First phosphorus AB2 monomer for flame-retardant hyperbranched polyphosphoesters: AB2vs. A2 + B3
First phosphorus AB2 monomer for flame-retardant hyperbranched polyphosphoesters: AB2vs. A2 + B3
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DOI：
10.1039/c9py01156k
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发表时间：
2019-11-21
影响因子：
4.6
通讯作者：
Wurm, Frederik R.
中科院分区：
文献类型：
--
作者：
Markwart, Jens C.;Battig, Alexander;Wurm, Frederik R.
支化聚合物是一类重要的聚合物，其具有高数量的端基、与其线性类似物相比较低的粘度和较高的可溶解性，这使得它们对于阻燃剂应用特别感兴趣，其中阻燃剂（FR）与另一种聚合物基质共混。超支化聚磷酸酯（hbPPE）在阻燃性领域中获得越来越多的关注，因为低摩尔质量FR通常具有在消费品中不期望的起霜或浸出的缺点。在这里，我们提出了用于合成hbPPE的第一个磷基AB（2）单体，并与通过A（2）+ B-3方法合成的hbPPE相比，评估其在环氧树脂中的阻燃性能。由AB（2）单体合成的hbPPE与由A（2）+ B-3加聚制备的类似hbPPE相比表现出略高的性能，可能是由于其较高的磷含量。
Branched polymers are an important class of polymers with a high number of terminal groups, lower viscosity compared to their linear analogs and higher miscibility, which makes them especially interesting for flame retardant applications, where the flame retardants (FR) are blended with another polymer matrix. Hyperbranched polyphosphoesters (hbPPEs) are gaining more and more interest in the field of flame retardancy, as low molar mass FRs often have the disadvantage of blooming out or leaching, which is not desired in consumer products. Here, we present the first phosphorus-based AB(2) monomer for the synthesis of hbPPEs and assess its flame-retardant performance in an epoxy resin compared to a hbPPE synthesized by an A(2) + B-3 approach. The hbPPE synthesized from an AB(2) monomer exhibited a slightly higher performance compared to a similar hbPPE, which was prepared by A(2) + B-3 polyaddition, probably due to its higher phosphorus content.