CN108982381A - In a kind of judgement mixed rubber whether the method containing isoprene rubber - Google Patents
In a kind of judgement mixed rubber whether the method containing isoprene rubber Download PDFInfo
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- CN108982381A CN108982381A CN201810649486.XA CN201810649486A CN108982381A CN 108982381 A CN108982381 A CN 108982381A CN 201810649486 A CN201810649486 A CN 201810649486A CN 108982381 A CN108982381 A CN 108982381A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
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Abstract
The invention belongs to the authentication technique field of high molecular material, disclose in a kind of judgement mixed rubber whether the method containing isoprene rubber, whether the method containing isoprene rubber includes: to choose mixed rubber to be checked in the judgement mixed rubber；Mixed rubber is pre-processed, processing meets ionomer emission spectrum method testing requirements；Ionomer emission spectrum method carries out elemental analysis to test mixed rubber；According to elemental analysis as a result, whether judging to test in mixed rubber containing the characteristic element in isoprene rubber.Whether the present invention is judged in mixed rubber by way of contained characteristic element in detection isoprene rubber containing isoprene rubber, breach the bottleneck of mixed rubber identification, realize effective qualitative analysis of mixed rubber, method and foundation are provided for the import control of mixed rubber, is conducive to the stable development for safeguarding mixed rubber market.
Description
Technical field
It is different the invention belongs to whether contain in the authentication technique field of high molecular material more particularly to a kind of judgement mixed rubber
The method of penta rubber.
Background technique
Currently, the status that mixed rubber identifies is such that the world natural rubber consumption Yi Ju in China in recent years is first
Position, natural rubber needed for country's rubber product largely relies on import at present, and import from is mainly ASEAN countries.Due to
Domestic natural rubber category weak industries, China is from after in November, 2001 accession to the WTO (WTO), although eliminating day
The import quota control of right rubber, but by its customs tariff by being adjusted to 20% on 12%.According to customs tariff, mixed rubber (tax
Number 4002.8000) under synthetic rubber (40.02) tax items, the description to mixed rubber be " product listed by tax items 40.01 with
The mixture of product listed by this tax items (40.02) ", the i.e. mixture of natural rubber and synthetic rubber.Mixed rubber import is most
The favour state tax rate is 7.5%, and is being 0 with mixed rubber agreement tariff in Association of South-east Asian Nations's trade.Occur in the market with natural rubber as a result,
The normal import of mixed rubber the case where pretending to be mixed rubber import, is affected, causes the quality of mixed rubber in the market to join
Difference is uneven, also brings difficulty to the import supervision of mixed rubber.In order to manage the import of mixed rubber, just need to mixed first
It closes rubber to be identified, determine in mixed rubber in addition to natural rubber, while also containing synthetic rubber, to avoid with natural rubber
Glue pretends to be the case where mixed rubber.Most of synthetic rubber are different from natural rubber molecular structure, can pass through infra-red sepectrometry etc.
Common detection method identifies.Isoprene rubber is one kind of synthetic rubber, is artificial synthesized " natural rubber ", molecule knot
Structure is essentially identical with natural rubber, and the common detection method such as infra-red sepectrometry can not effectively identify the two.When natural rubber
When glue and isoprene rubber mix, it can determine that natural rubber exists by the detection of cupreol, but whether can not identify containing different
Penta rubber.
In conclusion now mixed rubber identify the problem is that:
If stating that certain mixed rubber is the mixture of natural rubber and isoprene rubber, it can not effectively identify and wherein whether contain
Isoprene rubber.
Solve the difficulty and meaning of above-mentioned technical problem: isoprene rubber is one kind of synthetic rubber, is artificial synthesized " day
Right rubber ", molecular structure is essentially identical with natural rubber, and the conventional methods such as infra-red sepectrometry can not identify natural rubber and different
Penta rubber.In this case, occur in the market with mixed rubber name import natural rubber come the problem of tax avoidance.By to mixing
The identification of isoprene rubber in rubber, detects mixed rubber quality, can manage mixed rubber import, and standard market is beaten
Personation mixed rubber is hit, ensures state tax revenue.
Table 1 is the mixed rubber import volume statistical data that Natural Rubber Industry in China association collects from General Administration of Customs.
1 mixed rubber import volume statistical form (2013-2017.03) of table
| Time | 2013 | 2014 | 2015 | 2016 | 2017 (the 1-3 months) |
| Import volume (ten thousand tons) | 7.74 | 6.46 | 53.83 | 181.80 | 53.36 |
Seen from table 1, since 2015, mixed rubber import volume is increased sharply, wherein having quite a few is with mixed rubber
Nominal import natural rubber, to achieve the purpose that tax avoidance.The present invention realizes the identification of isoprene rubber in mixed rubber, makes
Mixed rubber import supervision is possibly realized.
Summary of the invention
In view of the problems of the existing technology, the present invention provides in a kind of judgement mixed rubber whether containing isoprene rubber
Method.
The invention is realized in this way a kind of isoprene rubber catalyst system, the isoprene rubber catalyst system be divided into lithium type,
Titanium-type and terres rares, the characteristic element in catalyst system includes Li, Ti, rare earth element.
Another object of the present invention is to provide a kind of effective detection isoamyl rubbers using the isoprene rubber catalyst system
The method of characteristic element in glue.
Another object of the present invention is to provide in a kind of judgement mixed rubber using the isoprene rubber catalyst system
Whether the method containing isoprene rubber, whether the method containing isoprene rubber includes: in the judgement mixed rubber
Step 1 chooses mixed rubber to be checked；
Step 2, pre-processes mixed rubber, and processing meets ionomer emission spectrum method testing requirements；
Step 3, ionomer emission spectrum method carry out elemental analysis to test mixed rubber；
Step 4, according to elemental analysis as a result, whether judging to test in mixed rubber containing the characteristic element in isoprene rubber
Element.
Further, the ionomer emission spectrum method includes atomic absorption spectrography (AAS) or inductive coupling.
The catalyst system and custom catalysts information that isoprene rubber synthesis process uses are shown in Table 2.
2 isoprene rubber catalyst system of table
Characteristic element in table 2 can remain in isoprene rubber, using atomic absorption spectrography (AAS) or inductively coupled plasma
In body emission spectrometry detection mixed rubber sample whether containing containing these characteristic elements such as Li, Ti, Nd etc. and characteristic element
Whether amount judges in mixed rubber containing isoprene rubber.
In conclusion advantages of the present invention and good effect are as follows: pass through the side of contained characteristic element in detection isoprene rubber
Formula judges in mixed rubber to breach the bottleneck of mixed rubber identification, realize mixed rubber has whether containing isoprene rubber
Qualitative analysis is imitated, method and foundation is provided for the import control of mixed rubber, is conducive to the stabilization for safeguarding mixed rubber market
Development.
Detailed description of the invention
Fig. 1 be in judgement mixed rubber provided in an embodiment of the present invention whether the flow chart of the method containing isoprene rubber.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with example is implemented, to this hair
It is bright to be further elaborated.It should be appreciated that specific implementation example described herein is only used to explain the present invention, not
For limiting the present invention.
Structure of the invention is described in detail with reference to the accompanying drawing；
As shown in Figure 1, in judgement mixed rubber provided by the invention, whether the method containing isoprene rubber includes:
S101: mixed rubber to be checked is chosen；
S102: pretreatment mixed rubber meets ionomer emission spectrum method testing requirements through processing；
S103: ionomer emission spectrum method carries out elemental analysis to test mixed rubber；
S104: according to elemental analysis as a result, whether judging to test in mixed rubber containing the characteristic element in isoprene rubber.
Ionomer emission spectrum method includes atomic absorption spectrography (AAS) or inductive coupling etc.；
Isoprene rubber needs that specific catalyst system is added in the synthesis process, and isoprene rubber catalyst system is divided into lithium type, titanium
Type and terres rares, the characteristic element in these catalyst systems includes Li, Ti, rare earth element etc.；
Atomic absorption spectrography (AAS) or inductively coupled plasma emission spectrography are common elemental analysis method, Neng Gouyou
Characteristic element in effect detection isoprene rubber.
Below with reference to embodiment, the present invention is described in detail；
Embodiment 1 prepares sample, and sample is natural rubber (trade mark SCR 20) and isoprene rubber (trade mark JHIR-70) is mixed
Object, number SCR 20, SCR20-JHIR-10, SCR20-JHIR-20, SCR20-JHIR-30, JHIR-70 are closed, isoprene rubber contains
Amount (mass fraction) is followed successively by 0,10%, 20%, 30%, 100%, is tested using inductively coupled plasma emission spectrography,
Test result is shown in Table 3.
3 inductively coupled plasma atomic emission test data of table
| Serial number | Sample number into spectrum | Isoprene rubber content (mass fraction), % | Neodymium |
| 1 | SCR 20 | 0 | —— |
| 2 | SCR20-JHIR-10 | 10 | 16 |
| 3 | SCR20-JHIR-20 | 20 | 37 |
| 4 | SCR20-JHIR-30 | 30 | 53 |
| 5 | JHIR-70 | 100 | 190 |
Characteristic element neodymium is not detected due to being free of neodymium class catalyst in natural rubber；With isoprene rubber content in mixture
Increase, the neodymium content of detection also successively increases.As it can be seen that can effectively be identified in mixed rubber by way of detecting characteristic element
The presence of isoprene rubber.
Therefore, if stating that certain mixed rubber is the mixture of natural rubber and isoprene rubber, Atomic absorption can be used
Spectroscopic methodology, inductively coupled plasma emission spectrography or other methods that can effectively carry out elemental analysis, produce sample, according to
Operating procedure as defined in corresponding instrument tests and analyzes the element in mixed rubber sample.If effectively detecting sample
In characteristic element in catalyst system containing isoprene rubber, then can determine that in mixed rubber containing isoprene rubber.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (4)
1. a kind of isoprene rubber catalyst system, which is characterized in that the isoprene rubber catalyst system is divided into lithium type, titanium-type and rare earth
Class, the characteristic element in catalyst system includes Li, Ti, rare earth element.
2. a kind of side of the characteristic element in effective detection isoprene rubber using isoprene rubber catalyst system described in claim 1
Method.
3. in a kind of judgement mixed rubber using isoprene rubber catalyst system described in claim 1 whether the side containing isoprene rubber
Method, which is characterized in that whether the method containing isoprene rubber includes: in the judgement mixed rubber
Step 1 chooses mixed rubber to be checked；
Step 2, pre-processes mixed rubber, and processing meets ionomer emission spectrum method testing requirements；
Step 3, ionomer emission spectrum method carry out elemental analysis to test mixed rubber；
Step 4, according to elemental analysis as a result, whether judging to test in mixed rubber containing the characteristic element in isoprene rubber.
4. as claimed in claim 3 determine mixed rubber in whether the method containing isoprene rubber, which is characterized in that the ion
Body emission spectrometry includes atomic absorption spectrography (AAS) or inductive coupling.
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| CN201810649486.XA CN108982381A (en) | 2018-06-22 | 2018-06-22 | In a kind of judgement mixed rubber whether the method containing isoprene rubber |
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| CN201810649486.XA CN108982381A (en) | 2018-06-22 | 2018-06-22 | In a kind of judgement mixed rubber whether the method containing isoprene rubber |
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