提出了一种红外光谱分析用的热塑性塑料的制样新方法。将所检测的热塑性塑料样品置于制样专用的金属刮刀的平面上,用酒精灯加热至塑料软化呈熔化状态,将软化的样品转移至一平台上(此平台可用大理石、花岗岩或玻璃制成),将刮刀以倾斜状态压在样品上面,使刮刀的顶边与平台表面两者之间保持锐角状态,留出一定宽度的狭缝。在此条件下,持手柄将刮刀迅速向后压拉,于是在平台表面留下一片厚度约与狭缝宽度相当的样块。改变狭缝的宽度可制得不同厚度的样块。试验数据表明:所提出的方法可替代常用的制样方法,应用于热塑性塑料的制样。

A new method for preparation of samples of thermoplastic used for IR-spectrometric analysis was proposed in this paper. Sample of thermoplactic was heated on the flat surface of a scraper over an alcohol burner until it was softened in a molten state. The sample was then placed on a plateform (made of marble, granite or glass), and pressed with the scraper in an incline position keeping the end of the scraper to have an acute angle with the plateform and to leave a slit between the scraper edge and the plateform surface, and moved quickly backward with the scraper handle. Thus a thin piece of the thermoplastic sample, having its thickness to be equal to the width of slit approximately, was obtained and to be used for IRS analysis. By varying the slit width, sample of various thickness could be prepared. As shown by experimental results, this new method of sample preparation for the thermoplastic was feasible to be used in substitution for the conventional methods of sample preparation.