CN110346549A - A kind of evaluation method of modified gutta-percha shape-memory properties - Google Patents
A kind of evaluation method of modified gutta-percha shape-memory properties Download PDFInfo
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- CN110346549A CN110346549A CN201910756242.6A CN201910756242A CN110346549A CN 110346549 A CN110346549 A CN 110346549A CN 201910756242 A CN201910756242 A CN 201910756242A CN 110346549 A CN110346549 A CN 110346549A
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- 239000000899 Gutta-Percha Substances 0.000 title claims abstract description 37
- 240000000342 Palaquium gutta Species 0.000 title claims abstract description 37
- 229920000588 gutta-percha Polymers 0.000 title claims abstract description 37
- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000000399 optical microscopy Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 18
- 229920000431 shape-memory polymer Polymers 0.000 abstract description 16
- 238000010998 test method Methods 0.000 abstract description 5
- 238000011017 operating method Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000012669 compression test Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000010426 asphalt Substances 0.000 description 6
- 230000007334 memory performance Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 239000012781 shape memory material Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- 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
- G01N33/42—Road-making materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0012—Constant speed test
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0266—Cylindrical specimens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The present invention is a kind of evaluation method of modified gutta-percha shape-memory properties, belong to material property assessment technique field, it solves to lack gutta-percha shape-memory properties evaluation method at present, and the shape-memory properties test method of shape-memory polymer is single, the problem of test material preparation process and operating method are cumbersome, are unfavorable for experimental implementation.The method comprises the steps of firstly, preparing the modified gutta-percha of shape memory out, and are made into cylinder test specimen；Then, compression test is carried out using pertinent instruments, and measures the height of specimen after being modified gutta-percha compression under different operation step and replying；Finally, evaluating its shape-memory properties with shape fixed rate and shape recovery rate, and on this basis, modified Cortex Eucommiae glue formula is advanced optimized.Shape-memory properties evaluation method provided by the invention, that is, solve lacking for modified gutta-percha shape-memory properties test method, and enriches the shape-memory properties evaluation method of shape-memory polymer.
Description
Technical field
The present invention is a kind of evaluation method of modified gutta-percha shape-memory properties, belongs to material property assessment technique neck
Domain.
Background technique
In recent years, it is constantly progressive with the development of science and technology with human society, production and life of the material in the mankind
In play increasingly important role, requirement of the people for material is also higher and higher, has derived various new materials, shape note
Recalling material is exactly Typical Representative therein.Due to haveing excellent performance, have a extensive future, shape-memory material has obtained various countries energetically
Development.Shape-memory material refers under the stimulation of extraneous environmental change (such as heat, light, electricity, magnetic, solvent), responds, makes
State parameter (such as shape, stress and strain) derived from body changes, and is restored to a kind of macromolecule of initial setting state
Material.Including shape memory ceramics, marmem, shape-memory polymer etc..
With the continuous deepening of research, shape-memory polymer is due to excellent shape memory effect, in machine-building, electricity
The numerous areas such as sub- communication, printing packaging, health care, articles for daily use, style entertainment, aerospace, civil construction obtain
It is widely applied, such as automatic open close valve, Waterproof connector of cable, heat-shrinkable film, correction material, portable kitchenware, sport protection
Equipment, space deployable structure are connected with reduced pipe.Although researcher has shape-memory polymer more deep
Research and understand, using also having obtained large development.However, shape-memory polymer is used as and is changed in field of road construction
Property agent is added in asphalt or pavement maintenance material, to improve asphalt material shape-memory properties, plays automatic contracting
Small or even closure microcrack self-healing effect, reduces Asphalt Pavement Damage with this and generates, be but seldom mentioned or further investigate.
The study found that being difficult to can be carried out the shape memory of shape-memory polymer the formula of accurate quantification or intuitive
Description, the complicated microcosmos structure characteristic itself having and Viscoelastic Mechanics behavior, be easy when along with test by external environment because
The influence of element causes current shape-memory polymer shape-memory properties evaluation method to be difficult to be more convenient, is more objective, more accurately
Evaluate the shape-memory properties of modified gutta-percha.Meanwhile shape is had focused largely on to the research of shape-memory material both at home and abroad at present
The exploitation of shape memory polymers species and a variety of driving methods of its shape memory effect are explored.Associated shape memory performance
Evaluation method is also limited only to polymer itself, and does not expand to its application field.It is corresponding, it causes in bituminous pavement
Maintenance and care field lack effective method and remove evaluation asphalt material shape-memory properties, cause to be difficult to research and develop and can drip
There is shape-memory material at a temperature of green pavement usage, improve pitch self-healing function and pavement durability.
In recent years, gutta-percha study on the modification is found, modification side is crosslinked etc. by vulcanization, grafting and peroxide, bubble
Formula, thus it is possible to vary gutta-percha crystalline state itself and performance.When being blended with other materials, it can be used as modifying agent, improved other
Substance performance and development.It, under certain condition, can be with modified pitch when taking the treatment process such as vulcanization, grafting.It studies simultaneously
Show gutta-percha or a kind of typical shape-memory material, using made from sulphur or peroxide crosslinking there is chemistry to hand over
It is coupled the gutta-percha of structure, is in crystalline state always at use temperature in bituminous pavement, there are shape-memory properties.
But existing research is found, lacks gutta-percha shape-memory properties test method at present, about shape memory polymers
The shape-memory properties test method of object is more single, and usually test, the test material preparation process such as stretching, fatigue, bending are more multiple
Miscellaneous, operating method is relatively complicated, is unfavorable for experimental implementation.
The present invention provides a kind of evaluation method of modified gutta-percha shape-memory properties, using universal testing machine to changing
Property gutta-percha carry out compression test, and the test specimen after measuring the modified gutta-percha compression under different operation step and replying is high
Degree characterizes modified gutta-percha shape memory with shape fixed rate, shape recovery rate and replys effect, it is poly- thus to enrich shape memory
Object shape-memory properties evaluation method is closed, and more objectively evaluates the shape-memory properties of modified gutta-percha.
Summary of the invention
(1) technical problem
It is an object of the present invention to provide a kind of evaluation method of modified gutta-percha shape-memory properties, solve to lack Cortex Eucommiae at present
The evaluation method of glue shape-memory properties and the shape-memory properties test method of shape-memory polymer are more single, examination
The problem of part preparation process and operating method are relatively complicated, are unfavorable for experimental implementation.
(2) technical solution
In order to solve to lack at present the evaluation method of gutta-percha shape-memory properties and the shape of shape-memory polymer
The problem of memory performance test method is more single, and test material preparation process and operating method are relatively complicated, is unfavorable for experimental implementation.
The present invention provides a kind of evaluation method of modified gutta-percha shape-memory properties, and its technical solution is as follows: firstly, preparing shape
Remember modified gutta-percha, and be made into cylinder test specimen, carries out compression test using universal testing machine；Secondly, by
Heating and load stop load when test specimen is compressed to certain prestrain, after maintaining a period of time, stop heating, measurement examination
Height of specimen when part naturally cools to room temperature under dead load later；Then, it is put at room temperature after successively measuring removal load
It sets, and uses the height of specimen after conserving in the consistent environmental cabinet of temperature with bituminous pavement；Finally, with shape fixed rate and shape
Shape response rate evaluates the shape-memory properties of modified gutta-percha, and on this basis, advanced optimizes modified Cortex Eucommiae glue formula.
(3) beneficial effect
In recent years, shape-memory polymer is quickly grown, and is widely applied in numerous areas.Pavement material studies people
Member wishes for shape-memory polymer to be applied in field of road construction, is added to pitch and its mixture as modifying agent
In, material shape memory performance is assigned, self-healing effect is played, Asphalt Pavement Damage is reduced and generates or influence.The study found that adopting
There is the gutta-percha of chemical crosslinking structure made from sulphur or peroxide crosslinking, locate always at use temperature in bituminous pavement
In crystalline state, there are shape-memory properties, be a kind of good shape-memory polymer.
The present invention provides a kind of evaluation method of modified gutta-percha shape-memory properties, on the one hand solves current gutta-percha shape
Shape memory performance test method lacks, while the shape-memory properties evaluation method of abundant shape-memory polymer；Another party
Face, determining has the modification Cortex Eucommiae glue formula of optimum shape memory performance, is added to it in pitch or pavement maintenance material, assigns
Asphalt material shape-memory properties are given, good self-healing effect is played.
Specific embodiment
The present invention provides a kind of evaluation method of modified gutta-percha shape-memory properties, and specific implementation step is as follows:
(1) according to bituminous pavement use temperature range, the modification gutta-percha of different dibenzoyl peroxide additive amounts is prepared,
It is set, at use temperature always in crystallization transition, to there are shape-memory properties in bituminous pavement；
(2) modified gutta-percha is prepared into diameter is 15mm, the cylinder test specimen of a height of 40mm, by modified gutta-percha test specimen
It is placed in universal testing machine to be compressed, setting environment the temperature inside the box is consistent with bituminous pavement use temperature range；
(3) it after test specimen heat preservation 15min, is compressed with 0.1mm/min loading speed, height of specimen is observed, when test specimen quilt
When being compressed to certain prestrain, stop load, maintain temperature and load 30min, stops heating, make test specimen load action at this moment
Under naturally cool to room temperature, measure height of specimen, be recorded as l1；
(4) removal load, after test specimen being placed at room temperature on experimental bench for 24 hours, measurement height of specimen is l2；
(5) test specimen is put into bituminous pavement using 1h is kept the temperature in the consistent environmental cabinet of temperature, returns the abundant shape of test specimen
It is multiple, situation is replied using optical microphotograph sem observation, height of specimen is l after measurement is replied3；
(6) the shape fixed rate and shape recovery rate for calculating modified gutta-percha evaluate its shape-memory properties, wherein use
(40-l2)/(40-l1) shape fixed rate is calculated, using (l3-l2)/(40-l2) shape recovery rate is calculated, and on this basis, into
One-step optimization is modified Cortex Eucommiae glue formula.
Claims (1)
1. a kind of evaluation method of modified gutta-percha shape-memory properties, it is characterised in that specific step is as follows for this method:
(1) according to bituminous pavement use temperature range, the modification gutta-percha of different dibenzoyl peroxide additive amounts is prepared, it is made
In bituminous pavement at use temperature always in crystallization transition, there are shape-memory properties；
(2) modified gutta-percha is prepared into diameter is 15mm, and modified gutta-percha test specimen is placed in by the cylinder test specimen of a height of 40mm
Universal testing machine is compressed, and setting environment the temperature inside the box is consistent with bituminous pavement use temperature range；
(3) it after test specimen heat preservation 15min, is compressed with 0.1mm/min loading speed, height of specimen is observed, when test specimen is compressed
To when certain prestrain, stop load, maintain temperature and load 30min, stop heating, make test specimen at this moment under load action from
It is so cooled to room temperature, height of specimen is measured, is recorded as l1；
(4) removal load, after test specimen being placed at room temperature on experimental bench for 24 hours, measurement height of specimen is l2；
(5) test specimen is put into bituminous pavement using 1h is kept the temperature in the consistent environmental cabinet of temperature, makes the abundant recovery of shape of test specimen, adopts
It is observed with optical microscopy and replys situation, height of specimen is l after measurement is replied3；
(6) the shape fixed rate and shape recovery rate for calculating modified gutta-percha evaluate its shape-memory properties, wherein use (40-
l2)/(40-l1) shape fixed rate is calculated, using (l3-l2)/(40-l2) shape recovery rate is calculated, and on this basis, further
Optimize modified Cortex Eucommiae glue formula.
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| CN201910756242.6A CN110346549A (en) | 2019-08-14 | 2019-08-14 | A kind of evaluation method of modified gutta-percha shape-memory properties |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537554A (en) * | 2020-04-07 | 2020-08-14 | 江苏大学 | Device and method for testing shape memory performance of composite electric response high polymer material based on folding and unfolding method |
| CN112284904A (en) * | 2020-11-06 | 2021-01-29 | 青岛科技大学 | Characterization method of shape memory behavior of thermoplastic vulcanized rubber in compression mode |
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Application publication date: 20191018 |