CN105372287B - The detection method of polystyrene reworked material in a kind of extruded polystyrene board - Google Patents
The detection method of polystyrene reworked material in a kind of extruded polystyrene board Download PDFInfo
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- CN105372287B CN105372287B CN201510711491.5A CN201510711491A CN105372287B CN 105372287 B CN105372287 B CN 105372287B CN 201510711491 A CN201510711491 A CN 201510711491A CN 105372287 B CN105372287 B CN 105372287B
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Abstract
The invention provides a kind of detection method of polystyrene reworked material in extruded polystyrene board, comprise the following steps：(1) tabletting is cut；(2) 5mg of sample 3 that step (1) obtains is taken respectively, is tested using differential scanning calorimeter；(3) glass transition temperature of each sample is demarcated；(4) determine the glass transition temperature of extruded polystyrene board with the standardized curve of polystyrene reworked material content；(5) 5mg of extruded polystyrene board 3 to be detected, repeat step (2) are taken；(6) by the glass transition temperature of the data scaling collected extruded polystyrene board to be detected；(7) point corresponding to the glass transition temperature obtained by being found in the standardized curve in step (6), abscissa corresponding to the point is the polystyrene reworked material mass percent content of extruded polystyrene board to be detected.Easily and fast, and result is accurate for this method of the present invention, eliminates technique difference difference to caused by thermal analysis system as reworked material detection method.
Description
Technical field
The invention belongs to insulation material extruded polystyrene board product quality identification and analysis technical field, more particularly, to one kind one
The detection method of polystyrene reworked material in kind extruded polystyrene board.
Background technology
The authentication method of reworked material is at this stage in the quality control to extruded polystyrene sheet material in extruded polystyrene panel products
The problem that building materials field is extremely paid close attention to.Application of the extruded polystyrene board in external insulating system for thinly plastered external wall is quite varied.
Further to promote the development of Building Energy-saving Work, it is ensured that the construction quality of extruded polystyrene board exterior wall outer thermal insulation thin-coat plaster system,
Addition of the scientific and effective method to reworked material must be taken to carry out detection control.Past attempts have using physical property method of inspection,
The methods of infrared spectroscopy, is detected to reworked material, survey fixed sum data analysis process of the infrared analysis to reworked material
For：In atlas of near infrared spectra, no matter raw material or reworked material, characteristic peak frequency values are identical, simply in peak type size, go out peak intensity
Degree has different, so as to judge primary material, reworked material difference.But these methods are general all fairly simple, rough, can only do
Qualitative test is carried out for a kind of householder method, analyzing and identifying for reworked material can not be carried out well.
The content of the invention
In view of this, the present invention is directed to propose in a kind of extruded polystyrene board polystyrene reworked material detection method, with gram
The deficiencies in the prior art are taken, the difference power or heat flow of measured matter and reference substance difference and temperature are passed through using differential scanning calorimetry
The content of reworked material in the tracing analysis identification extruded polystyrene sheet material of degree relation.Easily and fast, and result is accurate, disappears for this method
Except technique difference to caused by thermal analysis system as reworked material detection method difference, can realize.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The detection method of polystyrene reworked material, comprises the following steps in a kind of extruded polystyrene board：
(1) some groups of extruded polystyrene board samples with known polystyrene reworked material weight/mass percentage composition are selected, and are divided
Tabletting is not cut；
(2) the sample 3-5mg for taking step (1) to obtain respectively, is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, profit
Tested with differential scanning calorimeter, test successively by heating for the first time, insulation for the first time, cooling, second insulation and
Second of heating；
(3) by the glass transition temperature of the data scaling each sample collected；
(4) determine that the glass transition temperature of extruded polystyrene board contains with polystyrene reworked material using the data of step (3)
Measure the standardized curve of change；
(5) extruded polystyrene board 3-5mg to be detected is taken, is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, utilizes difference
Scanning calorimeter instrument is tested, and test is passed through and the heating for the first time of the step (2) identical, for the first time insulation, drop successively
Temperature, second of insulation and second of heating；
(6) by the glass transition temperature of the data scaling collected extruded polystyrene board to be detected；
(7) point corresponding to the glass transition temperature obtained by being found in the standardized curve in step (6), the point
Corresponding abscissa is the polystyrene reworked material mass percent content of extruded polystyrene board to be detected.
Further, extruded polystyrene board to be detected in the extruded polystyrene board sample of the step (1) and the step (5)
For same source, described same source refers to：It is to be checked in the extruded polystyrene board sample and the step (5) of the step (1)
Raw material sources are identical in the extruded polystyrene board of survey, and preparation technology is also identical, it is preferable that raw material sources are the same batch of same producer
Raw material, preparation technology is the same preparation technology of same producer；Such preferred scheme is in order to avoid different process conditions
Obtained finished product causes the error of test result.
Further, the demarcation in the step (3) and step (6) refers to use TA Instruments Universal
The softwares of Analysis 2000 are demarcated, and during demarcation, the softwares of TA Instruments Universal Analysis 2000 determine to open
Beginning deviates baseline and transformation retrodeviates at 2 points from baseline, the base line extension before and after changing, and the vertical range between two lines is rank
Difference, can be glass transition temperature with the temperature value corresponding to the point of intersection of test curve at half jump.
Further, the differential scanning calorimeter in the step (2) and step (5) is Q20 differential scanning calorimeters.
Further, the weight/mass percentage composition numerical value of polystyrene reworked material preferably takes at equal intervals in the step (1)
, such as：The weight/mass percentage composition of polystyrene reworked material is respectively 0,5%, 10%, 15%, 20% in the step (1)；
Or the weight/mass percentage composition of polystyrene reworked material is respectively 0,6%, 12%, 18%, 24% in the step (1).
Further, in the step (2) and step (5), in order to eliminate the different thermal history of each sample and solvent
Etc. the influence of extraneous factor, to eliminate the internal flaw of curve, test is needed by 2 temperature-rise periods.Heating uses for the first time
Be raised to 200 DEG C from 20 DEG C with 20 DEG C/min speed, the first time soaking time is 1 minute, described cooling with 10 DEG C/
Min speed is dropping to 20 DEG C from 200 DEG C, and second of soaking time is 2 minutes, while in order in equal thermal history condition
Under, the glass transition curve that seems more typical and regular behind the stress relaxation that is eliminated peak, second of heating is used with 10
DEG C/min speed is raised to 200 DEG C from 20 DEG C.In heating, if heating rate is excessively slow, experimental period is oversize, is unfavorable for experiment and opens
Exhibition, and the glass transition temperature unobvious of XPS, therefore 10 DEG C/below min speed can not be selected；If heating speed
Rate is too fast, can influence test result, and curve deviation is larger.Therefore, the present invention is from 20 DEG C/min and 10 DEG C/min, two kinds of heatings
Speed carries out just accessing most accurate test result with secondary heating for the first time respectively.
Further, data are obtained using the step (3) and also can obtain normalized equation.
The tabletting of the step (1) refers to the extruded polystyrene board sample being compacted in tablet press machine to improve density reduction
Volume, facilitate sampling and testing.
Relative to prior art, the present invention has the advantage that：
(1) thermal analysis system is introduced, employs reworked material in differential scanning calorimetry identification extruded polystyrene sheet material, extrusion molding gathers
The reworked material content of benzene plate material obtains effective detection, and overcoming can only be qualitative to the progress of reworked material content in conventional detection method
The drawbacks of detection.
(2) present invention eliminates technique difference difference to caused by thermal analysis system as reworked material detection method.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the extruded polystyrene board sample DSC of different polystyrene reworked material contents curvilinear motion figure；
Fig. 2 is standardized curve.
Description of reference numerals：
A is the curvilinear motion figure of extruded polystyrene board sample DSC when polystyrene reworked material weight/mass percentage composition is 0；
B is the curvilinear motion figure of extruded polystyrene board sample DSC when polystyrene reworked material weight/mass percentage composition is 5%；
C is the curvilinear motion figure of extruded polystyrene board sample DSC when polystyrene reworked material weight/mass percentage composition is 10%；
D is the curvilinear motion figure of extruded polystyrene board sample DSC when polystyrene reworked material weight/mass percentage composition is 15%；
E is the curvilinear motion of extruded polystyrene board sample DSC when polystyrene reworked material content weight/mass percentage composition is 20%
Figure.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The detection method of polystyrene reworked material, comprises the following steps in a kind of extruded polystyrene board：
(1) the polystyrene reworked material weight/mass percentage composition for selecting certain manufacturer production is respectively 0,5%, 10%, 15%,
20% extruded polystyrene board sample, and cut and be compacted in YP-24 tablet press machines respectively；
(2) the sample 3-5mg for taking step (1) to obtain respectively, is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, profit
Tested with Q20 differential scanning calorimeters, 200 DEG C be first raised to from 20 DEG C with 20 DEG C/min speed, be incubated 1 minute, with
10 DEG C/min speed is dropping to 20 DEG C from 200 DEG C, is incubated 2 minutes, is finally raised to 200 from 20 DEG C with 10 DEG C/min speed
℃；
(3) data collected are demarcated into various kinds with the softwares of TA Instruments Universal Analysis 2000
The glass transition temperature of product, as a result as shown in Figure 1；
(4) determine that the glass transition temperature of extruded polystyrene board contains with polystyrene reworked material using the data of step (3)
The standardized curve of amount and corresponding normalized equation y=-0.2948x+104.656, wherein standardized curve are as shown in Figure 2；
(5) the unknown extrusion molding to be detected of the polystyrene content of the same production technology preparation of the same raw material of same producer is taken
Styrofoam 3-5mg, it is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, is tested using differential scanning calorimeter, is tested
Pass through successively and the heating for the first time of the step (2) identical, for the first time insulation, cooling, second insulation and heat up for second；
(6) by the glass transition temperature of the data scaling collected extruded polystyrene board to be detected；
(7) point corresponding to the glass transition temperature obtained by being found in the standardized curve in step (6), the point
Corresponding abscissa is the polystyrene reworked material mass percent content of extruded polystyrene board to be detected.Or by step
(6) glass transition temperature obtained is brought into as y values in described normalized equation, and obtained x values are to be detected squeeze
Mould the weight/mass percentage composition of styrofoam reworked material.
Further, the polystyrene reworked material weight/mass percentage composition with the step (1) same source is taken to be respectively
2%th, 6%, 9%, 12%, 17% extruded polystyrene board, it is respectively labeled as detecting sample 1, detection sample 2, detection sample 3, detection sample 4,
The process of repeating said steps (5)~step (7), finally give detection sample 1, detection sample 2, detect the reworked material of sample 3 containing measuring
It is respectively to detected value：
As seen from the above table, the error amount that sample is detected using the present invention is held within ± 5%, and accuracy of detection is high, is surveyed
Test result is credible, overcomes the drawbacks of conventional detection method is qualitative analysis.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
- A kind of 1. detection method of polystyrene reworked material in extruded polystyrene board, it is characterised in that：Comprise the following steps：(1) some groups of extruded polystyrene board samples with known polystyrene reworked material weight/mass percentage composition are selected, and respectively will It cuts tabletting；(2) the sample 3-5mg for taking step (1) to obtain respectively, is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, utilizes difference Scanning calorimeter instrument is tested, and test is successively by heating for the first time, for the first time insulation, cooling, second of insulation and second Secondary heating；(3) by the glass transition temperature of the data scaling each sample collected；(4) determine that the glass transition temperature of extruded polystyrene board contains quantitative change with polystyrene reworked material using the data of step (3) The standardized curve of change；(5) extruded polystyrene board 3-5mg to be detected is taken, is fitted into aluminum sample disc, in the atmosphere of High Purity Nitrogen, is swept using differential Retouch calorimeter to be tested, test is passed through and the heating for the first time of the step (2) identical, for the first time insulation, cooling, the successively Secondary insulation and second of heating；(6) by the glass transition temperature of the data scaling collected extruded polystyrene board to be detected；(7) point corresponding to the glass transition temperature obtained by being found in the standardized curve in step (6), the point are corresponding Abscissa be extruded polystyrene board to be detected polystyrene reworked material mass percent content；Extruded polystyrene board to be detected is same source in the extruded polystyrene board sample and the step (5) of the step (1).
- 2. the detection method of polystyrene reworked material in a kind of extruded polystyrene board according to claim 1, it is characterised in that： Demarcation in the step (3) and step (6) refers to use the softwares of TA Instruments Universal Analysis 2000 Demarcation.
- 3. the detection method of polystyrene reworked material in a kind of extruded polystyrene board according to claim 1, it is characterised in that： Differential scanning calorimeter in the step (2) and step (5) is Q20 differential scanning calorimeters.
- 4. the detection method of polystyrene reworked material in a kind of extruded polystyrene board according to claim 1, it is characterised in that： The weight/mass percentage composition of polystyrene reworked material is respectively 0,5%, 10%, 15%, 20% in the step (1).
- 5. the detection method of polystyrene reworked material in a kind of extruded polystyrene board according to claim 1, it is characterised in that： In the step (2) and step (5), heating for the first time uses is raised to 200 DEG C, first time with 20 DEG C/min speed from 20 DEG C Soaking time is 1 minute, described cooling is dropping to 20 DEG C from 200 DEG C with 10 DEG C/min speed, and second of soaking time is 2 Minute, described second heating uses and is raised to 200 DEG C from 20 DEG C with 10 DEG C/min speed.
- 6. the detection method of polystyrene reworked material in a kind of extruded polystyrene board according to claim 1, it is characterised in that： The tabletting of the step (1) refers to the extruded polystyrene board sample being compacted in tablet press machine.
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| CN106769986B (en) * | 2017-01-11 | 2019-03-22 | 天津市贰拾壹站检测技术有限公司 | The identification of recycling plastics and quantitative detecting method in a kind of plastic pipe |
| CN111735795A (en) * | 2020-08-12 | 2020-10-02 | 大连工业大学 | Method for identifying regenerated material doped in food contact material |
| CN114858744B (en) * | 2022-04-29 | 2024-09-20 | 重庆长安汽车股份有限公司 | Method for testing PP content of reclaimed materials in PP material product |
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Address after: No. 508, Hongqi Road, Nankai District, Tianjin, Tianjin Co-patentee after: TIANJIN BUILDING MATERIALS SCIENCE INSTITUTE Patentee after: TIANJIN ERSHIYIZHAN DETECTION TECHNOLOGY Co.,Ltd. Address before: No. 508, Hongqi Road, Nankai District, Tianjin, Tianjin Co-patentee before: TIANJIN BUILDING MATERIALS SCIENCE INSTITUTE Patentee before: TIANJIN BUILDING MATERIAL PRODUCT QUALITY SUPERVISION AND INSPECTION CENTER |
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Effective date of registration: 20221114 Address after: 300381 No. 508 Hongqi South Road, Tianjin, Nankai District Patentee after: TIANJIN ERSHIYIZHAN DETECTION TECHNOLOGY Co.,Ltd. Address before: 300381 No. 508 Hongqi South Road, Tianjin, Nankai District Patentee before: TIANJIN ERSHIYIZHAN DETECTION TECHNOLOGY Co.,Ltd. Patentee before: TIANJIN BUILDING MATERIAL ACADEMY CO.,LTD. |