Investigation on Thermal Degradation of Poly(1,4-butylene terephthalate) Filled with Aluminum Hypophosphite and Trimer by Thermogravimetric Analysis鈥揊ourier Transform Infrared Spectroscopy and Thermog

详细信息    查看全文

• 作者：Hongqiang Qu ; Xin Liu ; Jianzhong Xu ; Haiyun Ma ; Yunhong Jiao ; Jixing Xie
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：May 21, 2014
• 年：2014
• 卷：53
• 期：20
• 页码：8476-8483
• 全文大小：349K
• 年卷期：v.53,no.20(May 21, 2014)
• ISSN：1520-5045

文摘

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鈥揊ourier transform infrared and thermogravimetric analysis鈥搈ass 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鈥搊xygen 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.