Editing Thermogravimetric analysis (section)

===Thermal stability===

TGA can be used to evaluate the [[thermal stability]] of a material. In a desired temperature range, if a species is thermally stable, there will be no observed mass change. Negligible mass loss corresponds to little or no slope in the TGA trace. TGA also gives the upper use temperature of a material. Beyond this temperature the material will begin to degrade.

TGA is used in the analysis of polymers. Polymers usually melt before they decompose, thus TGA is mainly used to investigate the thermal stability of polymers. Most polymers melt or degrade before 200&nbsp;°C. However, there is a class of thermally stable polymers that are able to withstand temperatures of at least 300&nbsp;°C in air and 500&nbsp;°C in inert gases without structural changes or strength loss, which can be analyzed by TGA.<ref name="Liu 2006 p937">{{cite journal | title = Evaluating the Thermal Stability of High Performance Fibers by TGA | journal = [[Journal of Applied Polymer Science]] | year = 2006 | volume = 99 | issue = 3 | pages = 937–944 | doi = 10.1002/app.22305 | author1 = Liu, X. | author2 = Yu, W.}}</ref>
<ref name="Marvel 1972">{{ cite journal | title = Synthesis of Thermally Stable Polymers | journal = [[Ft. Belvoir: Defense Technical Information Center]] | year = 1972 | author1 = Marvel, C. S.}}</ref> 
<ref name="Tao 2009 p1114">{{cite journal | title = Synthesis and Characterization of Fluorinated PBO with High Thermal Stability and Low Dielectric Constant | journal = [[Journal of Macromolecular Science, Part B]] | year = 2009 | volume = 48 | issue = 6 | pages = 1114–1124 | doi = 10.1080/00222340903041244 | author1= Tao, Z. | author2 = Jin, J. | author3 = Yang, S. | author4 = Hu, D. | author5 = Li, G. | author6 = Jiang, J.| bibcode = 2009JMSB...48.1114Z | s2cid = 98016727 }}</ref>