CN109406344A - A method of characterization azide polyethers elastomer surface and interface characteristic - Google Patents
A method of characterization azide polyethers elastomer surface and interface characteristic Download PDFInfo
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- CN109406344A CN109406344A CN201811085081.4A CN201811085081A CN109406344A CN 109406344 A CN109406344 A CN 109406344A CN 201811085081 A CN201811085081 A CN 201811085081A CN 109406344 A CN109406344 A CN 109406344A
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Abstract
The present invention relates to a kind of methods for characterizing azide polyethers elastomer surface and interface characteristic, prepare containing different AP, RDX, HMX, aluminium powder azide polyethers film, six kinds of different reference liquids are tested respectively in the contact angle of different azide polyethers film faces using dynamic Contact horn cupping, reference liquid is divided into water, ethylene glycol, formamide polarity reference liquid and diiodomethane, α-bromonaphthalene, hexamethylene nonpolarity reference liquid, polarity reference liquid and nonpolar reference liquid combination of two, calculate the surface energy of different filler azide polyethers films.Solid surface energy measured by the method that the present invention uses is for evaluating azide polyethers propellant filler-matrix surface and interface characteristic with good effect, and method is simple, and measuring accuracy is high.
Description
Technical field
The present invention relates to azide polyethers propellant filler-basal body interface mechanism of action, and in particular to a kind of azide polyethers base
Body-filler surface and interface characteristic present's method.
Background technique
Azide polyethers propellant be it is a kind of with high energy, insensitiveness, low signature high performance solid propellants, meet it is more
The demand of kind sophisticated missile weapon is the emphasis studied in the industry at present.PBT propellant is using polyurethane elastomer as adhesive
The Composite Energetic Materials of matrix, one of the key technology that mechanical property is adjusted to for such propellant research and development.Due to PBT
Side chain is containing a large amount of rigid azido groups, and polymer molecular chain is short, and flexibility is poor, and especially cryogenic mechanics performance is poor, it has also become
The technical bottleneck of its wide warm adaptability.Therefore, carry out relevant fundamental research, for solving the wide temperature of azide polyethers propellant
The bad phenomenon of range interior mechanics performance has great importance.
The mechanical property of composite solidpropellant depend primarily on the mechanical characteristic of matrix, filler reinforcing character and fill out
Interfacial adhesion characteristic between material-matrix, wherein good filler-matrix adhesive property gives full play to mechanics of elastic bodies performance
Premise.The matrix of azide polyethers propellant is mainly made of highly plasticized azide polyethers elastomer PBT, and filler is mainly (high by AP
Ammonium chlorate), RDX (heisuojin), the composition such as HMX (octogen) and aluminium powder.These solid packings are dis-reinforcing filler, and
There are larger differences for the polarity of filler and matrix.Therefore, filler-matrix adhesive property, which becomes, influences azide polyethers propellant
The key of mechanical property.Study filler-matrix adhesive property, it is necessary first to understand filler-matrix surface and interface characteristic.Due to
Azide polyethers propellant wire feeding is more, and component interaction mode is also various on interface type, interface.Currently, lacking nitrine
Polyether propellants filler-matrix surface and interface effect quantitatively characterizing method, filler-basal body interface mechanism of action are also difficult to determine.
In addition, azide polyethers propellant system formulation composition differs greatly with existing tested recipe HTPB, NEPE propellant, it is difficult to use
Existing technical know-how is evaluated.
It can be subsequent therefore, it is necessary to establish a kind of filler in azide polyethers propellant-matrix surface and interface effect characterizing method
Improve filler-basal body interface bonding characteristic and the related ginseng of structure-activity relationship offer of azide polyethers mechanical properties of propellant is provided
Number regulates and controls method to establish wide warm azide polyethers propellant matrix-filler interface, and design, synthesis and screening meet wide temperature and use
It is required that novel bonding agent lay the foundation.
Summary of the invention
The purpose of the present invention is establishing a kind of characterizing method, for characterizing azide polyethers propellant filler-matrix table
Surface properties and interfacial interaction have important directive significance to the research of azide polyethers propellant macro-mechanical property.
In order to solve the above-mentioned technical problem, the present invention establishes a kind of characterization side of azide polyethers elastomer surface and interface characteristic
Opposed polarity-nonpolarity reference liquid is combined using contact angle test, measures different wire feedings to azide polyethers by method
The contact angle of film calculates the surface energy of azide polyethers film.
The characterizing method of above-mentioned azide polyethers elastomer surface and interface characteristic, wherein the contact angle test is using dynamic
Contact angle instrument.
The characterizing method of above-mentioned azide polyethers elastomer surface and interface characteristic, wherein the opposed polarity-nonpolarity reference liquid
Respectively water, ethylene glycol, formamide polarity reference liquid, diiodomethane, α-bromonaphthalene, hexamethylene nonpolarity reference liquid.Three kinds of polarity
Reference liquid and three kinds of nonpolar reference liquids carry out combination of two.
The characterizing method of above-mentioned azide polyethers elastomer surface and interface characteristic, wherein it is described difference fillers be AP, RDX, HMX,
Aluminium powder.
Compared with prior art, the present invention not only establishing filler-matrix table in the completely new azide polyethers propellant of one kind
The characterizing method of interfacial characteristics has filled up propellant filler-matrix surface and interface Performance Testing Technology blank, and this method operates
Simplicity, instrument condition be easier to realize, test data error is small, and precision is high, highly reliable.Therefore, this method is that evaluation solid pushes away
Foundation is provided into the packing screening in agent filler-matrix interfacial bond property and solid propellant synthesis process.
Detailed description of the invention
A kind of method of characterization azide polyethers elastomer surface and interface characteristic of the invention is given by examples and drawings below
Out.
Fig. 1 is the test process flow chart of azide polyethers elastomer surface and interface characteristic.
Specific embodiment
Referring to the attached drawing for showing the embodiment of the present invention, the present invention is described in more detail.
Suitable azide polyethers system parameter is chosen, adds different one-component solids respectively in azide polyethers system
Filler (AP, RDX, HMX, aluminium powder), using conventional solid propellant manufacture craft, by weighing, mixing, be poured, vacuumize,
The azide polyethers film containing different fillers is made in the processes such as solidification.
In order to reduce the maximum relative error of solid material surface energy as far as possible, reference liquid of the invention selects three kinds of polarity
Reference liquid and three kinds of nonpolar reference liquids, are water, ethylene glycol, formamide polarity reference liquid, diiodomethane, α-bromonaphthalene, ring respectively
Hexane nonpolarity reference liquid.The surface characteristic and component data of reference liquid used in the present invention are shown in Table 1.
1 reference liquid surface characteristic of table and component data
Specific test operating procedure is as follows: (1) conditioning instrumentation sample stage and light source are at optimum state;(2) it calibrates
Contact angle instrument realizes horizontal alignment to horizontal position;(3) sample injector syringe needle interface is calibrated, realizes vertical calibration;(4) control mark
It is 1~5 μ L that sample liquid, which drips dosage, and transfers them to sample surfaces;(5) level is finely adjusted with tangent line curve, is contacted
Angle test data.
According to the above test mode measure respectively water, ethylene glycol, formamide polarity reference liquid blank azide polyethers film,
The film of azide polyethers containing AP, the film of azide polyethers containing RDX, the film of azide polyethers containing HMX and the film of azide polyethers containing aluminium powder five
The contact angle of kind of sample surfaces, every group sample parallel testing five times, take contact angle average value, error is not more than 2 °.
It is poly- in blank nitrine that diiodomethane, α-bromonaphthalene, hexamethylene polarity reference liquid are measured respectively according to the above test mode
Ether film, the film of azide polyethers containing AP, the film of azide polyethers containing RDX, the film of azide polyethers containing HMX and azide polyethers containing aluminium powder
The contact angle of five kinds of sample surfaces of film, every group sample parallel testing five times, take contact angle average value, error is not more than 2 °.
Three kinds of polarity reference liquids and three kinds of nonpolar reference liquids carry out combination of two, and it is poly- to calculate different nitrine by formula (1)
The dispersion force of ether film faceAnd polar forces
In formula:
γL--- the surface energy of reference liquid, mN/m;
Contact angle of θ --- the reference liquid on different nitrine glue polyethers surfaces;
--- the dispersion force of different azide polyethers film faces, mN/m;
--- the polar forces of different azide polyethers film faces, mN/m;
--- the dispersion force on reference liquid surface, mN/m;
--- the polar forces on reference liquid surface, mN/m.
The surface energy of different nitrine glue is calculated by formula (2).
In formula:
γS--- the surface energy of different azide polyethers films, mN/m;
--- the dispersion force of different azide polyethers film faces, mN/m;--- different azide polyethers film faces
Polar forces, mN/m.
Claims (6)
1. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic, which is characterized in that utilize dynamic contact angle, measurement is not
It is poly- to calculate different nitrine in the contact angle containing different filler azide polyethers film faces for same polarity and nonpolar reference liquid
The surface energy of ether film.
2. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic according to claim 1, which is characterized in that institute
Contact angle determination is stated using dynamic contact angle analyzer.
3. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic according to claim 1, which is characterized in that institute
Stating polarity reference liquid is water, ethylene glycol, formamide, and nonpolar reference liquid is diiodomethane, α-bromonaphthalene, hexamethylene.
4. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic according to claim 3, which is characterized in that institute
It states polarity reference liquid and three kinds of nonpolar reference liquids carries out combination of two.
5. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic according to claim 1, which is characterized in that institute
Stating different fillers is AP, RDX, HMX, aluminium powder.
6. a kind of method for characterizing azide polyethers elastomer surface and interface characteristic according to claim 1, which is characterized in that institute
The surface for stating different azide polyethers films can be decomposed into dispersion forceAnd polar forces
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Cited By (4)
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CN109942354A (en) * | 2019-04-16 | 2019-06-28 | 中国人民解放军国防科技大学 | PBT propellant low-temperature mechanical property estimation method based on contact angle data and formula |
CN110018267A (en) * | 2019-04-16 | 2019-07-16 | 中国人民解放军国防科技大学 | Low-temperature mechanical property estimation method for PBT propellant based on reversed-phase gas chromatography data and formula |
CN110043393A (en) * | 2019-04-16 | 2019-07-23 | 中国人民解放军国防科技大学 | High-temperature mechanical property estimation method of PBT propellant based on contact angle data and formula |
CN112986130A (en) * | 2019-12-16 | 2021-06-18 | 乐凯华光印刷科技有限公司 | Characterization method for interface characteristics of flexible resin plate support body and photosensitive elastomer |
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Application publication date: 20190301 |