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首页> 外文期刊>Journal of Applied Polymer Science >Carbon dioxide adducts from DOPO-grafted polyethylenimines as both blowing agents and flame retardants for polyurethanes
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Carbon dioxide adducts from DOPO-grafted polyethylenimines as both blowing agents and flame retardants for polyurethanes

机译：多氧化碳聚乙烯加合物加入多乙基菊花作为发泡剂和用于聚氨酯的阻燃剂

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摘要

The high risk of flammability of polyurethane foams (PUFs) and the high global warming potentials of polyurethane (PU) blowing agents rank key problems to be solved in PUF industry. Herein, 9,10-dihydro-9-oxa-10-phosphenanthrene-10-oxide (DOPO)-grafted polyethylenimines (PEIs) are synthesized via Atherton-Todd reaction, with grafting rate ranging from 13.3% to 28.3%. The grafted PEIs further react with CO2 to obtain corresponding CO2 adducts (DOPO-PEI-CO(2)s). On the one hand, these CO2 adducts can disperse into PU foaming mixture to release CO2 as a climate-friendly blowing agent. The resultant PUFs possess a density about 56 kg m(-3) and a compressive strength over 200 kPa, suitable for some industrial applications. On the other hand, the DOPO grafting endows the PUFs with moderate flame retardancy, increasing the PUFs' limiting oxygen index value from 19.7 to 25 vol%, and decreasing the horizontal burning speed from about 360 mm min(-1) down to 130 mm min(-1). This study for the first time provides a type of polyurethane (PU) raw material that can serve as both blowing agents and flame retardants.
机译：聚氨酯泡沫塑料（PUF）的高易燃性和聚氨酯（PU）发泡剂的高全球变暖潜能是PUF行业需要解决的关键问题。在此，通过Atherton-Todd反应合成了9,10-二氢-9-氧-10-磷菲-10-氧化物（DOPO）-接枝聚乙烯亚胺（PEI），接枝率在13.3%到28.3%之间。接枝的PEIs进一步与CO2反应，得到相应的CO2加合物（DOPO-PEI-CO（2）s）。一方面，这些二氧化碳加合物可以分散到聚氨酯发泡混合物中，释放二氧化碳，作为一种气候友好的发泡剂。合成的PUF具有约56 kg m（-3）的密度和超过200 kPa的抗压强度，适用于某些工业应用。另一方面，DOPO接枝赋予PUF适度的阻燃性，将PUF的极限氧指数从19.7%增加到25 vol%，并将水平燃烧速度从约360mm min（-1）降低到130mm min（-1）。这项研究首次提供了一种既可作为发泡剂又可作为阻燃剂的聚氨酯（PU）原料。

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