Method for measuring content of ash in polyolefin samples
A technology of ash content and polyolefin, applied in measuring devices, analyzing materials, weighing by removing certain components, etc., can solve problems such as long time-consuming, cumbersome sample preparation, and inability to quickly provide data to guide production, and achieve shortening Measuring time and the effect of simplifying the sample preparation steps
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Embodiment 1
[0089] Adopt the method of the present invention, carry out the determination of the ash content to the granule material that the grade of polypropylene is PP-S1003.
[0090] The specific experimental method is as follows:
[0091] 1.1 Check whether the instrument is operating normally and whether the ventilation is normal.
[0092] 1.2 Put an ordinary crucible with a cover in the furnace, and heat it to constant weight under the test condition of 850°C. Put it in a desiccator for at least 1 h, let it cool to room temperature, and weigh it on an electronic balance to the nearest 0.1 mg.
[0093] 1.3 Weigh 12.5g (accurate to 50mg) of PP-S1003 pellet sample, and put the sample into a crucible with a lid. The lid should not be tightly closed, leaving a gap.
[0094] 1.4 Put the crucible containing the sample into the instrument, place it evenly, close the furnace door and the instrument door; call out the corresponding method program according to the sample type. The polypropy...
Embodiment 2
[0104] According to the method of the present invention, the ash content in the PP-S1003 polypropylene pellet sample is measured, and the ash content is measured for parallel samples by using the national standard gravimetric method and X-fluorescence spectroscopy. In this embodiment, the PP-S1003 polypropylene pellet sample adopts the heating program (heating program 1) shown in the above table 3 according to the present invention, and the following table 5 (heating program 2) and table 6 (heating program 3) respectively. ) shows the heating program for ashing.
[0105] table 5
[0106] program
Target temperature (℃)
Temperature climbing time (min)
stay state
Ashing time (min)
1
100
5
no
0
2
240
10
no
5
3
350
13
no
8
4
530
20
no
13
5
830
25
no
10
[0107] Table 6
[0108] program
Target temperature (℃)
Temperature climbing time (min) ...
Embodiment 3
[0114] Adopt the method of embodiment 1, carry out the mensuration of the ash content to the granular material that polyethylene trade mark is PE-2426H. The difference was that the staged heating conditions described in Table 8 were used for the polyethylene samples.
[0115] Table 8
[0116] program
Target temperature (℃)
Temperature climbing time (min)
stay state
Ashing time (min)
1
105
5
no
0
2
355
10
no
10
3
550
15
no
10
4
800
15
no
10
[0117] The results obtained are shown in Table 9 below.
[0118] Table 9: Determination data of PE-2426H ash content
[0119] Numbering
PUM
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