CN114371122A - Method for improving interface bonding performance of IPDI (isophorone diisocyanate) type butylated hydroxytoluene propellant and lining - Google Patents
Method for improving interface bonding performance of IPDI (isophorone diisocyanate) type butylated hydroxytoluene propellant and lining Download PDFInfo
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- CN114371122A CN114371122A CN202111518023.8A CN202111518023A CN114371122A CN 114371122 A CN114371122 A CN 114371122A CN 202111518023 A CN202111518023 A CN 202111518023A CN 114371122 A CN114371122 A CN 114371122A
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- 239000005058 Isophorone diisocyanate Substances 0.000 title claims abstract description 112
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000003380 propellant Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000004322 Butylated hydroxytoluene Substances 0.000 title description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 title description 2
- 229940095259 butylated hydroxytoluene Drugs 0.000 title description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 title description 2
- 239000000243 solution Substances 0.000 claims abstract description 51
- 239000004014 plasticizer Substances 0.000 claims abstract description 22
- -1 hydroxyl butyl Chemical group 0.000 claims abstract description 13
- 239000012895 dilution Substances 0.000 claims abstract description 11
- 238000010790 dilution Methods 0.000 claims abstract description 11
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 claims abstract description 8
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZWYAVGUHWPLBGT-UHFFFAOYSA-N bis(6-methylheptyl) decanedioate Chemical compound CC(C)CCCCCOC(=O)CCCCCCCCC(=O)OCCCCCC(C)C ZWYAVGUHWPLBGT-UHFFFAOYSA-N 0.000 claims abstract description 7
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims abstract description 4
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 238000005491 wire drawing Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 17
- 238000007585 pull-off test Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 11
- 239000003085 diluting agent Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 9
- 239000013022 formulation composition Substances 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 229920002121 Hydroxyl-terminated polybutadiene Polymers 0.000 description 7
- AVUYXHYHTTVPRX-UHFFFAOYSA-N Tris(2-methyl-1-aziridinyl)phosphine oxide Chemical compound CC1CN1P(=O)(N1C(C1)C)N1C(C)C1 AVUYXHYHTTVPRX-UHFFFAOYSA-N 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/32—Constructional parts; Details not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Polyurethanes Or Polyureas (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a method for improving the interface bonding performance of IPDI (isophorone diisocyanate) type hydroxyl-terminated propellant and a lining. The plasticizer is one or a combination of several of diisooctyl sebacate, dioctyl adipate, dioctyl phthalate and tributyl acetylcitrate. The mass fraction of IPDI in the IPDI solution after the plasticizer dilution is 30-70%, and the balance is the plasticizer; the content of IPDI is adjusted according to the temperature and humidity of the environment, and when the environment is increased, the proportion of IPDI is increased. The prepared plasticizer/IPDI solution is evenly sprayed on a semi-solidified lining layer, and then casting and vulcanization are carried out according to the traditional mode. The IPDI type hydroxyl butyl liner/propellant interface bonding performance is obviously improved on the basis of not changing the original liner and propellant formulas.
Description
Technical Field
The invention belongs to the technical field of bonding of liners of solid rocket engines, relates to bonding of IPDI (isophorone diisocyanate) type hydroxyl butyl propellant and a liner, and particularly relates to a method for improving the bonding performance of an IPDI type hydroxyl butyl propellant and the interface of the liner, wherein spray surface treatment and/or plasma treatment can be adopted.
Background
The reliability of the bond at the solid propellant charge interface is critical to the proper operation of the engine. 1/3 of the solid rocket motors that failed the foreign tests were reported to be caused by interfacial debonding, which is again the most dominant failure mode for propellant/liner interfacial debonding. The propellant with IPDI as curing agent has the advantages of long applicable period, excellent mechanical property, good storage property, low toxicity and the like, is a curing agent widely applied in the world at present, but is applied to rocket engines due to the characteristic of slow curing rate, the problems of weak adhesion, debonding and the like of the propellant interface are easy to generate, and the adverse effect is brought to the working stability and the structural integrity of the engines.
The research finds that the main reasons for causing the weak adhesion and the debonding of the IPDI propellant interface include two aspects, on one hand, the moisture consumes the curing agent in the interfacial adhesion system, so that the content of the curing agent is lower than the stoichiometric value. On the other hand, the concentration of the free curing agent in the semi-cured lining layer is lower than that of the propellant, and the IPDI curing rate is slow, so that a long-time concentration difference exists at the bonding interface, and part of IPDI migrates. The dual factors contribute to poor strength at the propellant interface. The schematic diagram of IPDI migration after the propellant and the semi-cured lining layer are matched is shown in FIG. 1.
At present, means for ensuring the interface bonding performance by controlling the temperature and the humidity of the environment exist, but the control cost of the means is high, and the performance is improved slightly under the conditions that the environment humidity is high and is difficult to control.
Disclosure of Invention
The invention provides a method for improving the bonding performance of an IPDI (isophorone diisocyanate) type hydroxyl-terminated propellant and a lining interface, which can effectively improve the bonding performance of the IPDI type propellant/lining interface on the basis of not adjusting the formulas of the propellant and the lining and not influencing the use performance of the propellant and the lining. In particular, a spray surface treatment and/or a plasma treatment may be used.
The technical scheme of the invention is that the method for improving the bonding performance of the IPDI type hydroxyl propellant and the lining interface comprises the steps of spraying IPDI solution diluted by adopting a plasticizer on the surface of the lining in a semi-cured state, and then pouring the hydroxyl propellant taking IPDI as a curing agent and curing.
Further, the plasticizer is one or a combination of several of diisooctyl sebacate, dioctyl adipate, dioctyl phthalate and tributyl acetylcitrate.
Further, the mass fraction of IPDI in the IPDI solution after the plasticizer dilution is 30% -70%, and the rest is the plasticizer.
Further, the content of IPDI in the IPDI solution is adjusted according to the temperature and humidity of the environment, and when the environment is increased, the proportion of IPDI is increased.
Further, the amount ratio of plasticizer to IPDI was 1:1 at an absolute ambient moisture content of 9.23g/kg dry air.
Further, the plasticizer-diluted IPDI solution was sprayed in an amount of 32g/m2～54g/m2。
Furthermore, in the lining layer using IPDI as curing agent, the weight portions are 100 portions of binder, 14 to 17 portions of IPDI, 0.5 to 2.5 portions of curing catalyst, 12 to 20 portions of filler and 0.1 to 0.6 portion of functional assistant.
Further, the semi-curing degree of the lining layer is determined qualitatively according to the touch feeling and the hand sticking without wire drawing.
Furthermore, in the hydroxyl-terminated propellant taking IPDI as a curing agent, the total amount of the oxidant, the explosive and the metal fuel is 87-89 parts by weight, the usage amount of the hydroxyl-terminated binder, the IPDI and the plasticizer is 10.5-12 parts by weight, and the auxiliary agent is 0.1-0.5 part by weight.
The invention also relates to application of the IPDI solution diluted by the plasticizer in improving the bonding performance of the IPDI type hydroxyl-terminated propellant and the lining interface.
The invention has the following beneficial effects:
1. the invention provides a treatment method after semi-curing of a lining layer, which is characterized in that a prepared plasticizer/IPDI diluent is sprayed on the surface of the semi-cured lining layer, so that IPDI consumed by water at an interface is supplemented, and the interface performance is improved. On the other hand, IPDI molecules in the propellant can be reduced to migrate into the lining layer, so that the propellant and the lining layer can react according to set metering parameters. Compared with the traditional means, the method has the advantages of more direct interface performance adjustment, low requirement on environment temperature and humidity and more obvious interface performance improvement.
2. The invention evenly sprays the prepared plasticizer/IPDI solution on the semi-solidified lining layer, and then pours the hydroxyl propellant with IPDI as the curing agent and cures. The IPDI type hydroxyl butyl liner/propellant interface bonding performance is obviously improved on the basis of not changing the original liner and propellant formulas.
Drawings
FIG. 1 is a schematic diagram of IPDI migration after the mold assembly of a propellant and a semi-cured lining layer in the background art.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
The invention provides a method for improving the interface bonding performance of an IPDI (isophorone diisocyanate) type hydroxyl-butyl propellant and a lining layer.
Example 1
According to QJ 2038.1A-2004 method for testing interfacial adhesion strength of combustion chamber of solid rocket engine, part 1: according to the stipulation of the rectangular test piece pull-apart method, the same batch of heat insulating layer, lining and propellant is adopted to prepare a propellant/lining/heat insulating layer/metal bonding test piece (the proportion of the lining and the propellant is shown in tables 1 and 2), and the interface bonding strength is tested when the tensile rate is 20mm/min at normal temperature.
TABLE 1 formulation composition of the underlayers
Note: phr represents the amount of liner components per 100 parts of gum;
TABLE 2 propellant formulation composition
| Components | AP | RDX | Al | HTPB | IPDI | DOS | MAPO |
| Ratio/% of | 68.5 | 10 | 10 | 6.934 | 0.586 | 3.78 | 0.2 |
1) Preparation of dilution liquid
Adding 6g of isophorone diisocyanate and 14g of diisooctyl sebacate into a mixing container, and uniformly stirring to prepare a solution with IPDI concentration of 30%, wherein the solution is marked as 001 solution.
Adding 10g of isophorone diisocyanate and 10g of diisooctyl sebacate into a mixing container, and uniformly stirring to prepare a solution with 50% IPDI concentration, wherein the label is 002 solution.
Adding 14g of isophorone diisocyanate and 6g of diisooctyl sebacate into a mixing container, and uniformly stirring to prepare a solution with IPDI concentration of 70%, wherein the solution is marked as a 003 solution.
2) Combined tear-off test piece preparation
In an environment with absolute humidity of 9.23g/kg dry air, the lining prepared in the above table 1 is uniformly coated on the surface of the thermal insulation layer of the pull-off test piece, IPDI diluent is sprayed on the surface after the lining is semi-cured, the propellant prepared according to the table 2 is poured to prepare the hydroxyl-terminated propellant/lining/thermal insulation layer combined pull-off test piece, and the hydroxyl-terminated propellant/lining/thermal insulation layer combined pull-off test piece is cured in a curing furnace at the temperature of 60 ℃ for 7 days, wherein each property is shown in the following table 3.
TABLE 3 impact of spray IPDI dilution on interface Performance
Table 3 shows that the interface strength of the sprayed 002 diluted solution is highest in an environment with an absolute humidity of 9.23g/kg dry air, and is improved by 0.415MPa compared with the strength of the non-sprayed diluted solution.
Example 2
According to QJ 2038.1A-2004 method for testing interfacial adhesion strength of combustion chamber of solid rocket engine, part 1: according to the stipulation of the rectangular test piece pull-apart method, the same batch of heat insulating layer, lining and propellant is adopted to prepare a propellant/lining/heat insulating layer/metal bonding test piece (the proportion of the lining and the propellant is shown in tables 4 and 5), and the interface bonding strength is tested when the tensile rate is 20mm/min at normal temperature.
TABLE 4 underlayer formulation composition
| Components | HTPB | IPDI | TPB | SiO2 | MAPO |
| Ratio/(phr) | 100 | 16.23 | 0.45 | 20 | 0.1 |
Note: phr represents the amount of liner components per 100 parts of gum;
TABLE 5 propellant formulation composition
| Components | AP | RDX | Al | HTPB | IPDI | DOS | MAPO |
| Ratio/% of | 60.5 | 10 | 18 | 6.917 | 0.603 | 3.78 | 0.2 |
1) Preparation of dilution liquid
20g of dioctyl adipate are marked as 004 solution
8g of isophorone diisocyanate and 12g of dioctyl adipate are added into a mixing container and stirred uniformly to prepare a solution with IPDI concentration of 40%, and the solution is marked as 005 solution.
11g of isophorone diisocyanate and 9g of dioctyl adipate were added to a mixing vessel and stirred uniformly to prepare a 55% IPDI solution, denoted as 006 solution.
14g of isophorone diisocyanate and 6g of dioctyl adipate were added to a mixing vessel and stirred uniformly to prepare a solution of IPDI 70%, denoted as 007 solution.
20g of isophorone diisocyanate are marked as 008 solution
2) Combined tear-off test piece preparation
In an environment with an absolute humidity of 12.16g/kg dry air, the lining prepared in the above table 4 is uniformly coated on the surface of the thermal insulation layer of the pull-off test piece, IPDI diluent is sprayed on the surface after the lining is semi-cured, the propellant prepared according to the table 5 is poured to prepare the hydroxyl-terminated propellant/lining/thermal insulation layer combined pull-off test piece, the pull-off test piece is cured in a curing furnace at the temperature of 60 ℃ for 7 days, and various properties are shown in the following table 6.
TABLE 6 impact of spray IPDI dilution on interface Performance
Table 6 shows that the sprayed 008 solution (IPDI curing agent) has the highest interfacial strength in an environment with an absolute humidity of 12.16g/kg dry air, but the total sprayed IPDI curing agent risks causing the propellant interface to become hard and brittle, which has an effect on the interfacial peel performance. The spraying 007 diluent has higher interface performance and the strength is improved by 0.447MPa compared with that of the non-spraying diluent. Spraying 004 solution (plasticizer) reduces the interfacial bond strength.
Example 3
According to QJ 2038.1A-2004 method for testing interfacial adhesion strength of combustion chamber of solid rocket engine, part 1: according to the stipulation of the rectangular test piece pull-apart method, the same batch of heat insulating layer, lining and propellant is adopted to prepare a propellant/lining/heat insulating layer/metal bonding test piece (the proportion of the lining and the propellant is shown in tables 7 and 8), and the interface bonding strength is tested when the tensile rate is 20mm/min at normal temperature.
TABLE 7 underlayer formulation composition
| Components | HTPB | IPDI | TPB | SiO2 | MAPO |
| Ratio/(phr) | 100 | 14.23 | 0.45 | 20 | 0.1 |
Note: phr represents the amount of liner components per 100 parts of gum;
TABLE 8 propellant formulation composition
| Components | AP | RDX | Al | HTPB | IPDI | DOS | MAPO |
| Ratio/% of | 60.5 | 10 | 18 | 6.956 | 0.564 | 3.78 | 0.2 |
1) Preparation of dilution liquid
3g of isophorone diisocyanate and 12g of acetyl tributyl citrate are added into a mixing container and stirred uniformly to prepare a solution with IPDI concentration of 20%, and the solution is marked as 009 solution.
Adding 8g of isophorone diisocyanate and 12g of acetyl tributyl citrate into a mixing container, and uniformly stirring to prepare a solution with IPDI concentration of 40%, wherein the solution is marked as 010 solution.
Adding 12g of isophorone diisocyanate and 8g of acetyl tributyl citrate into a mixing container, and uniformly stirring to prepare a solution with IPDI concentration of 60%, wherein the solution is marked as 011 solution.
2) Combined tear-off test piece preparation
In an environment with absolute humidity of 7.46g/kg dry air, the lining prepared in the above table 7 is uniformly coated on the surface of the thermal insulation layer of the pull-off test piece, IPDI diluent is sprayed on the surface after the lining is semi-cured, the propellant prepared according to the table 8 is poured to prepare the hydroxyl butyl propellant/lining/thermal insulation layer combined pull-off test piece, the pull-off test piece is cured in a curing furnace at the temperature of 60 ℃ for 7 days, and various properties are shown in the following table 9.
TABLE 9 impact of spray IPDI dilution on interface Performance
Table 9 shows that the sprayed 010 solution has the highest interfacial strength in an environment with an absolute humidity of 7.46g/kg dry air, which is about 0.361MPa higher than that of the non-sprayed diluent.
Example 4
According to QJ 2038.1A-2004 method for testing interfacial adhesion strength of combustion chamber of solid rocket engine, part 1: according to the stipulation of the rectangular test piece pull-apart method, the same batch of heat insulating layer, lining and propellant is adopted to prepare a propellant/lining/heat insulating layer/metal bonding test piece (the proportion of the lining and the propellant is shown in tables 10 and 11), and the interface bonding strength is tested when the tensile rate is 20mm/min at normal temperature.
TABLE 10 formulation composition of the underlayer
| Components | HTPB | IPDI | TPB | SiO2 | MAPO |
| Ratio/(phr) | 100 | 15.62 | 0.45 | 20 | 0.1 |
Note: phr represents the amount of liner components per 100 parts of gum;
TABLE 11 propellant formulation compositions
| Components | AP | RDX | Al | HTPB | IPDI | DOS | MAPO |
| Ratio/% of | 60.5 | 10 | 18 | 6.941 | 0.579 | 3.78 | 0.2 |
1) Preparation of dilution liquid
Adding 8g of isophorone diisocyanate, 6g of acetyl tributyl citrate and 6g of diisooctyl sebacate into a mixing container, and uniformly stirring to prepare a solution with IPDI concentration of 40%, wherein the solution is marked as 012 solution.
8g of isophorone diisocyanate, 6g of dioctyl adipate and 6g of dioctyl phthalate are added into a mixing container and stirred uniformly to prepare a solution with 40% IPDI concentration, and the solution is marked as 013 solution.
2) Combined tear-off test piece preparation
In an environment with absolute humidity of 7.46g/kg dry air, the lining prepared in the above table 7 is uniformly coated on the surface of the thermal insulation layer of the pull-off test piece, IPDI diluent is sprayed on the surface after the lining is semi-cured, the propellant prepared according to the table 8 is poured to prepare the hydroxyl butyl propellant/lining/thermal insulation layer combined pull-off test piece, the pull-off test piece is cured in a curing furnace at the temperature of 60 ℃ for 7 days, and various properties are shown in the following table 9.
TABLE 9 impact of spray IPDI dilution on interface Performance
Table 9 shows that the spray coating 012, 013 solutions have comparable tear strengths from the specimen interface in an environment with an absolute humidity of 8.62g/kg dry air, about 0.35MPa higher than the strength of the non-spray coating diluent.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (10)
1. A method for improving the bonding performance of an IPDI (isophorone diisocyanate) type hydroxyl propellant and a lining interface is characterized in that an IPDI solution diluted by a plasticizer is sprayed on the surface of the lining reaching a semi-cured state, and then the hydroxyl propellant with IPDI as a curing agent is poured and cured.
2. The method of claim 1 for improving the interfacial adhesion of an IPDI type hydroxyl butyl propellant and a liner, wherein the method comprises the following steps: the plasticizer is one or a combination of more of diisooctyl sebacate, dioctyl adipate, dioctyl phthalate and acetyl tributyl citrate.
3. The method of claim 1 for improving the interfacial adhesion of an IPDI type hydroxyl butyl propellant and a liner, wherein the method comprises the following steps: the mass fraction of IPDI in the IPDI solution after the plasticizer dilution is 30% -70%, and the balance is the plasticizer.
4. The method of claim 3 for improving the interfacial adhesion of IPDI-type hydroxyl butyl propellant and liner, wherein the method comprises the following steps: the content of IPDI in the IPDI solution is adjusted according to the temperature and humidity of the environment, and when the environment is increased, the proportion of IPDI is increased.
5. The method of claim 1 for improving the interfacial adhesion of an IPDI type hydroxyl butyl propellant and a liner, wherein the method comprises the following steps: the ratio of plasticizer to IPDI used was 1:1 at an absolute ambient moisture content of 9.23g/kg dry air.
6. The method for improving the interfacial adhesion performance of the IPDI type hydroxyl butyl propellant and the lining layer according to any one of claims 1 to 5, wherein the method comprises the following steps: the spraying amount of the IPDI solution diluted by the plasticizer is 32g/m2~54g/m2。
7. The method for improving the interfacial adhesion performance of the IPDI type hydroxyl terminated propellant and the liner according to claim 1, wherein the liner using IPDI as the curing agent comprises 100 parts by weight of binder, 14 to 17 parts by weight of IPDI, 0.5 to 2.5 parts by weight of curing catalyst, 12 to 20 parts by weight of filler and 0.1 to 0.6 part by weight of functional assistant.
8. The method of claim 1 for improving the interfacial adhesion of an IPDI type hydroxyl butyl propellant and a liner, wherein the method comprises the following steps: the semi-curing degree of the lining layer is determined qualitatively according to the touch feeling and no wire drawing caused by hand sticking.
9. The method for improving the interfacial adhesion performance of the IPDI type hydroxyl terminated propellant and the lining as claimed in claim 1, wherein the hydroxyl terminated propellant with IPDI as the curing agent comprises 87 to 89 parts by weight of the total amount of the oxidizer, the explosive and the metal fuel, 10.5 to 12 parts by weight of the hydroxyl terminated adhesive, the IPDI and the plasticizer, and 0.1 to 0.5 part by weight of the auxiliary agent.
10. The application of the IPDI solution diluted by the plasticizer in improving the bonding performance of the IPDI type hydroxyl-terminated propellant and the lining interface is disclosed.
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| CN202111518023.8A CN114371122A (en) | 2021-12-13 | 2021-12-13 | Method for improving interface bonding performance of IPDI (isophorone diisocyanate) type butylated hydroxytoluene propellant and lining |
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