Highly flame-retardant bio-based polyurethanes using novel reactive polyols
Highly flame-retardant bio-based polyurethanes using novel reactive polyols
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DOI：
10.1002/app.46027
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发表时间：
2018-03-20
影响因子：
3
通讯作者：
Gupta, Ram K.
中科院分区：
文献类型：
--
作者：
Bhoyate, Sanket;Ionescu, M.;Gupta, Ram K.
聚氨酯(PU)的阻燃性差是一个全球性的问题，因为它限制了它们的应用，特别是在建筑、汽车和家用电器行业。加入阻燃材料可以解决PU的高阻燃性这一全球性挑战。然而，添加阻燃剂是不相容的，会降低PU的性能。为此，合成了脂肪族(ALI-1和ALI-2)和芳香族(Ar-1和Ar-2)结构溴化合物的反应性阻燃剂(RFR)，并以柠檬烯二硫醇为原料制备了生物基PU。含溴芳香泡沫塑料的泡孔含量(平均为97%和100%)和抗压强度(230和325 kPa)均高于含溴脂肪族泡沫塑料。在水平燃烧试验中，低溴浓度(5wt%)的Ar-1和Ar-2的燃烧时间分别为12.5和11.8 S，而ALI-1和ALI-2的燃烧时间分别为25.7和37 S。纯泡沫塑料的燃烧时间为74 S，纯PU泡沫塑料的失重率为26.5%，而5wt%溴含量的泡沫塑料在ALI-1、ALI-2、Ar-1和Ar-2泡沫塑料中的失重率分别为11.3、14、7.9和14%。结果表明，利用RFR材料可以有效地制备阻燃PU泡沫塑料。(C)2017威利期刊公司J.Appl。波兰姆。SCI。2018年，135%，46027。
Poor flame retardancy of polyurethanes (PU) is a global issue as it limits their applications particularly in construction, automobile, and household appliances industries. The global challenge of high flammability of PU can be addressed by incorporating flame-retardant materials. However, additive flame-retardants are non-compatible and depreciate the properties of PU. Hence, reactive flame-retardants (RFR) based on aliphatic (Ali-1 and Ali-2) and aromatic (Ar-1 and Ar-2) structured bromine compounds were synthesized and used to prepare bio-based PU using limonene dimercaptan. The aromatic bromine containing foams showed higher close cell content (average 97 and 100%) and compressive strength (230 and 325 kPa) to that of aliphatic bromine containing foams. Similar behavior was observed for a horizontal burning test where with a low concentration of bromine (5 wt %) in the foams for Ar-1 and Ar-2 displayed a burning time of 12.5 and 11.8 s while, Ali-1 and Ali-2 displayed burning time of 25.7 and 37 s, respectively. Neat foam showed a burning time of 74 s. The percentage weight loss for neat PU foam was 26.5%, while foams containing 5 wt % bromine in Ali-1, Ali-2, Ar-1, and Ar-2 foams displayed weight loss of 11.3, 14, 7.9, and 14%, respectively. Our results suggest that flame retardant PU foams could be prepared effectively by using RFR materials. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46027.