CN105527194B - Method for detecting processability of rubber for tire - Google Patents
Method for detecting processability of rubber for tire Download PDFInfo
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- CN105527194B CN105527194B CN201610004850.8A CN201610004850A CN105527194B CN 105527194 B CN105527194 B CN 105527194B CN 201610004850 A CN201610004850 A CN 201610004850A CN 105527194 B CN105527194 B CN 105527194B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
the invention relates to a method for detecting the processing performance of rubber for a tire, which comprises the following steps of (1) carrying out Mooney viscosity test on a raw rubber sample by using a Mooney viscometer, (2) cutting the same raw rubber sample with similar Mooney viscosity values tested in the step (1), putting the cut raw rubber sample into a torque rheometer, and fitting a power law equation of the raw rubber sample, wherein lg η is (A +/-0.03) lg gamma + (B +/-0.06), and (3) meeting the power law equation of the raw rubber sample in the step (2), so that the rheological performance of the rubber for the tire is qualified.
Description
Technical field
The present invention relates to a kind of tyre rubber detection method, more particularly to a kind of detection of tyre rubber processing characteristics
Method.
Background technology
The index that synthetic rubber processing characteristics is investigated in tyre industry is the Mooney viscosity value of rubber, and different manufacturers, no
With the rubbery system material of the same race of batch, processing characteristics there may be difference in actual applications, cause the quality of glue stuff compounding
Unqualified phenomenon.Specifically, because the test condition of Mooney viscosity value is single, temperature is 100 DEG C, rotor speed 2r/min,
That is shear rate is in 1.31/s or so, but temperature in actual production and shear rate are changes, and than Mooney viscosity
The temperature and shear rate of test are high, so the Mooney viscosity value of material is determined under the conditions of single reaction material to exist well
Performance in process, different manufacturers similar in Mooney viscosity value often occur in actual production, or it is same
The rubber material of the same race of the different batches of producer, glue stuff compounding Mooney viscosity differ greatly, and processing characteristics has showing for larger difference
As.
Therefore, it is necessary to propose effective technical scheme, solve the above problems.
The content of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of inspection of the high tyre rubber processing characteristics of accuracy
Survey method.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of detection method of tyre rubber processing characteristics, the detecting step of methods described are as follows：
(1) Mooney viscosity test is carried out using mooney's viscosimeter to rubber sample；The rubber sample is selected from synthesis of the same race
The product for the different batches that the different suppliers of rubber or same provider provide；The rubber sample is at least 50 groups；
(2) after to rubber sample of the same race is cut similar in the Mooney viscosity value that is tested out in step (1), it is put into torque rheology
In instrument；
The rate of specific gravity of rubber sample is inputted on torque rheometer, the extrusion quality under each speed is weighed, records apparent
The numerical value of viscosity and shear stress, according to the numerical value of shear rate and apparent viscosity, fit the power-law equation of rubber sample；
The power-law equation is as follows：
Lg η=(A ± 0.03) lg γ+(B ± 0.06)
In formula, η is apparent viscosity, and γ is shear rate, and A n-1, the n are non-newtonian index, B lgK, the K
Apparent viscosity when for shear rate being 0；
(3) power-law equation of step (2) the rubber sample is met, then the rheological property of the tyre rubber is qualified；
The power-law equation of step (2) the rubber sample is unsatisfactory for, then the rheological property of the tyre rubber is unqualified.
Preferably, the torque rheometer is Single screw extrusion, capillary die, and the specification of capillary die is L/D=
10th, L/D=20, L/D=30, L/D=40, the rotating speed of extrusion screw rod are 1r/min~30r/min, extrusion temperature is 110 DEG C~
170 DEG C, and each rate of extrusion lower retention time is 60s.
Preferably, the rubber sample is natural rubber or synthetic rubber；The synthetic rubber is butadiene rubber, butylbenzene rubber
Glue, ethylene propylene diene rubber or butyl rubber.
Preferably, the butadiene-styrene rubber is solution polymerized butadiene styrene rubber or emulsion polymerized styrene butadiene rubber.The solution polymerized butadiene styrene rubber is non-
Oil-filled solution polymerized butadiene styrene rubber or oil-filled solution polymerized butadiene styrene rubber, the emulsion polymerized styrene butadiene rubber are non-oil-filled emulsion polymerized styrene butadiene rubber or oil-filled
Emulsion polymerized styrene butadiene rubber.
Preferably, the torque rheometer is mixing type torque rheometer.
Beneficial effect：
The present invention is examined using rubber system material similar in torque rheometer capillary extrusion method detection Mooney viscosity value
Examine rubber in actual applications under the different shear rate such as mixer mixing, extrusion rubber apparent viscosity, with existing method phase
Than this method is more accurate to the result of actual production.
Corresponding equation is fitted for the synthetic rubber of the same race of different manufacturers, different batches, detects this kind of material in reality
Processing characteristics in production, meet equation material be considered as its elastomeric compound processing characteristics it is close, during following process not
Adjusting process is needed, is unsatisfactory for the material of equation, although Mooney viscosity is close, needs to carry out suitably during actual processing
The adjustment of process conditions.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is apparent viscosity and the shearing of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the bright and beautiful lake petrochemical industry of the embodiment of the present invention 1
The log-log graph of speed；
Fig. 2 is apparent viscosity and the shearing of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Qilu Petrochemical of the embodiment of the present invention 2
The log-log graph of speed；
Fig. 3 is apparent viscosity and the shearing of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Yangtze petrochemical industry of the embodiment of the present invention 3
The log-log graph of speed；
Fig. 4 is apparent viscosity and the shearing of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Jilin Petrochemical of the embodiment of the present invention 4
The log-log graph of speed；
The apparent viscosity that Fig. 5 is the oil-filled solution polymerized butadiene styrene rubber 6270M of the bright and beautiful lake petrochemical industry of the embodiment of the present invention 5 and shearing speed
The log-log graph of rate；
Fig. 6 is the apparent viscosity and shear rate of the oil-filled solution polymerized butadiene styrene rubber 2550 of the LG chemistry of the embodiment of the present invention 6
Log-log graph.
Embodiment
The present invention relates to a kind of detection method of tyre rubber processing characteristics, the detecting step of methods described are as follows：
(1) Mooney viscosity test is carried out using mooney's viscosimeter to rubber sample；The rubber sample is selected from rubber of the same race
Different suppliers or same provider provide different batches product；The rubber sample is at least 50 groups；
(2) (the close interval value for referring to standard value ± 3) close to the Mooney viscosity value tested out in step (1)
Rubber sample of the same race cut after, be put into torque rheometer；
The rate of specific gravity of rubber sample is inputted on torque rheometer, the extrusion quality under each speed is weighed, records apparent
The numerical value of viscosity and shear stress, according to the numerical value of shear rate and apparent viscosity, fit the power-law equation of rubber sample；
The power-law equation is as follows：
Lg η=(A ± 0.03) lg γ+(B ± 0.06)
In formula, η is apparent viscosity, and γ is shear rate, and A n-1, the n are non-newtonian index, B lgK, the K
Apparent viscosity when for shear rate being 0；
(3) power-law equation of step (2) the rubber sample is met, then the rheological property of the tyre rubber is qualified；
The power-law equation of step (2) the rubber sample is unsatisfactory for, then the rheological property of the tyre rubber is unqualified.
As one embodiment of the present of invention, the torque rheometer is Single screw extrusion, capillary die；It is wherein following
The use of parameter, be for the degree of accuracy for the detection method of tyre rubber processing characteristics of the present invention it is important, specifically：
The specification of capillary die is L/D=10, L/D=20, L/D=30, L/D=40, the rotating speed of extrusion screw rod for 1r/min~
30r/min, extrusion temperature are 110 DEG C~170 DEG C, and each rate of extrusion lower retention time is 60s.The present invention uses torque
Rheometer capillary extrusion pattern can measure different temperatures, shear stress and apparent viscosity under different shear rate, pass through
The rotating speed of screw rod and the capillary using different draw ratios are set, 0~500S can be reached-1Shear rate, banburying can be covered
Machine is kneaded and the scope of the shear rate of extrusion process, according to many experiments, draws not same material power-law equation and is
Number scope, processing stability energy of the Accurate Prediction rubber in actual production.
As one embodiment of the present of invention, the rubber sample is natural rubber or synthetic rubber；The synthetic rubber
For butadiene rubber, butadiene-styrene rubber, ethylene propylene diene rubber or butyl rubber.Preferably, the butadiene-styrene rubber is solution polymerized butadiene styrene rubber
Or emulsion polymerized styrene butadiene rubber；Preferably, the solution polymerized butadiene styrene rubber is non-oil-filled solution polymerized butadiene styrene rubber or oil-filled solution polymerized butadiene styrene rubber,
The emulsion polymerized styrene butadiene rubber is non-oil-filled emulsion polymerized styrene butadiene rubber or oil-filled emulsion polymerized styrene butadiene rubber.
Tyre rubber is typical polymer, and with the increase of shear rate, the apparent viscosity of polymer reduces, this
Phenomenon is referred to as " shear shinning " behavior (shear-thinning), generally claims pseudoplastic behavior the fluid with " shear shinning " effect
Fluid (pseudoplastic fluid).The flowing law of pseudoplastic fluid meets Ostwald-de Wale power-law equations
(power law)：
After both sides are taken the logarithm：
Lg η=lgK+ (n-1) lg γ
Wherein η is apparent viscosity, and γ is shear rate, and A n-1, wherein n are non-newtonian index, and B lgK, wherein K are
Apparent viscosity when shear rate is 0, referred to as viscosity constant.
By carrying out rheology testing to rubber not of the same race, corresponding shear rate and apparent viscosity value are drawn, it is right
After the two takes double-log, corresponding power-law equation is fitted；Fitting result shows that Mooney viscosity is close, fabrication process condition identical
Different manufacturers, the rubber of the same race of different batches meet power-law equation lg η=(A ± 0.03) lg γ+(B ± 0.06), meet the party
Processing characteristics is stable in use for the rubber of journey；The material of the equation is unsatisfactory for, it is necessary to be carried out in advance according to actual conditions
The adjustment of working process parameter.I.e. using rubber material similar in torque rheometer capillary extrusion method detection Mooney viscosity value
Material, predicts processing characteristics of this kind of material in actual production.
The different batches of rubber not of the same race or rubber of the same race are respectively provided with different A values and B values, but rubber material of the same race has
Certain A values and B values, for all rubber materials：A values scope be standard value ± 0.03, B value scope be standard value ±
0.06。
The test reference standards of GB/T 1232.1 of the crude rubber Mooney viscosity, are measured using disk shearing viscosimeter,
The principle of measurement is：At 100 DEG C, 1min is preheated, heats 4min, rotor speed is the torque value under the conditions of 2r/min, i.e. Mooney
The variable of viscosity.
It is described that tire is extruded with rubber using torque rheometer capillary extrusion pattern, by torque rheometer temperature
The temperature value pre-set is raised to, 110 DEG C~170 DEG C of screw rod and extrusion neck ring mold temperature are set according to different glue kinds, extrusion is set
Rate program and time, screw speed is set to the extent of reaction of temperature and shearing force according to rubber species, it is ensured that shear rate
Cover actual production medium shear rate scope, after treating the pre- thermostabilization of equipment, rubber to be measured is cut into slice, from high length-diameter ratio
(L/D=40) capillary die starts to test, the quality of record extrusion sample, the numerical value of apparent viscosity and pressure.
The method of testing is tested using torque rheometer, and the equipment can be applied to rubber compounding, tire half simultaneously
Part extrusion simulation, has wide range of applications, and all referring to actual processing production and application between guide-car.
In order to deeper into understanding synthetic rubber processing characteristics, only by detection rubber Mooney viscosity value can not be completely anti-
The performance of material is reflected, capillary rheometer can carry out the comparison of polymer different structure, and similar polymers are due to molecule
Chain structure is different, such as linear, side chain length, block structure, be reflected on capillary rheometer will appear as shear stress with
The difference of apparent viscosity.
As one embodiment of the present of invention, the torque rheometer is a kind of more work(to be kneaded type torque rheometer
Can interchangeable building block system torque detection instrument, including small size closed blender, small-sized screw extruder and different types of squeeze
Outlet mold.The extrusion neck ring mold that the present invention uses is slit capillary die, i.e. torque rheometer capillary extrusion pattern, can be with mould
The actual processing process of rubber is fitted to, characterizes the processing rheological property of synthetic rubber.
The power-law equation embodiment of specific rubber material is listed below, so that the present invention is described further, but this hair
Bright protection domain is not limited to that：
Embodiment 1：
The non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of bright and beautiful lake petrochemical industry is taken, the Mooney viscosity value of rubber is measured using mooney's viscosimeter
(100 DEG C of ML1+4), is then cut into strip by rubber sample, in torque rheometer Single screw extrusion, the pattern of capillary die
Under tested, the specification of capillary die is L/D=20, L/D=30, L/D=40, sets screw rod and extrusion neck ring mold temperature
For 150 DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/
Min, and each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion matter under each speed
Amount, the numerical value of shear stress and apparent viscosity is recorded, according to the numerical value of apparent viscosity and shear rate, draw the power law of the material
Equation such as table 1.Fig. 1 show the apparent viscosity of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the bright and beautiful lake petrochemical industry of the embodiment of the present invention 1
With the log-log graph of shear rate.
Embodiment 2：
The non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of Qilu Petrochemical is taken, the Mooney viscosity value of rubber is measured using mooney's viscosimeter
(100 DEG C of ML1+4), is then cut into strip by rubber sample, in torque rheometer Single screw extrusion, the pattern of capillary die
Under tested, the specification of capillary die is L/D=20, L/D=30, L/D=40, sets screw rod and extrusion neck ring mold temperature
For 150 DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/
Min, and each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion matter under each speed
Amount, draws shear stress and the numerical value of apparent viscosity, according to the numerical value of apparent viscosity and shear rate, draws the power of synthetic rubber
Restrain equation such as table 1.Fig. 2 show the apparent viscous of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Qilu Petrochemical of the embodiment of the present invention 2
Degree and the log-log graph of shear rate.
Embodiment 3：
The non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of Yangtze petrochemical industry is taken, the Mooney viscosity value of rubber is measured using mooney's viscosimeter
(100 DEG C of ML1+4), is then cut into strip by rubber sample, in torque rheometer Single screw extrusion, the pattern of capillary die
Under tested, the specification of capillary die is L/D=20, L/D=30, L/D=40, sets screw rod and the extrusion neck ring mold temperature to be
150 DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/
Min, and each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion matter under each speed
Amount, the numerical value of shear stress and apparent viscosity is recorded, according to the numerical value of apparent viscosity and shear rate, draw the power law of the material
Equation such as table 1.Fig. 3 show the apparent viscosity of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Yangtze petrochemical industry of the embodiment of the present invention 3
With the log-log graph of shear rate.
Embodiment 4：
The non-oil-filled emulsion polymerized styrene butadiene rubber 1500E of Jilin Petrochemical is taken, the Mooney viscosity of rubber is measured using mooney's viscosimeter
It is worth (100 DEG C of ML1+4), rubber sample is then cut into strip, in torque rheometer Single screw extrusion, the mould of capillary die
Tested under formula, the specification of capillary die is L/D=20, L/D=30, L/D=40, sets screw rod and extrusion neck ring mold temperature
To spend for 150 DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min,
30r/min, and each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion under each speed
Quality, the numerical value of shear stress and apparent viscosity is recorded, according to the numerical value of apparent viscosity and shear rate, draw the power of the material
Restrain equation such as table 1.Fig. 4 show the apparent viscous of the non-oil-filled emulsion polymerized styrene butadiene rubber 1502 of the Jilin Petrochemical of the embodiment of the present invention 4
Degree and the log-log graph of shear rate.
Embodiment 5：
The oil-filled solution polymerized butadiene styrene rubber 6270M of bright and beautiful lake petrochemical industry is taken, the Mooney viscosity value of rubber is measured using mooney's viscosimeter
(100 DEG C of ML1+4), is then cut into strip by rubber sample, in torque rheometer Single screw extrusion, the pattern of capillary die
Under tested, the specification of capillary die is L/D=20, L/D=30, L/D=40, sets screw rod and extrusion neck ring mold temperature
For 150 DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/
Min, and each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion matter under each speed
Amount, the numerical value of shear stress and apparent viscosity is recorded, according to the numerical value of apparent viscosity and shear rate, draw the power law of the material
Equation such as table 1.Fig. 5 show the oil-filled solution polymerized butadiene styrene rubber 6270M of the bright and beautiful lake petrochemical industry of the embodiment of the present invention 5 apparent viscosity with
The log-log graph of shear rate.
Embodiment 6：
The oil-filled solution polymerized butadiene styrene rubber 2550 of LG chemistry is taken, the Mooney viscosity value (ML1 of rubber is measured using mooney's viscosimeter
+ 4 100 DEG C), rubber sample is then cut into strip, entered under torque rheometer Single screw extrusion, the pattern of capillary die
Row test, the specification of capillary die is L/D=20, L/D=30, L/D=40, and it is 150 to set screw rod and extrusion neck ring mold temperature
DEG C, the rate of extrusion of single screw rod is 1r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/min,
And each rate of extrusion lower retention time is 60s, inputs the rate of specific gravity of rubber, weighs the extrusion quality under each speed, is remembered
The numerical value of shear stress and apparent viscosity is recorded, according to the numerical value of apparent viscosity and shear rate, draws the power-law equation of the material
Such as table 1.Fig. 6 show the apparent viscosity and shearing speed of the oil-filled solution polymerized butadiene styrene rubber 2550 of the LG chemistry of the embodiment of the present invention 6
The log-log graph of rate.
The Mooney viscosity and power-law equation contrast table of the butadiene-styrene rubber of the different manufacturers of table 1
As it can be seen from table 1 the SBR1502 (containing 1500E) of four producers in embodiment 1- embodiments 4 Mooney glues
Angle value difference does not carry out during the use of workshop the adjustment of process conditions within 5%, by capillary extrusion test
Afterwards, the shear rate and apparent viscosity value of polymer melt are drawn, after taking double-log, draws lg η=(n-1) lg γ+lgK,
Wherein n-1=A ± 0.03, lgK=B ± 0.06, the different manufacturers SBR1502 shear rates and apparent viscosity drawn according to detection
After value, A=-0.61, B=4.68 are drawn.
The Mooney viscosity difference of both oil-filled solution polymerized butadiene styrene rubbers of embodiment 5 and embodiment 6 also within 5%, meets
The power-law equation of the oil-filled solution polymerized butadiene styrene rubber (butadiene content 23.5%, oil-filled is 37.5phr) of workshop steady production is lg
The power-law equation of η=(- 0.80 ± 0.03) lg γ+(4.83 ± 0.06), example 5 and example 6 is in described power-law equation scope
It is interior.
In the present invention, the process of specific the Fitting Calculation needs to apply to Matlab or similar functions software, utilizes minimum
Square law determines to differ minimum fitted data with actual value.
The present invention can be summarized with others without prejudice to the concrete form of the spirit or essential characteristics of the present invention.Therefore, nothing
By from the point of view of which point, the embodiment above of the invention can only all be considered the description of the invention and can not limit this hair
Bright, claims indicate the scope of the present invention, and above-mentioned explanation does not point out the scope of the present invention, therefore, with this
In claims of invention suitable implication and scope
Any change, all it is considered as being included in the range of claims of the present invention.
Claims (5)
1. a kind of detection method of tyre rubber processing characteristics, it is characterised in that the detecting step of methods described is as follows：
(1) Mooney viscosity test is carried out using mooney's viscosimeter to rubber sample；
(2) after to rubber sample of the same race is cut similar in the Mooney viscosity value that is tested out in step (1), it is put into torque rheometer
In；The rate of specific gravity of rubber sample is inputted on torque rheometer, weighs the extrusion quality under each speed, record apparent viscosity and
The numerical value of shear stress, according to the numerical value of shear rate and apparent viscosity, fit the power-law equation of rubber sample；
The power-law equation is as follows：
Lg η=(A ± 0.03) lg γ+(B ± 0.06)
In formula, η is apparent viscosity, and γ is shear rate, and A n-1, the n are non-newtonian index, and B lgK, the K are shearing
Apparent viscosity when speed is 0；
(3) power-law equation of step (2) the rubber sample is met, then the rheological property of the tyre rubber is qualified；It is discontented
The power-law equation of sufficient step (2) the rubber sample, then the rheological property of the tyre rubber is unqualified.
2. the detection method of tyre rubber processing characteristics as claimed in claim 1, it is characterised in that the torque rheometer
For Single screw extrusion, capillary die, the specification of capillary die is L/D=10, L/D=20, L/D=30, L/D=40, is squeezed
The rotating speed for going out screw rod is 1r/min~30r/min, and extrusion temperature is 110 DEG C~170 DEG C, and when being kept under each rate of extrusion
Between be 60s.
3. the detection method of tyre rubber processing characteristics as claimed in claim 1 or 2, it is characterised in that the rubber sample
Product are natural rubber or synthetic rubber；The synthetic rubber is butadiene rubber, butadiene-styrene rubber, ethylene propylene diene rubber or butyl rubber
Glue.
4. the detection method of tyre rubber processing characteristics as claimed in claim 3, it is characterised in that the butadiene-styrene rubber is
Solution polymerized butadiene styrene rubber or emulsion polymerized styrene butadiene rubber；The solution polymerized butadiene styrene rubber is non-oil-filled solution polymerized butadiene styrene rubber or oil-filled solution polymerized butylbenzene
Rubber, the emulsion polymerized styrene butadiene rubber are non-oil-filled emulsion polymerized styrene butadiene rubber or oil-filled emulsion polymerized styrene butadiene rubber.
5. the detection method of tyre rubber processing characteristics as claimed in claim 1 or 2, it is characterised in that the torque flow
Become instrument to be kneaded type torque rheometer.
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| CN201610004850.8A CN105527194B (en) | 2016-01-05 | 2016-01-05 | Method for detecting processability of rubber for tire |
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| US6412337B1 (en) * | 2000-01-28 | 2002-07-02 | Polyvalor S.E.C. | Apparatus and method for measuring the rheological properties of a power law fluid |
| CN103353433A (en) * | 2013-07-03 | 2013-10-16 | 天津大学 | Method for testing wall slip length of polymer under dynamic rheological conditions |
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2016
- 2016-01-05 CN CN201610004850.8A patent/CN105527194B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6412337B1 (en) * | 2000-01-28 | 2002-07-02 | Polyvalor S.E.C. | Apparatus and method for measuring the rheological properties of a power law fluid |
| CN103353433A (en) * | 2013-07-03 | 2013-10-16 | 天津大学 | Method for testing wall slip length of polymer under dynamic rheological conditions |
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