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首页> 外文期刊>RSC Advances >Synthesis and characterization of a cyclic 9,9-bis(4-hydroxyphenyl)fluorine (phenylene phosphonate) oligomer and its flame retardancy application
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Synthesis and characterization of a cyclic 9,9-bis(4-hydroxyphenyl)fluorine (phenylene phosphonate) oligomer and its flame retardancy application

机译：环状9,9-双（4-羟苯基）氟（亚苯基膦酸酯）低聚物的合成，表征及其阻燃应用

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摘要

A novel solid flame retardant cyclic 9,9-bis(4-hydroxyphenyl)fluorine (phenylene phosphonate) (CPFP) oligomer was synthesized in high yields by the reaction of phenylphosphonic dichloride with 9,9-bis(4-hydroxyphenyl) fluorine under pseudo-high-dilution conditions via polycondensation. Detailed structural characterizations of this oligomer were conducted by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), H-1 NMR, P-31 NMR and FTIR. Furthermore, the flame-retardant efficiency of this oligomer in polybutylene terephthalate (PBT) was studied using limiting oxygen index (LOI) and UL-94 tests. After the addition of CPFP, the LOI increased and the UL-94 V-0 rating was achieved. The occurrence of an interaction between CPFP and PBT was elucidated by thermogravimetric analysis (TGA), FTIR and pyrolysis/GC/MS. The results showed that the CPFP oligomer could change the degradation path of PBT and improves the char formation of the PBT/CPFP system. The residual morphologies of residues of the PBT/CPFP25% system were investigated by scanning electron microscopy (SEM). SEM investigations revealed that the residual chars contained polyphosphoric or phosphoric acid, which plays an important role in the process of carbonization.
机译：通过二氯苯基膦二氯与9,9-双（4-羟基苯基）氟在伪条件下的反应，高收率合成了一种新型的固体阻燃环状9,9-双（4-羟基苯基）氟（亚苯基膦酸酯）（CPFP）低聚物。 -通过缩聚的高稀释条件。通过基质辅助激光解吸/电离飞行时间质谱（MALDI-TOF-MS），H-1 NMR，P-31 NMR和FTIR对这种低聚物进行详细的结构表征。此外，使用极限氧指数（LOI）和UL-94测试研究了该低聚物在聚对苯二甲酸丁二醇酯（PBT）中的阻燃效率。添加CPFP后，LOI增大，并且达到了UL-94 V-0等级。通过热重分析（TGA），FTIR和热解/ GC / MS阐明了CPFP和PBT之间相互作用的发生。结果表明，CPFP低聚物可以改变PBT的降解途径，并改善PBT / CPFP体系的炭形成。通过扫描电子显微镜（SEM）研究了PBT / CPFP25％系统残留物的残留形态。 SEM研究表明，残留的焦炭中含有多磷酸或磷酸，这在碳化过程中起着重要作用。

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