CN109384927A - Application of the silicone elastomer based on aromatic radical cystine linkage and imine linkage as self-healing material - Google Patents
Application of the silicone elastomer based on aromatic radical cystine linkage and imine linkage as self-healing material Download PDFInfo
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- CN109384927A CN109384927A CN201710671693.0A CN201710671693A CN109384927A CN 109384927 A CN109384927 A CN 109384927A CN 201710671693 A CN201710671693 A CN 201710671693A CN 109384927 A CN109384927 A CN 109384927A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/392—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing sulfur
Abstract
The present invention discloses application of the silicone elastomer based on aromatic radical cystine linkage and imine linkage as self-healing material, by 1,3,5- mesitylene formaldehyde, polysiloxanes, diamino diphenyl disulfide are under the action of catalyst, directly it is crosslinked by the condensation reaction of aldehyde radical and amino, reaction system excludes oxygen, and two kinds of dynamic covalent bonds of aromatic radical cystine linkage and imine linkage are introduced into polysiloxanes simultaneously.The present invention prepares the silicone elastomer with excellent self-healing performance, high elongation at tear, the self-heal under room temperature/cryogenic conditions, required condition is milder, healing rate is fast, effect is good, and preparation method is simple, is easy to control, raw material is the commodity for having been commercialized production, cheap and easily-available.
Description
Technical field
The invention belongs to silicone elastomer and its preparation fields, double based on aromatic radical more specifically to one kind
Sulfide linkage and the silicone elastomer of imine linkage and its preparation method and application.
Background technique
Silicone elastomer has non-toxic and tasteless, height insulation as one of most important extraordinary synthesis macromolecule, resistance to
Heat, many excellent properties such as cold-resistant, thus in the various high-technology fields such as national defence, military project, Aeronautics and Astronautics with irreplaceable
Application value, and have become the research hotspot of researcher.Silicone elastomer in the long-term use process, leads to
Often need to bear the various extreme operating conditions such as high temperature, low temperature, burn into irradiation, alternating load, inside inevitably part
Damage and micro-crack.These micro-cracks are hidden in material internal deeply, and in practical application, it is limited to manpower and material resources and economic cost,
It is difficult to carry out comprehensive detection in time using conventional means and repair, thus accumulate over a long period and cause the mechanics of materials and heat, electricity, sound etc.
The deterioration of performance.Since polysiloxanes is widely used in the new and high technologies such as defence and military, aerospace neck frequently as critical component
Domain, material failure caused by micro-crack is accumulated easily cause irremediable major accident.Therefore, development has to local damage
The silicone elastomer of wound and micro-crack with real-time self-repair function is with great practical application value.
Since the eighties in last century, US military was put forward for the first time self-healing concept, the preparation of self-healing material increasingly by
To everybody extensive concern.By assigning material self-healing performance, can reach prevents material damage, expands the use scope of material
With the effect to prolong the service life.Selfreparing can be divided into the selfreparing of foreign aid's type and Intrinsical selfreparing.The former needs in advance to
Consolidant embeds in the material, and crack extension force when by damage releases consolidant and viscous benefit crackle, maximum disadvantage
It is that can only realize primary reparation, and the application in terms of film or coating is restricted.And the latter is that have by material internal
Reversible reaction molecular structure realize selfreparing.Compared to foreign aid's type selfreparing, advantage clearly, without the concern for additional
The compatibility of substance and matrix, rely solely on self-characteristic can on a molecular scale repeatedly, repeatedly repair defect.It is common
Reversible dynamic key include Diels-Alder key, cystine linkage, imine linkage, hydrogen bond, metal coordinate bond, ionic bond etc..At present few
In research in terms of several polysiloxanes self-repair materials, the realization of selfreparing still requires greatly extraneous light, heat or solvent
Stimulation, such as ultraviolet light, high temperature etc., condition is harsh and is not easy to implement.By introducing aromatic radical cystine linkage and two kinds of imine linkage
Dynamic covalent bond has not been reported to prepare self-healing silicone elastomer.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the poly- silicon based on aromatic radical cystine linkage and imine linkage
Oxygen alkane elastomer and its preparation method and application, the method for producing elastomers is simple, and raw material is easy to get, material property controllability
By force, self-healing can be carried out under mild condition (room temperature/low temperature), and there is high elongation at tear, as a kind of novel bullet
Property body, has very wide application prospect.
Technical purpose of the invention is achieved by following technical proposals:
Silicone elastomer and preparation method thereof based on aromatic radical cystine linkage and imine linkage, with 1,3,5- mesitylene first
Aldehyde, polysiloxanes and diamino diphenyl disulfide are reacted under catalyst action and oxygen free condition, so that aromatic radical cystine linkage
It is introduced into polysiloxanes and (is crosslinked by the condensation reaction of aldehyde radical and amino) simultaneously with two kinds of dynamic covalent bonds of imine linkage, have
For body:
Diamino diphenyl disulfide is 4,4'- diamino diphenyl disulfide or 2,2'- diamino diphenyl disulfide.
Polysiloxanes is amino-terminated polysiloxanes, and side chain is methyl, vinyl, phenyl or fluorohydrocarbon base；Poly- silicon oxygen
The equal relative molecular weight of the number of alkane be 900-100000, preferably 2000-50000, more preferred 5000-20000.
Oxygen free condition is provided for reaction system using inert protective gas, such as nitrogen, helium or argon gas.
Catalyst is fluoroform sulphonate, such as trifluoromethanesulfonic acid zinc, trifluoromethanesulfonic acid europium, trifluoromethanesulfonic acid yttrium, trifluoro
Methanesulfonic acid scandium or Ytterbiumtriflate.
Amino is provided by polysiloxanes and/or diamino diphenyl disulfide in the reaction, 1,3,5- mesitylene formaldehyde provides aldehyde
Base；The molar ratio of polysiloxanes and diamino diphenyl disulfide is (0.1-3)-(3-0.1), and preferably the two is equimolar ratio；Aldehyde
The molar ratio of base and amino is (1-3): 1, preferably (1-2): 1；Catalyst amount is 0.001-the 0.02 of amino molal quantity,
It is preferred that 0.01-0.02.
In specific implementation, it carries out as steps described below:
Step 1, polysiloxanes, diamino diphenyl disulfide is evenly dispersed in a solvent, form the first mixed solution；By 1,
3,5- mesitylene formaldehyde, catalyst are evenly dispersed in a solvent, form the second mixed solution；
Step 2, the first mixed solution is added in the second mixed solution, the item in inert protective gas atmosphere and persistently stirred
It is reacted, is crosslinked by the condensation reaction of aldehyde radical and amino so that aromatic radical cystine linkage and two kinds of dynamics of imine linkage are covalent under part
Key is introduced into polysiloxanes simultaneously；
Step 3, after step 2 reaction, the reaction solution of step 2 is placed in mold and carries out solvent volatilization and drying.
In the above-mentioned technical solutions, solvent is anhydrous solvent, selective volatilization organic solvent, such as methylene chloride, three chloromethanes
Alkane, ethyl alcohol, acetone, ethyl acetate, tetrahydrofuran or toluene.
In the above-mentioned technical solutions, provide oxygen free condition using inert protective gas for reaction system, as nitrogen, helium or
Person's argon gas.
In the above-mentioned technical solutions, in step 2, reaction time at least 0.1 hour, temperature are that room temperature 20-25 is Celsius
Degree or 30-60 degrees Celsius, mixing speed be 100-300 turns per minute, preferred reaction time be 0.1-24 hours, more
It is preferred that 2-15 hours.
In the above-mentioned technical solutions, in step 3, reaction solution is poured into the mold of tetrafluoroethene, mold is placed in logical
Solvent flashing 6-12 hours in wind cupboard, and drying 12-for 24 hours, is obtained based on the double sulphur of aromatic radical in 40-80 DEG C of vacuum drying ovens
The silicone elastomer of key and imine linkage.
Silicone elastomer based on aromatic radical cystine linkage and imine linkage as the application that can be reprocessed with degradable material,
It is formed in hot press, hot pressing condition is 60-80 DEG C of temperature, pressure 1-10MPa, time 10-30min；Averagely 4-
Realize that polysiloxanes is degraded in trifluoroacetic acid in 5min.
Application of the silicone elastomer based on aromatic radical cystine linkage and imine linkage as self-healing material, at room temperature
Self-healing occurs, self-healing 4h mechanical property is restored to reset condition, while at -20 DEG C, extends repair time to 72h, power
Performance recovery is learned to reset condition.
Product prepared by the present invention is characterized using infrared spectroscopy, as shown in Fig. 1,1673cm in spectrogram-1Place
Absorption peak represents the stretching vibration of C=N key, this demonstrate that containing imine linkage in sample really.Since cystine linkage is present in reaction
In object and it is not involved in reaction, therefore also certainly exists cystine linkage in product.1409cm-1、1257cm-1And 781cm-1The absorption peak at place
It is the bending vibration and stretching vibration of Si-C key respectively, this is caused by the methyl in raw material polydimethylsiloxanebackbone backbone.
1018cm-1The absorption peak at place indicates the stretching vibration of polysiloxanes Si-O-Si main chain backbone, this is all silicone materials institutes
Shared.Consulting literatures learn that the characteristic peak of aldehyde radical C=O stretching vibration should come across 1710cm-1Near；The flexible vibration of amino N-H
It is dynamic to come across 3500~3300cm-1, N-H bending vibration should come across 1650~1500cm-1；And infrared spectrum is in upper rheme
It sets all without absorption peak, therefore judges that there is no aldehyde radical and amino in product.In conclusion can tentatively judge that imine linkage is successfully given birth to
At cystine linkage is present in product polysiloxanes；There is no amino and aldehyde radical in product, it was demonstrated that reaction is more complete.
Compared with prior art, self-healing, self-healing can occur at room temperature for the silicone elastomer prepared by the present invention
It closes 4h mechanical property and is restored to reset condition, while at -20 DEG C, extend repair time to 72h, mechanical property is restored to original
State；Silicone elastomer elongation at break prepared by the present invention is up to 600-700% simultaneously.Original used in the present invention
Material is easy to get, and is all the commodity of commercialization, and synthesis process is not necessarily to specific condition and equipment, and synthesis technology is simple, and cost is relatively low, has
Significant application prospect.
Detailed description of the invention
Fig. 1 is the infrared spectrum of silicone elastomer prepared by the present invention.
Fig. 2 is the stress-strain diagram of 20 DEG C of selfreparings of silicone elastomer room temperature prepared by the embodiment of the present invention 1.
Fig. 3 is the stress-strain diagram of -20 DEG C of selfreparings of silicone elastomer prepared by the embodiment of the present invention 1.
Fig. 4 is the schematic picture that the present invention carries out silicone elastomer hot pressing processing.
Fig. 5 is the schematic picture that the present invention carries out silicone elastomer degradation experiment.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below.
Embodiment 1:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.248g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.015g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
Embodiment 2:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.062g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.081g, 3,5- mesitylene first, 0.011g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
Embodiment 3:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.248g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid europium aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.025g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2) with the solution in needle tubing extraction step (1), reacts 1h at room temperature, it will be anti-
It answers liquid to pour into the mold of tetrafluoroethene, mold is placed in solvent flashing in draught cupboard and is stayed overnight, and done in 60 DEG C of vacuum drying ovens
It is dry for 24 hours.
Embodiment 4:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.124g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.007g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
Embodiment 5:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.248g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride/chloroform mixed solvent, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.015g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride/chloroform mixed solvent, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
Embodiment 6:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
2, the 2'- diamino diphenyl disulfide of dimethyl silicone polymer and 0.248g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.015g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
Comparative example 1:
(1) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.By 5g's
4, the 4'- diaminodiphenylmethane of dimethyl silicone polymer and 0.198g are placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 20mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(2) 50mL reaction flask is vacuumized, be evacuated-gas replenishment process three times, with the oxygen in exclusion system.It will
The trifluoromethanesulfonic acid zinc aldehyde of the 1 of 0.162g, 3,5- mesitylene first, 0.022g is placed in a reaction flask, then inflation/deflation is primary.Injection adds
Enter 10mL anhydrous methylene chloride, is sufficiently stirred and makes it completely dissolved.
(3) it is added in the solution of step (2), is reacted at room temperature for 24 hours with the solution in needle tubing extraction step (1), it will
Reaction solution pours into the mold of tetrafluoroethene, and mold is placed in solvent flashing in draught cupboard and is stayed overnight, and in 60 DEG C of vacuum drying ovens
Drying is for 24 hours.
It is tested using sample prepared by embodiment, the CMT4203 type using Mei Tesi industrial system Co., Ltd is micro-
Machine controls electronic universal cupping machine and carries out extension test, and the strip that silicone elastomer is cut into 20 × 2 × 1mm is tried
Sample, with 50mmmin-1Rate tensile until fracture, obtain the load-deformation curve of sample.Silicone elastomer is cut out
At the bar-shaped sample of 20 × 2 × 1mm, with pocket knife in sample midsection, section is posted with tweezers along original sample then, is placed in room
It is placed the corresponding time under 20 degrees Celsius of temperature or low temperature (subzero 20 degrees Celsius), and carries out extension test, as shown in the picture,
Self-healing occurs at room temperature, self-healing 4h mechanical property is restored to reset condition, while at -20 DEG C, and extension repair time arrives
72h, mechanical property are restored to reset condition；Silicone elastomer elongation at break prepared by the present invention is up to 600- simultaneously
700%.
The sample progress of preparation of the embodiment of the present invention is hot-forming, it is placed in hot press and is formed, hot pressing condition is
60-80 DEG C of temperature, pressure 1-10MPa, time 10-30min can be realized hot-forming.Then by hot-forming product into
Row destroys, then carries out hot pressing with identical parameters, can equally form, and as shown in Fig. 4, left side is the product after destroying, right side
For product hot-forming again.
Using silicone elastomer prepared by the present invention as sample, it is placed in the vial for fill trifluoroacetic acid 1-5
The variation of observation sample is photographed to record in minute, and degradation averagely can be realized in 4-5min, and (i.e. polysiloxanes dissolution is dispersed in
In trifluoroacetic acid).
Content carries out the adjustment of preparation technology parameter according to the present invention, and the preparation of silicone elastomer can be achieved, and
Show the performance almost the same with above-described embodiment.Illustrative description has been done to the present invention above, it should explanation,
In the case where not departing from core of the invention, any simple deformation, modification or other skilled in the art can not be spent
The equivalent replacement of expense creative work each falls within protection scope of the present invention.
Claims (6)
1. application of the silicone elastomer based on aromatic radical cystine linkage and imine linkage as self-healing material, feature exist
In, self-healing occurs at room temperature, self-healing 4h mechanical property is restored to reset condition, while at -20 DEG C, extend repair when
Between arrive 72h, mechanical property is restored to reset condition；Silicone elastomer based on aromatic radical cystine linkage and imine linkage, with 1,
3,5- mesitylene formaldehyde, polysiloxanes and diamino diphenyl disulfide are reacted under catalyst action and oxygen free condition, are passed through
The condensation reaction crosslinking of aldehyde radical and amino is so that two kinds of dynamic covalent bonds of aromatic radical cystine linkage and imine linkage are introduced into poly- silicon simultaneously
In oxygen alkane, amino is provided by polysiloxanes and/or diamino diphenyl disulfide, 1,3,5- mesitylene formaldehyde provides aldehyde radical；Poly- silicon oxygen
The molar ratio of alkane and diamino diphenyl disulfide is (0.1-3)-(3-0.1), and the molar ratio of aldehyde radical and amino is (1-3): 1,
Catalyst amount is 0.001-the 0.02 of amino molal quantity；Catalyst is fluoroform sulphonate.
2. the silicone elastomer according to claim 1 based on aromatic radical cystine linkage and imine linkage is as self-healing material
The application of material, which is characterized in that the molar ratio of polysiloxanes and diamino diphenyl disulfide is equimolar ratio；Aldehyde radical and amino rub
You are than being (1-2): 1；Catalyst amount is 0.01-the 0.02 of amino molal quantity.
3. the silicone elastomer according to claim 1 based on aromatic radical cystine linkage and imine linkage is as self-healing material
The application of material, which is characterized in that diamino diphenyl disulfide is 4,4'- diamino diphenyl disulfide or 2,2'- diamino diphenyl disulfide.
4. the silicone elastomer according to claim 1 based on aromatic radical cystine linkage and imine linkage is as self-healing material
The application of material, which is characterized in that polysiloxanes is amino-terminated polysiloxanes, and side chain is methyl, vinyl, phenyl or fluorine
Alkyl；The equal relative molecular weight of the number of polysiloxanes be 900-100000, preferably 2000-50000, more preferred 5000-
20000。
5. the silicone elastomer according to claim 1 based on aromatic radical cystine linkage and imine linkage is as self-healing material
The application of material, which is characterized in that catalyst is trifluoromethanesulfonic acid zinc, trifluoromethanesulfonic acid europium, trifluoromethanesulfonic acid yttrium, trifluoromethanesulfonic acid
Scandium or Ytterbiumtriflate.
6. the silicone elastomer according to claim 1 based on aromatic radical cystine linkage and imine linkage is as self-healing material
The application of material, which is characterized in that oxygen free condition is provided using inert protective gas for reaction system, such as nitrogen, helium or argon
Gas.
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| CN201710671693.0A CN109384927B (en) | 2017-08-08 | 2017-08-08 | Use of polysiloxane elastomers as self-healing materials based on aryl disulfide and imine bonds |
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| CN201710671693.0A CN109384927B (en) | 2017-08-08 | 2017-08-08 | Use of polysiloxane elastomers as self-healing materials based on aryl disulfide and imine bonds |
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| WO2021033140A1 (en) * | 2019-08-19 | 2021-02-25 | Sabic Global Technologies B.V. | Polyolefin-based vitrimer materials containing disulfide units |
| CN112175399A (en) * | 2020-10-28 | 2021-01-05 | 青岛科技大学 | Flexible repairable conductive organic silicon composite material, preparation method thereof and application of strain sensor |
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| CN109384927B (en) | 2021-03-23 |
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