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首页> 外文期刊>Journal of Applied Polymer Science >Flexible-Elastic Copolymerized Polyurethane-Tannin Foams
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Flexible-Elastic Copolymerized Polyurethane-Tannin Foams

机译：柔性-弹性共聚聚氨酯-单宁泡沫

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摘要

Open cell foams obtained by the simultaneous coreaction of condensed flavonoid tannins with an alkoxylated fatty amine and polymeric diphenylmethane isocyanate yielded highly flexible/elastic polyurethane foams. Copolymerized amine/isocyanate/tannin oligomers were identified by ~(13)C NMR and MALDI-TOF spectroscopy. In general, between 30% and 50% of natural tannins is added to the components used to obtain polymerisation of the polyurethane. The characteristic of these new, partially biosourced polyurethanes is that the tannin present slows down burning, some of them can be made flame self-extinguishing and if burning they neither flow nor asperge flaming material around, contrary to what occurs with normal polyurethanes. This limits the possibility of transmitting fire to other materials in the same environment. Cyclic compression tests were carried out showing that after 50 cycles foam recovery was in excess of 80%.
机译：通过缩合的类黄酮单宁与烷氧基化脂肪胺和聚合的二苯基甲烷异氰酸酯的同时共作用而获得的开孔泡沫产生了高度柔软/弹性的聚氨酯泡沫。通过〜（13）NMR和MALDI-TOF光谱鉴定了共聚的胺/异氰酸酯/单宁低聚物。通常，将30％至50％的天然单宁添加至用于获得聚氨酯聚合的组分中。这些新的，部分生物来源的聚氨酯的特征在于，单宁会减缓燃烧，其中一些可以使火焰自熄，如果燃烧，它们既不会流动也不会散发燃烧性物质，这与普通聚氨酯相反。这限制了在同一环境中将火传播到其他材料的可能性。进行的循环压缩试验表明，在50个循环后，泡沫的回收率超过80％。

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