应用热重分析方法对21种激光打印机用墨粉样品作了热失重研究。在氮气气氛中,分别对21种样品用TA 2050型热重分析仪在静态恒温及动态升温条件下的热稳定性及热解曲线的差异作了比较。在整个静态恒温条件的分析过程中,21个样品的失重在0.60%~1.16%之间,多数在1%左右。从动态升温的热失重数据及其热解曲线可见,各种墨粉之间存在较明显的差异,例如在曲线上呈现单个或多个失重台阶,失重的温度和温度区间的不同以及趋于恒重状态的温度和残重的不同等。据此认为热重分析可以为鉴别不同牌号的墨粉提供依据,而且还可对墨粉的组分作出初步判别。

Weight-loss on heating of 21 samples taken from different grades of toners used in laser printers was studied by thermogravimetry. A comparative study on the stability to heating and differences among the pyrolytic curves of these samples was made by analyzing these sample with the TA 2050 Thermogravimetric Analyzer under the conditions of static constant temperature and dynamic temperature elevation. In the whole process under the static constant temperature condition, the values of weight-loss of the 21 samples attained to values in the range of 0.60%-1.16% with the majority around 1%. While under the dynamic temperature elevation condition, significant differences were found among the data of weight-loss and the pyrolytic curves of these sample, shown especially by the number of steps appeared in the curves; the differences of temperature and temperature range relating to weight-loss and the differences of temperature attaining to constant weight as well as the masses of the respective residues. Based on these facts, discrimination among different brands of the toners and also a preliminary determination of their components could be made.