| 卤烃和水合氧化镁对聚丙烯协同阻燃机理 |
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| 引用本文： | 郭金全.卤烃和水合氧化镁对聚丙烯协同阻燃机理[J].厦门大学学报(自然科学版),1989,28(6):613-617. |
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| 作者姓名： | 郭金全 |
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| 作者单位： | 厦门大学化学系 |
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| 摘 要： | 卤烃(尤其溴烃)和水合氧化镁对聚丙烯(PP)具有协同阻燃作用,在含80phr 水合氧化镁的 PP体系中,添加 10 Phr 六溴环十二烷(HBCD),可使氧指数(OI)达到 34％,阻燃性能从 G84 609—84/FV—2 级提高到 GB4 609—84/FV—0级。本文中着重研究其协同阻燃机理,提出了碱性水合氧化镁促进溴烷释出 HBr,HBr可与水合氧化镁分解的氧化镁生成 MgBr_2,后者又与水合氧化镁脱出的水汽作用,重新生成HBr,从而延长HBr在燃烧区域的停滞时间,是产生这种协同阻燃效应的原因。
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| 关 键 词： | 协同阻燃效应 阻燃剂 卤烃 六溴环十二烷 水含氧化镁 聚丙烯 |
The Mechanism of synergistic Flame-Retardant Effect of Halohydrocarbon and Magnesium-Hydrate on Polypropylene |
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| Guo Jinquan.The Mechanism of synergistic Flame-Retardant Effect of Halohydrocarbon and Magnesium-Hydrate on Polypropylene[J].Journal of Xiamen University(Natural Science),1989,28(6):613-617. |
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| Authors: | Guo Jinquan |
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| Institution: | Dept. of Chem. |
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| Abstract: | The halohydrocarbon (especially brominated methans) with magnesium-hydrate has synergistic flame-retardant effect on PP. For example, 10 phr hexabromocyclododecane enables PP containing 80 phr magnesiumhydrate to increase its OI to 34 %, flame-retardant grade of PP-com-ples rises from GB4 609- 84/FV-2 to GB4 609-84/FV-O correspondingly. The mechanism of synergistic flame-retardant effect was studied emphatically. We consider that alkalinous magnesium -hydrate promotes the separation of HBr from brominated methan,HBr reacts with MgO, one of decomposition products of Mg(OH)2,to form MgB2, and the latter reacts with steam,another one of de-compositon products of Mg(OH)2 to form HBr again. Thus stagnant time of HBr at the burning re-gion is prolonged. These are the reasons to produce synergistic flame-retardant effect. |
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| Keywords: | Synergistic flame-retardant effect Fire-retardant Hatohydrocarbon Hexabro-mocyclododecane Magnesium-hydrate Polypropylene |
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