Migration Characteristics and Degradation Kinetics of Bisphenol A

Abstract:

This paper study the migration characteristics and degradation kinetics of bisphenol A using TGA - gas chromatography - mass spectrometry and found that bisphenol A polycarbonate in the thermal oxidative aging conditions of 130 °C de-gradated to bisphenol A. At the range of 0 h to 120 h, the bisphenol A content of environmental hormones increased with time. When it reached 120 h, bisphenol A environmental hormone content decreased slightly with aging time. The content of bisphenol A reached 495mg/kg when the thermal oxidative aging time was 168 h, which was decreased compared to the content of 442mg/kg at 120 h. Polycarbonate thermal decomposition kinetics study showed that the thermal decomposition of polycarbonate can be divided into three phases. The first thermal decomposition occurred at the range of 415° C to 425 ° C, the polycarbonate end groups fracture of the second stage at 493.6°C , the main fracture of the main chain rearrangement and crosslinking, and the third stage at 598.7°C, the degradation of the chain continues to decompose and the decomposition of the crosslinked carbon precursor; thermal oxidation aging of polycarbonate decreased the heat stability and promote the thermal decomposition of polycarbonate. Comparing the oxidation induction period, thermal weight loss rate and activation energy of polycarbonate before and after thermal oxidative aging, it c found that the thermal stability of the hot oxygen aging of polycarbonate is reduced.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 128-136
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.128
• Online since: March 2016
• Authors: Zhuo Jun Sun, Jian Gao, Hui Liu, Shu Zhen Pan, Shu Li Zhang, Lun Hua Yang, Xiao Yun Song, Jian Guo Gao
• Keywords: Bisphenol A, Gas Chromatography - Mass Spectrometry, Kinetics of Thermal Decomposition, Release

References

[1] Gao W B, Zhang Z M, World Plastics, 2009，27(10): 32-37.

[2] Wu Yongning, Jiang Guibin，Important organic pollutants trace and ultra-trace inspection technology，Beijing: Chemical Industry Press, 2007: 597.

[3] Gao X, Sun Z, Zhang S Y, Journal of Inspection and Quarantine, 2007, 17(6): 36-37.

[4] Zhang W D, Physical Testing and Chemical Analysis(Part B: Chemical Analysis), 2001, 37(4): 188-190.

[5] Jang B N，Wilkie C A, Polym. Degrad. Stab, 2004, 86: 419–430.

[6] Hagenaars A C, GoddrieW J, Bailly C H. Polymer, 2002, 43: 5043-5049.

[7] Gao W B，Xu L C，Dan Y, Plastics，2010, 39(2): 61-64.

[8] GB/T 5009. 99-2003. Method for Analysis of Hygienic Standard of Polycarbonate ResinUsed as Food Containers and Packaging Materials.

[9] Zhang W, Gao X, Wang C H，Jiang X Y，Xu H, Acta Polymerica Sinica., 2009, 12: 1282-1286.

[10] Becker L , Lenoir D, Matuschek G，Kettrup A.J. Anal. Appl. Pyrol., 2001, 60: 55–67.

[11] Kurihara Fuji plastic ageing [M]. Wu Sanshuo transl. Beijing: National Defence Industry Press，1977: 61.

[12] Ceng Xianfeng, Gan group, Hu Hangjun, Chen, Yang Jingsheng Xunzhuan, Li Yaorong, Tang Fupei, Luo Zubo, Guo Anquan, Shen Qixin， Molecular materials aging and aging resistance of [M], Beijing: Chemical Industry Press, 1979, 220-222.

[13] Pu H D, Zhang X Y, Zhang Q W, Journal of Building Materials, 2004, 7(3): 360-364.

[14] Wang S, Hu Y, Wang Z, Polym. Degrad. Stab., 2003, 80: 157–161.

[15] Jang B N, Wilkie C A, Thermochimica Acta, 2005, 426: 73–84.

[16] Yin D S, Ding Y H, Liu J R, Journal of Changzhou University(Natural Science Edition) 2010, 22(2): 20-23.

[17] Liu N A, Fan W C, Thermochimica Acta, 1999, 338 (1): 85- 94.

[18] Liu N A, Fan W C, Critical consideration on the Freeman and Carroll method for evaluating global mass loss kinetics of polymer thermal degradation[J]. Thermochimica Acta, 1999, 338 (1): 85- 94.

DOI: 10.1016/s0040-6031(99)00197-5

[19] Freeman E S., Carroll B J, Kinetics of thermal degradation of charforming plastics from thermogravimetry, Phys Chem, 1958, 62: 394-397.