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Curing properties of high-Ortho phenol-formaldehyde resins with co-catalysis

机译：高邻苯酚 - 甲醛树脂与共催化的固化性能

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摘要

In this study, sodium carbonate (Na2CO3) was used as a catalyst to prepare high-ortho phenol-formaldehyde (HOPF) resin, and ester and carbonate curing accelerators were used to increase its curing rate. The physicochemical properties of the prepared resins and the mechanism of curing acceleration were investigated. The results showed that, with the addition of Na2CO3, the ortho/para ratio of methylol groups increased from 7.257 to 27.800. The gel time of the cure-accelerated HOPF resins decreased from 620 to 240 s as compared with PF resin. The bonding strength of plywood bonded with the cure-accelerated HOPF resins were all above 0.70 MPa. The curing acceleration was caused by the carbonate ions rather than the metal ions, and a temporary incorporation mechanism apparently occurred for the ester accelerators. The prepared phenolic resin had fast curing rate, low curing temperature, high thermal stability, and favorable mechanical performance, which has potential for industry applications. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47229.
机译：在该研究中，碳酸钠（Na 2 CO 3）用作制备高邻酚醛 - 甲醛（HOPF）树脂的催化剂，并使用酯和碳酸盐固化促进剂来提高其固化率。研究了制备树脂的物理化学性质和固化加速机理。结果表明，随着Na 2 CO 3的加入，甲基醇基团的邻/律比例从7.257增加到27.800。与PF树脂相比，固化加速跳水树脂的凝胶时间从620℃降低。与固化加速跳蚤树脂键合的胶合板的粘合强度全部高于0.70MPa。固化加速是由碳酸盐离子而不是金属离子引起的，并且酯促进剂明显地发生临时掺入机制。制备的酚醛树脂具有快速固化速率，低固化温度，高热稳定性和有利的机械性能，具有工业应用的潜力。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47229。

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  • 来源
    《Journal of Applied Polymer Science》 |2019年第12期|共9页
  • 作者

    Li Jiongjiong; Zhu Wenjie; Zhang Jizhi; Zhang Shifeng; Gao Qiang; Li Jianzhang; Zhang Wei;

  • 作者单位

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

    Beijing Forestry Univ Minist Educ MOE Key Lab Wood Mat Sci &

    Applicat Beijing 100083 Peoples R China;

  • 收录信息
  • 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

    adhesives; catalysts; crosslinking; thermosets;

    机译：粘合剂;催化剂;交联;热固性胶片;

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