化硅烷（MAP-POLS）用不同化学计量中的三官能硫醇单体光聚合。通过UV引发的硫醇-NE键合成具有高度交联网络和高性能的新型无机 - 有机甲基丙烯酸丙烯酸酯杂化材料。 SEM-EDAX图像和XRD衍射图表明，没有观察到MAP-POSS的附聚，表明均匀地分散在混合材料中。使用实时FTIR以监测硫醇和甲基丙烯酸甲酯作为照射时间的函数的转化，结果表明，由于链繁殖能力较强，高硫醇化单体可以促进甲基丙烯酸酯的转化。 TGA表明，杂化材料具有高热稳定性，其发病分解温度升至350℃，大约50℃高于传统的紫外线固化环氧丙烯酸酯/三乙二醇二甲基丙烯酸酯（EA / TEGDMA，70：30W） / w）树脂。杂交材料的最高玻璃化转变温度（Tg）为76.2℃。与传统的EA / TEGDMA树脂相比，新型混合材料包括Map-Poss，具有快速固化率，高机械性能和热稳定性，使得更广泛的实用性UV固化混合材料的应用可行。

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  • 来源
    《Journal of Materials Science》 |2019年第7期|共21页
  • 作者

    Zhang Jiancheng; Li Liping; Guo Ruilu; Zhou Haorui; Li Zhiming; Chen Guangxin; Zhou Zheng; Li Qifang;

  • 作者单位

    Beijing Univ Chem Technol Minist Educ Key Lab Carbon Fiber &

    Funct Polymers Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci &

    Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci &

    Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci &

    Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci &

    Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Minist Educ Key Lab Carbon Fiber &

    Funct Polymers Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Minist Educ Key Lab Carbon Fiber &

    Funct Polymers Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci &

    Engn Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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