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首页> 外文期刊>Polymers for advanced technologies >Simultaneously improving the thermal conductive and flame retardant performance for epoxy resins thermosets by constructing core‐shell‐brush structure and distributing of MWCNTs in brush intervals
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Simultaneously improving the thermal conductive and flame retardant performance for epoxy resins thermosets by constructing core‐shell‐brush structure and distributing of MWCNTs in brush intervals

机译：通过构建芯壳刷结构和刷间隔内MWCNT来同时提高环氧树脂树脂热固性热试火和阻燃性能

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摘要

> Fire safety and thermal dissipation performance of epoxy resins thermosets were critical for its application in key fields such as electronic devices. The simultaneous improvement of flame retardant and thermal conductivity properties were still a challenge. Herein, ammonium polyphosphate (APP) was firstly encapsulated with 5‐wt% epoxy resins based on APP and then surface grafted with polyurethane polymer chain, and the resulting APP with core‐shell‐brush structure was constructed. Finally, the multiwalled carbon nanotube (MWCNT) was assembled in the intervals of polymer brush on APP surface, and the prepared filler was defined as MF‐APP. Its chemical structure and morphologies were characterized and confirmed. The wettability of MF‐APP was evaluated by water contact angles tests (WCA) and MF‐APP exhibited hydrophobic property with the WCA of 138°. When 9‐wt% MF‐APP was incorporated into EP thermosets, the thermal conductive value of EP/MF‐APP achieved 1.02 Wm ?1 K ?1 , and the MWCNTs concentration was only 1.8 wt% in thermosets. Compared with the previous work, the prepared EP/MF‐APP thermosets exhibited outstanding thermal conductive efficiency because of the homogeneously distribution of MWCNTs. Moreover, the samples fulfilled UL‐94 V‐0 grade during vertical burning tests with the limiting oxygen index of 30.8%. As a result, the thermal conductivity and flame retardancy of EP thermosets were simultaneously enhanced with a relatively low addition amount of MF‐APP, which would bring more chance for wider application of EP thermosets in key fields.
机译： > 环氧树脂树脂热固性的防火和热耗散性能对于其在电子设备等关键领域中的应用至关重要。同时改善阻燃剂和导热性能仍然是一个挑战。在此，首先将多磷酸铵（APP）包封在基于APP的5-WT％的环氧树脂中，然后用聚氨酯聚合物链接枝的表面，并构建了具有核 - 壳刷结构的所得的应用。最后，在APP表面上的聚合物刷的间隔组装多壁碳纳米管（MWCNT），制备的填料定义为MF-APP。其化学结构和形态的特征和形态学。通过水接触角度测试（WCA）和MF-APP评估MF-APP的润湿性，并且使用WCA为138°的疏水性。当9-WT％MF-APP被纳入EP热固性孔时，EP / MF应用的导热值达到1.02 WM ？1 K. ？1 并且热固性浓度的MWCNTs浓度仅为1.8wt％。与以前的工作相比，所需的EP / MF-APP热固性件由于MWCNT的均匀分布而表现出出色的导热效率。此外，样品在垂直燃烧试验期间满足UL-94 V-0等级，限制氧指数为30.8％。结果，EP热固性能的导热性和阻燃性同时增强了相对较低的MF应用程序，这将带来更多机会在关键领域中更广泛地应用EP热固性。

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  • 来源
    《Polymers for advanced technologies》 |2020年第3期|共13页
  • 作者

    Leng Yang; Xu Miaojun; Sun Yue; Li Bin;

  • 作者单位

    Key Lab of Bio‐based Material Science and Technology Ministry of Education College of Materials Science and EngineeringNortheast Forestry UniversityHarbin China;

    Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin China;

    Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin China;

    Key Lab of Bio‐based Material Science and Technology Ministry of Education College of Materials Science and EngineeringNortheast Forestry UniversityHarbin China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    core‐shell‐brush structure; epoxy resin; flame retardancy; thermal conductivity;

    机译：核心壳刷结构;环氧树脂;阻燃性;导热率;

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