Thermal Decomposition Dynamics of Nylon 66 and Its Composites

doi:10.11901/1005.3093.2019.570

Chinese Journal of Materials Research

2020, Vol. 34

Issue (8): 599-604 DOI: 10.11901/1005.3093.2019.570

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Thermal Decomposition Dynamics of Nylon 66 and Its Composites

MIAO Yuezhen, WANG Xintong, XIE Mengshu, QI Kezhen, CHU Zengze, SUN Qiuju(

)

College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China

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MIAO Yuezhen, WANG Xintong, XIE Mengshu, QI Kezhen, CHU Zengze, SUN Qiuju. Thermal Decomposition Dynamics of Nylon 66 and Its Composites. Chinese Journal of Materials Research, 2020, 34(8): 599-604.

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Abstract

The thermal decomposition curves of nylon 66 (PA66) and two kinds of glass fiber reinforced nylon 66 composites (GF/PA) were measured by thermogravimetric analyzer, and the thermal decomposition kinetics of PA66 and GF/PA were investigated by the Kissinger method and Crane method. The results showed that the thermal decomposition reaction order of PA66, GF/PA-1 and GF/PA-2 were 0.949, 0.912 and 0.921, respectively, which were all consistent with first-order reactions with thermal decomposition activation energy of 218.65 kJ/mol, 121.81 kJ/mol and 132.23 kJ/mol, respectively. These results demonstrated that the incorporation of glass fiber reduced the thermal decomposition activation energy of PA66. In addition, by the same heating rate, the temperature corresponding to the maximum thermal decomposition rate for the two kinds of GF/PA was obviously lower than that for PA66, indicating that although glass fiber improved the performance of PA66, but accelerated the thermal decomposition process of PA66, and there was also a "wick effect".

Key words: composite nylon 66 glass fiber reinforced nylon 66 thermogravimetric analysis thermal decomposition kinetics

Received: 05 December 2019

ZTFLH:

TQ327.1

Fund: National Natural Science Foundation of China(51602207);Liaoning Natural Science Foundation(20170540825)

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	Yuezhen MIAO
	Xintong WANG
	Mengshu XIE
	Kezhen QI
	Zengze CHU
	Qiuju SUN

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https://www.cjmr.org/EN/10.11901/1005.3093.2019.570 OR https://www.cjmr.org/EN/Y2020/V34/I8/599

Fig.1 TG and DTG curves of PA66 (a), GF/PA-1 (b) and GF/PA-2 (c)

Table 1 Thermal decomposition data for PA66 and GF/PA

Fig.2 TG curves at different heating rates of PA66 (a), GF/PA-1 (b) and GF/PA-2 (c)

Fig.3 DTG curves at different heating rates (a) PA66; (b) GF/PA-1; (c) GF/PA-2

Table 2 T_p and corresponding calculated values of PA66 and GF/PA at different heating rates

Fig.4 Linear fitting curves of ln(β/T_p2)~1/T_p (a) PA66; (b) GF/PA-1; (c) GF/PA-2

Fig.5 Linear fitting curve of lnβ~1/T_p (a) PA66; (b) GF/PA-1; (c) GF/PA-2

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