• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Preparation and mechanism study of intrinsic hard segment flame-retardant polyurethane foam
【24h】

Preparation and mechanism study of intrinsic hard segment flame-retardant polyurethane foam

机译：内在硬段阻燃聚氨酯泡沫的制备及机制研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The hard segment of polyurethane foam (PUF) plays a special role in degradation and carbonization. In this work, flame-retardant hard segment (HSFR) used to promote fire resistance was synthesized successfully. The limiting oxygen index (LOI), vertical combustion, and micro-combustion calorimetry tests indicated the flame retardancy of the foam was elevated by introducing HSFR. When HSFR with an addition of 60 phr, the LOI value was increased from 17.0 to 25.5%, UL-94 reached V-0 rating, the peak heat release rate (p-HRR) and total heat release (THR) decreased by 63.9% and 10.0%, respectively. In addition, the compressive strength of HSFR-60 increased by five times. Further, the flame-retardant mechanism of HSFR was proposed. In vapor phase, HSFR could generate PO and PO2, which combine with flammable free radical and hinder segment decomposition. In condensed phase, HSFR could promote the dehydration and carbonization of chain and the formation of dense and graphitized char. This article provides a practical method for the preparation of green, highly effective, and durable flame-retardant PUF.
机译：聚氨酯泡沫塑料（PUF）的硬段在降解和碳化中起着特殊的作用。本论文成功合成了用于提高耐火性能的阻燃硬段（HSFR）。极限氧指数（LOI）、垂直燃烧和微燃烧量热测试表明，HSFR的引入提高了泡沫的阻燃性。当添加60份HSFR时，LOI值从17.0增加到25.5%，UL-94达到V-0等级，峰值热释放率（p-HRR）和总热释放率（THR）分别降低63.9%和10.0%。此外，HSFR-60的抗压强度提高了五倍。提出了HSFR的阻燃机理。在气相，HSFR可生成PO和PO2，它们与易燃自由基结合，阻碍片段分解。在凝聚相，HSFR可以促进链的脱水和碳化，形成致密的石墨化半焦。本文为制备绿色、高效、耐用的阻燃PUF提供了一种实用的方法。

著录项

  • 来源
    《Journal of Applied Polymer Science》 |2021年第10期|共16页
  • 作者

    Luo Yinfu; Miao Zongnan; Sun Tong; Zou Huawei; Liang Mei; Zhou Shengtai; Chen Yang;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan 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

    degradation; flame retardance; foams; thermal properties;

    机译：降解;阻燃性;泡沫;热性质;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号