Investigation on Thermal Degradation of Poly(1,4-butylene terephthalate) Filled with Aluminum Hypophosphite and Trimer by Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis-Mass Spectrometry
Investigation on Thermal Degradation of Poly(1,4-butylene terephthalate) Filled with Aluminum Hypophosphite and Trimer by Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis-Mass Spectrometry
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DOI：
10.1021/ie404297r
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发表时间：
2014-05-21
影响因子：
4.2
通讯作者：
Xie, Jixing
中科院分区：
文献类型：
--
作者：
Qu, Hongqiang;Liu, Xin;Xie, Jixing
以次磷酸铝（AHP）和三（1-氧-2,6,7-三氧-1-磷二氯[2,2,2]辛烷-甲基）磷酸（Trimer）为原料制备了阻燃型聚对苯二甲酸1,4-丁二醇酯（PBT）。采用极限氧指数、UL-94和锥量热法对阻燃PBT的燃烧性能进行了评价。锥形量热仪数据表明，PBT/AHP/Trimer的存在具有显著的抑烟效果。采用热重分析、傅立叶变换红外分析和热重分析质谱法研究了阻燃PBT的热降解性能。对于PBT、PBT/25% AHP和PBT/AHP/三聚体样品，主要气体热解产物为CO2和丁二烯；PBT/AHP/Trimer样品产生的CO2和丁二烯较少，因此在基体中保留了更多的碳。PBT/25% AHP的磷氧自由基数量是PBT/AHP/Trimer的1.3倍，说明单独AHP的气相效应略强于AHP与Trimer的联合作用。x射线光电子能谱分析进一步证实了这一结果。
Flame-retarded poly(1,4-butylene terephthalate) (PBT) has been prepared using aluminum hypophosphite (AHP) and tri(1-oxo-2,6,7-trioxa-1-phosphabicyclo[2,2,2]octane-methyl)phosphate (Trimer). The combustion properties of flame-retarded PBT were evaluated using limiting oxygen index, UL-94, and cone calorimetry. The cone calorimeter data indicated that the presence of PBT/AHP/Trimer imparted a significant smoke-suppressing effect. The thermal degradation properties of flame-retarded PBT were investigated using thermogravimetric analysis Fourier transform infrared and thermogravimetric analysis mass spectrometry. For the samples of PBT, PBT/25% AHP, and PBT/AHP/Trimer, the main gas pyrolysis products were CO2 and butadiene; the sample of PBT/AHP/Trimer generated less CO2 and butadiene and consequently retained more carbon in the matrix. The amount of phosphorus oxygen radicals of PBT/25% AHP was 1.3 times that of PBT/AHP/Trimer, which indicated that AHP alone showed slightly stronger gaseous phase effect than the combination of AHP and Trimer. This result is further confirmed by the analysis of the char residues by X-ray photoelectron spectroscopy.