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Counterflow flames of ultrahigh-molecular-weight polyethylene with and without triphenylphosphate

机译：有和没有磷酸三苯酯的超高分子量聚乙烯的逆流火焰

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摘要

To study the mechanism of flame retardancy, counter-flow flames of air and ultrahigh-molecular-weight polyethylene (UHMWPE) with triphenylphosphate (TPP) added, and also without it, were studied at atmospheric pressure. Burning rates were measured. Also the thermal and chemical structure of these counter-flow flames (with and without TPP added) was investigated. The concentrations of the heavy products from the polymer's thermal degradation were measured by sampling the flame at 0.8 mm from the polymer's surface. Temperature profiles in both the flame and the condensed phase were measured, as well as the temperature of the polymer's burning surface, the concentration profiles of 8 species (N-2, O-2, CO2, CO, H2O, C3H6, C4H6, C6H6) and finally the concentration profile for a hypothetical species, whose molecular weight was the average of more than 50 hydrocarbons containing C-7-C-25. The effect of adding TPP to UHMWPE on all the above characteristics indicates that TPP changes what is occurring in both the condensed phase and in the flame. Chromatography and FUR spectroscopy revealed the formation of phosphorus-containing compounds (phosphates, ethers, and carbonates) on the surface of the burning polymer. Elemental analysis showed half the TPP additive remains in the condensed phase and half goes into the flame. Adding 5 wt% of TPP to UHMWPE reduced the burning rate; also the composition of the heavy products from the destruction of this polyethylene was changed markedly by the additive. In fact, the maximum in the distribution of heavy hydrocarbons shifted towards lighter masses. All these facts indicate that TPP does have a real effect in the condensed phase. However, the lowering of the polymer's flammability was ascribed to the effect of TPP on gas-phase processes, as manifested by: a widening of the flame front, a decrease in the maximum flame temperature and a reduction of the extinction strain rate. Overall, these observations do indicate that TPP (a retardant of hydrocarbon flames) reduces the flammability of UHMWPE by a gas-phase mechanism. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：为了研究阻燃机理，在大气压力下研究了空气和添加了磷酸三苯酯（TPP）的超高分子量聚乙烯（UHMWPE）的逆流火焰。测量燃烧速率。还研究了这些逆流火焰（添加和不添加TPP）的热和化学结构。通过从距聚合物表面0.8 mm处的火焰取样来测量来自聚合物热降解的重产物的浓度。测量了火焰和冷凝相中的温度分布图，以及聚合物燃烧表面的温度，以及8种物质（N-2，O-2，CO2，CO，H2O，C3H6，C4H6，C6H6）的浓度分布图），最后是一个假设物种的浓度曲线，该物种的分子量是50多种含C-7-C-25烃的平均值。将TPP添加到UHMWPE的所有上述特性的影响表明，TPP改变了冷凝相和火焰中发生的变化。色谱和FUR光谱显示在燃烧的聚合物表面上形成了含磷化合物（磷酸盐，醚和碳酸盐）。元素分析表明，TPP添加剂的一半保留在冷凝相中，另一半进入火焰中。向UHMWPE中添加5 wt％的TPP降低了燃烧速率；该聚乙烯的破坏也使重产物的组成显着改变。实际上，重烃分布的最大值向较轻的质量转移。所有这些事实表明，TPP在浓缩阶段确实具有真正的作用。然而，聚合物可燃性的降低归因于TPP对气相过程的影响，表现为：火焰前沿变宽，最高火焰温度降低和消光应变速率降低。总体而言，这些观察结果确实表明，TPP（一种碳氢化合物阻燃剂）通过气相机理降低了UHMWPE的可燃性。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

著录项

  • 来源
    《Combustion and Flame》 |2016年第7期|261-271|共11页
  • 作者

    Korobeinichev O. P.; Gonchikzhapov M. B.; Paletsky A. A.; Tereshchenko A. G.; Shundrina I. K.; Kuibida L. V.; Shmakov A. G.; Hu Y.;

  • 作者单位

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia;

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia|Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia;

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia;

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia;

    Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia|Novosibirsk Organ Chem Inst, Lavrentiev Ave 9, Novosibirsk 630090, Russia;

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia|Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia;

    Voevodsky Inst Chem Kinet & Combust, Inst Skaya Str 3, Novosibirsk 630090, Russia|Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia;

    Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Counterflow flame of polymer; Flame retardancy; Flame structure; Polymer flammability; Phosphorus-containing compounds; Thermal degradation of polymers;

    机译：聚合物逆流火焰;阻燃性;火焰结构;聚合物可燃性;含磷化合物;聚合物的热降解;

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