CN109116004A - A method of using RPA quantitatively characterizing vulcanizate dynamic power loss density - Google Patents
A method of using RPA quantitatively characterizing vulcanizate dynamic power loss density Download PDFInfo
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- CN109116004A CN109116004A CN201810994722.1A CN201810994722A CN109116004A CN 109116004 A CN109116004 A CN 109116004A CN 201810994722 A CN201810994722 A CN 201810994722A CN 109116004 A CN109116004 A CN 109116004A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000010057 rubber processing Methods 0.000 claims description 11
- 238000004073 vulcanization Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000010092 rubber production Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/445—Rubber
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
Abstract
The present invention relates to a kind of methods using RPA quantitatively characterizing vulcanizate dynamic power loss density, the energy loss density generated in heat development is the ratio of the viscous torque obtained and the product of strain and die cavity sizing material volume during strain sweep, characterizing method provided by the invention is based on classical force theory, simple and easy, test data high reliablity, it can be provided with the data supporting of power for the viscoelastic Journal of Sex Research of rubber, the processing performance to rubber production line can quickly be analyzed in time.
Description
Technical field
The present invention relates to a kind of methods using RPA quantitatively characterizing vulcanizate dynamic power loss density, belong to rubber system
Standby technical field.
Background technique
Rubber is a kind of viscoelastic material, embodies viscosity while demonstrating flexibility again.In tire formulation field, viscoelastic
Property test main means be DMA and RPA, RPA be usually applied to rubber processing performance evaluation evaluation, can be used for vulcanizate
Performance evaluation.The size of formula heat mainly uses 60 DEG C of loss tangent factor t an δ=G "/G ' (G "-shearing loss mould at present
Amount, G '-elastic storage modulus) it is related.It was verified that there are two defects for this description: (1) lacking theoretical basis.The formula
An only indirectly description, without strict derivation.(2) accuracy is poor.Identical tan δ value can be damaged by different shearings
It consumes modulus and elastic storage modulus ratio obtains.(3) tan δ test result and compression heat generation test result error are big.(4) belong to
Qualitative analysis means.
Summary of the invention
The purpose of the present invention is to solve above-mentioned technical problems, provide a kind of dynamic using RPA quantitatively characterizing vulcanizate
The method of state energy loss density, this method is efficiently, accurately.The data that this method is obtained by RPA test platform pass through calculating
Dynamic power loss density, direct quantitative assessment formula dynamic heat build up size.This method is raw suitable for tire different location formula
The qualitative measurement of hot size tries.
The present invention adopts the following technical scheme: a kind of side using RPA quantitatively characterizing vulcanizate dynamic power loss density
Method, the energy loss density are calculated using following formula
Wherein, E " is loss of energy density/Jm-3, S " is viscous torque/Nm, and ε is strain/%, and V is die cavity sizing material
Volume, the die cavity sizing material volume are fixed value 4.5cm3, using when RPA rubber processing instrument test sample through over cure, cooling,
3 processes of strain sweep, S " are that RPA rubber processing instrument measures during strain sweep.
Further, the vulcanization test condition when RPA rubber processing instrument is tested are as follows: scan frequency 0.5-10Hz,
Scanning strain is 0.5-50%, and curing temperature is 150-170 DEG C, and vulcanization time is 5-20 minutes, cures raw material rubber.
Further, the strain sweep condition when RPA rubber processing instrument is tested is frequency 1-20Hz, and strain stress is
0.2-50% obtains corresponding viscous torque S ".
Characterizing method provided by the invention is based on classical force theory, simple and easy, test data high reliablity, Neng Gouwei
The viscoelastic research of rubber provides strong data supporting, the processing performance to rubber production line can quickly be divided in time
Analysis.
Detailed description of the invention
Fig. 1 is in the present invention using the sulfidation of RPA rubber processing instrument test.
Fig. 2 is in the present invention using the temperature-fall period of RPA rubber processing instrument test.
Fig. 3 is in the present invention using the strain sweep of RPA rubber processing instrument test.
Specific embodiment
It is tested using RPA rubber processing instrument:
(1) tyre surface sample vulcanization scanning:
As shown in Figure 1, scan frequency 1Hz, scanning strain is 1%, conditions of vulcanization: 170 DEG C of * 10min；
(2) temperature scanning:
As shown in Fig. 2, scan frequency 1Hz, scanning strain is 1%, scanning temperature: 170 DEG C, 60 DEG C；
(3) strain sweep:
As shown in Figure 3: scanning temperature 60 C, scan frequency 1Hz, scanning strain are 0.2-20%；Usual tread glue formula
Deformation in the lower torque S " of 5% or so, 5% strain be 2.31dNm.
According to formula (1)；E "=2.31*10-1* 5%/4.5*10-6J·m-3=2.57kJm-3。
Therefore, tread rubber dynamic heat build up energy loss density under 5% strain is 2.57kJm-3。
Claims (3)
1. a kind of method using RPA quantitatively characterizing vulcanizate dynamic power loss density, it is characterized in that: the energy loss is close
Degree is calculated using following formula
Wherein, E " is loss of energy density/Jm-3, S " is viscous torque/Nm, and ε is strain/%, and V is die cavity sizing material volume,
The die cavity sizing material volume is fixed value 4.5cm3, using when RPA rubber processing instrument test sample through over cure, cooling, strain
3 processes are scanned, S " is that RPA rubber processing instrument measures during strain sweep.
2. the method for quantitatively characterizing vulcanizate dynamic power loss as described in claim 1, it is characterized in that: the RPA rubber
Process vulcanization test condition when instrument test are as follows: scan frequency 0.5-10Hz, scanning strain is 0.5-50%, and curing temperature is
150-170 DEG C, vulcanization time is 5-20 minutes, vulcanizes raw material rubber.
3. the method for quantitatively characterizing vulcanizate dynamic power loss as described in claim 1, it is characterized in that: the RPA rubber
Strain sweep condition when processing instrument test is frequency 1-20Hz, and strain stress 0.2-50% obtains corresponding viscous torque
S”。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810994722.1A CN109116004B (en) | 2018-08-29 | 2018-08-29 | Method for quantitatively representing dynamic energy loss density of vulcanized rubber by adopting RPA (resilient reactive powder) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810994722.1A CN109116004B (en) | 2018-08-29 | 2018-08-29 | Method for quantitatively representing dynamic energy loss density of vulcanized rubber by adopting RPA (resilient reactive powder) |
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| Publication Number | Publication Date |
|---|---|
| CN109116004A true CN109116004A (en) | 2019-01-01 |
| CN109116004B CN109116004B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810994722.1A Active CN109116004B (en) | 2018-08-29 | 2018-08-29 | Method for quantitatively representing dynamic energy loss density of vulcanized rubber by adopting RPA (resilient reactive powder) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596359A (en) * | 2019-10-15 | 2019-12-20 | 中国热带农业科学院农产品加工研究所 | Method for judging raw rubber processing performance of natural rubber |
| CN113933179A (en) * | 2021-10-13 | 2022-01-14 | 中国科学院长春应用化学研究所 | Mechanical property prediction method for rubber material non-isothermal vulcanization |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596359A (en) * | 2019-10-15 | 2019-12-20 | 中国热带农业科学院农产品加工研究所 | Method for judging raw rubber processing performance of natural rubber |
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| CN113933179A (en) * | 2021-10-13 | 2022-01-14 | 中国科学院长春应用化学研究所 | Mechanical property prediction method for rubber material non-isothermal vulcanization |
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