CN106841328A - A kind of coplanar capacitance formula polymer molecule orientation measurement means and method - Google Patents
A kind of coplanar capacitance formula polymer molecule orientation measurement means and method Download PDFInfo
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Abstract
The invention discloses a kind of coplanar capacitance formula polymer molecule orientation measurement means and method, wherein the measurement apparatus include sensor probe array (10), capacitance measurement unit (13) and orientation computation module (14), wherein, sensor probe array (10) includes multigroup coplanar electrodes；Any one group of coplanar electrodes include at least two conductive electrodes；Capacitance measurement unit (13) obtains multigroup capacitance data for measuring the electric capacity between any two conductive electrode in same coplanar electrodes；Orientation computation module (14) is then used to be calculated according to multigroup capacitance data the molecularly oriented of weight polymers to be measured.The present invention utilizes the anisotropy of polymeric material dielectric properties, polymer molecule is measured by coplanar-electrode structure to be orientated, establish the relation of orientation dielectric capacitance three, it is adaptable to all kinds of polymer, belong to Non-Destructive Testing, the features such as with high precision, response fast, non-intrusion type.
Description
Technical field
The invention belongs to Polymer Processing forming process detection field, more particularly, to a kind of polymerization of coplanar capacitance formula
Thing molecularly oriented measurement apparatus and method, the device and method can be used to measure molecularly oriented during forming polymer.
Background technology
The polymer various premium properties such as have abundant raw material, easy to process, specific strength high, resistant to chemical etching, thus
All trades and professions are widely used.During forming polymer, polymer molecular chain takes with the flow behavior of melt
To, and the difference sheared everywhere with melt, certain distribution of orientations is presented.The final distribution and change of the orientation of polymer molecule
Change history is decide during mechanical property, optical property and the thermophysical property, therefore forming polymer of polymeric articles
Molecularly oriented measurement is significant for the determination of properties of product.
At present, the polymer molecule orientation measuring method of open report mainly has two major classes：The first kind is off-line measurement, compared with
What is early proposed has X-ray diffraction method.X-ray diffraction is the crystallographic important means of research, in terms of polymer, using X-ray
The conformation of diffraction energy microreaction macromolecular chain and local segment relation, therefore taken using X-ray diffraction measurement polymer molecule
To being also gradually taken seriously, such as Wide angle X-ray diffraction (WAXD) and small angle X-ray diffraction (SAXS) are long with diffraction circular arc respectively
Spend with disperse scattering strength to measure the degree of orientation.Contemporaneity also has Birefringence Method and infrared dichroism method, wherein birefringence
Method weighs the degree of orientation using refringence in two orthogonal directions, but is only applicable to transparent material and optical instrument debugging
Complexity, and infrared dichroism method measures the degree of orientation according to the anisotropy of orientation sample INFRARED ABSORPTION.Generally, these are offline
Measuring method have the shortcomings that sample making course it is complicated, cannot on-line checking.
Equations of The Second Kind is on-line checking, and its method is less, and what is proposed at present has ultrasonic Method for Measuring.For example written by Zhao Peng etc.
Document《Plastic Injection Shaping Process on-line checking based on ultrasonic technique》In, the change using ultrasonic signal in injection moulding process is dissolved
Release the change of polymer melt structural form.Document written by Edward R etc.《On-line measurement of polymer
orientation using ultrasonic technology》Middle use ultrasonic shear waves on-line checking polymer is in mould
Orientation behavior in die cavity.But the research of current this respect, will also be to ultrasound during practical application mostly also in laboratory stage
The aspects such as the analysis and treatment of the theory relation, ultrasonic signal of testing equipment, ultrasonic signal and polymer orientation are further studied.
In the Chinese patent literature of Publication No. CN102012400A, there is provided a kind of ultrasonic velocity detection tubing takes
To the method for degree, by ultrasonic test multiple Pipe samples velocities of sound in material differently- oriented directivity, recycle infrared two to
Color method is demarcated, and obtains the homologous thread of ultrasonic velocity and the degree of orientation.But the method must carry out section test to sample,
Calibration process is complicated, is unfavorable for on-line measurement, and the scope of application is only limitted to polymer pipe.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, it is an object of the invention to propose that a kind of coplanar capacitance formula is gathered
Adduct molecule orientation measurement means and method, wherein by the side of being oppositely arranged to multigroup coplanar electrodes crucial in measurement apparatus
The shape of conductive electrode and the parameter type of relative position setting and measurement etc. are improved in formula, every group of coplanar electrodes, with
Prior art is compared and can effectively solve the problem that the molecularly oriented measurement difficulty of polymer, measuring method are only applicable to part given shape
Polymer etc. problem, the present invention establishes orientation-dielectric-electric capacity using the anisotropy of polymeric material dielectric properties
The relation of three, it is adaptable to all kinds of polymer, belongs to Non-Destructive Testing, the features such as with high precision, response fast, non-intrusion type, and
The measurement apparatus and method can be used for the polymer molecule orientation on-line measurement of true processing environment, and flexibility ratio is higher and applicable model
Enclose wider.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of coplanar capacitance formula polymer molecule takes
To measurement apparatus, it is characterised in that including sensor probe array (10), capacitance measurement unit (13) and orientation calculation mould
Block (14), wherein,
The sensor probe array (10) includes multigroup coplanar electrodes for being arranged in dielectric base (9)；
For coplanar electrodes described in any one group, including at least two conductive electrodes, also, any one of conduction
Electrode is respectively provided with strip-like electrode structures；For conductive electrode, their bar described in any two in the same coplanar electrodes
Shape electrode structure is parallel to each other, and keeps constant spacing；Electric capacity between conductive electrode described in any two is by be measured poly-
The influence of compound；Also, for coplanar electrodes described in any one group, it is defined in the substrate (9) plane and coplanar with this
The parallel straight line of strip-like electrode structures in electrode is the arrangement straight line of the coplanar electrodes；
The capacitance measurement unit (13) is connected with the sensor probe array (10), for measuring described in same group altogether
Electric capacity between conductive electrode described in any two in the electrode of face, and obtain corresponding with multigroup coplanar electrodes multigroup
Capacitance data；
The orientation computation module (14) is connected with the capacitance measurement unit (13), for according to the capacitance measurement list
Described multigroup capacitance data that first (13) measurement is obtained calculates the molecularly oriented of the weight polymers to be measured；
Additionally, the described multigroup coplanar electrodes on the sensor probe array (10) are at least 4 groups of coplanar electrodes, with this
Coplanar electrodes described in 4 groups in a little coplanar electrodes as 2 coplanar electrode array units, wherein, each described coplanar electrodes battle array
Column unit includes coplanar electrodes described in 2 groups；For coplanar electricity described in 2 groups in the same coplanar electrode array unit
Pole, the angle between the arrangement straight line of this coplanar electrodes described in 2 groups is 90 °；
For this 2 coplanar electrode array units, any one group of row of coplanar electrodes in one of array element
The arrangement straight line of any one group of coplanar electrodes in cloth straight line, with another array element, the angle between this two straight lines is
45°。
Used as present invention further optimization, it is unit positive direction to define any one direction on substrate (9) face,
Then for coplanar electrodes described in any one group, the angle between the arrangement straight line and the unit positive direction of the coplanar electrodes is 0 °~
180°。
It is any one in the coplanar electrodes for coplanar electrodes described in any one group as present invention further optimization
The individual conductive electrode includes multiple strip-like electrode structures, and these list structures are parallel to each other and pass through each other
Conductive structure is connected.
As present invention further optimization, for coplanar electrodes described in any one group, including three conductive electrodes with
And a substrate (4), remember that these three conductive electrodes are respectively the first conductive electrode (1), the second conductive electrode (2) and the 3rd
Conductive electrode (3)；Preferably, first conductive electrode (1), second conductive electrode (2) and the 3rd conductive electricity
Pole (3) is respectively positioned on the same face of the substrate (9).
As present invention further optimization, for coplanar electrodes described in any one group, first conductive electrode (1) with
Second conductive electrode (2) cross-cutting distribution, any one of strip-like electrode structures in second conductive electrode (2)
Away from adjacent thereto and belong to the distance of strip-like electrode structures in first conductive electrode (1) and keep fixing；
3rd conductive electrode (3) between first conductive electrode (1) and second conductive electrode (2),
The distance of the 3rd conductive electrode (3) any one strip-like electrode structures in first conductive electrode (1) keeps fixing, should
The distance of the 3rd conductive electrode (3) any one strip-like electrode structures in second conductive electrode (2) keeps fixing；And
And, the 3rd conductive electrode (3) in first conductive electrode (1) distance of any one strip-like electrode structures with it is described
3rd conductive electrode (3) both distances of any one strip-like electrode structures in second conductive electrode (2) are unequal.
As present invention further optimization, when the conductive electrode in coplanar electrodes described in any one group is two
When,
The capacitance measurement unit (13) belong to same described coplanar in 2 coplanar electrode array units for measuring
Electric capacity between in electrode, two conductive electrodes, and obtain and 4 groups of institutes in 2 coplanar electrode array units
State 4 corresponding capacitance datas of coplanar electrodes；
The orientation computation module (14) according to the capacitance measurement unit (13) for measuring 4 electric capacity for obtaining
Data calculate the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4It is 4 capacitance datas that the capacitance measurement unit (13) measurement is obtained, C1、C2It is right
Answer same coplanar electrode array unit, C3、C4Corresponding another coplanar electrode array unit.
Used as present invention further optimization, the capacitance measurement unit (13) is for measuring 2 coplanar electrodes battle array
Electric capacity between two conductive electrodes for belong in the same coplanar electrodes in column unit, being pre-selected, and obtain
4 capacitance datas corresponding with 4 coplanar electrodes in 2 coplanar electrode array units；It is described to be pre-selected
Two conductive electrodes be the first conductive electrode and the second conductive electrode, or be the first conductive electrode and the 3rd conductive electrode,
Or be the second conductive electrode and the 3rd conductive electrode；
The orientation computation module (14) according to the capacitance measurement unit (13) for measuring 4 electric capacity for obtaining
Data calculate the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4It is 4 groups of capacitance datas that the capacitance measurement unit (13) measurement is obtained, C1、C2It is right
Answer same coplanar electrode array unit, C3、C4Corresponding another coplanar electrode array unit.
As present invention further optimization, when two for being pre-selected in the capacitance measurement unit (13) lead
When electrode changes, the orientation computation module (14) is then used to be calculated one group of molecularly oriented θ.
Used as present invention further optimization, the substrate (9) is on forming polymer mould intracavity wall (12)；
And the substrate (9) scribbles the dielectric base (9) of insulating coating for surface.
It is another aspect of this invention to provide that the invention provides a kind of coplanar capacitance formula polymer molecule orientation measurement side
Method, the measuring method is using a kind of above-mentioned coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that including with
Lower step：
(1) by least one sensor probe array (10) on forming polymer mould intracavity wall (12), and should
Coplanar electrodes in sensor probe array (10) are connected with capacitance measurement unit (13)；
(2) perform Polymer moulding step, carried out using in forming polymer die cavity the polymer of processing and forming as
Weight polymers to be measured, and the capacitance that the capacitance measurement unit (13) is exported is adopted according to the timing of default sampling period
Collection；
(3) capacitance collected according to synchronization, calculates the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4The capacitance data that the capacitance measurement unit (13) described in synchronization is collected, C1、C2It is right
Answer the same coplanar electrode array unit in 2 coplanar electrode array units, C3、C4In 2 coplanar electrode array units of correspondence
Another coplanar electrode array unit；C1、C2、C3、C4The distance between corresponding two conductive electrodes being pre-selected are each other
It is equal, it is preferred that the two conductive electrodes are the first conductive electrode and the second conductive electrode, or are the first conductive electrode
With the 3rd conductive electrode, or the second conductive electrode and the 3rd conductive electrode are；
Obtain a series of molecularly oriented θ of weight polymers to be measured for changing over time.
By the contemplated above technical scheme of the present invention, compared with prior art, measure poly- by coplanar-electrode structure
Adduct molecule is orientated, and using dielectric properties anisotropy principle, establishes the relation of orientation-dielectric-electric capacity three.Profit of the invention
With the structural advantage of coplanar electrodes, by measuring on different scattering electric field directions the capacitance size of orientated polymer, calculate poly-
The orientation of adduct molecule, overcoming in the orientation measurement of conventional polymer molecule cannot on-line checking, differently- oriented directivity be indefinite etc. lacks
Point.This method uses electric parameter measurement, belongs to Non-Destructive Testing, it is adaptable to all kinds of polymer, with high precision, responds fast, non-invading
Enter formula, the features such as measuring method is simple, for measurement and the analysis of molecularly oriented during forming polymer provide it is a kind of effective
Means, and can be widely used in the quality control of polymeric articles.Particularly, have the following advantages that：
1) measurement by capacitance is applied to all kinds of polymer (insulating materials), including transparent, translucent and opaque material, and
Electric signal high precision, response are fast；
2) coplanar capacitance formula simple structure, it is convenient to install, and can be integrated with measuring circuit；
3) electric capacity modeling is simple, it is easy to analyze the theory relation of electric capacity and orientation；
4) lossless audio coding of polymer molecule orientation is capable of achieving, with non-intrusion type feature.
A kind of coplanar capacitance formula polymer molecule orientation measurement means, employ the additional base of coplanar-electrode structure in the present invention
Bottom material, and sensor probe array is arranged in mold cavity, flexibility ratio is higher and adaptability is wider.Further, it is coplanar
Distance produces three kinds of different penetration depths two-by-two, after combination of two between three conductive electrodes in electrode structure, it is possible to achieve
The orientation measurement of polymer melt same position different-thickness.For the lamination easily occurred during forming polymer,
The present invention can measure the state of orientation of different one polymer, and the polymer orientation information for obtaining is more accurate.In addition, for material
Solid state and melt state, both contact situations between sensor are different, are in close contact between melt and sensor,
In the absence of air gap layer, and for solid state, although there is the air gap in the present invention, obtained by coplanar electrodes
Scattering electric field has certain penetration depth, therefore the present invention can be measured accurately the detected materials of solid-state and molten state, and with
Traditional multi-wavelength coplanar-electrode structure is compared, the present invention in coplanar electrodes measurement be the same area, in the absence of because of region not
Solid-state polymer to be measured is caused to measure inaccurate problem with force unbalance.
A kind of coplanar capacitance formula polymer molecule orientation measuring method, without sample to be tested set-up procedure, adopts in the present invention
Dynamic Non-Destruction Measurement on-line measurement is used, method is simple, easily implements, and is electric parameter measurement, and high precision is easy to polymeric material material
Manage the judgement of mechanical performance.Further, this sensor probe is installed in multiple positions in cavity wall, can be with on-line measurement polymer
The distribution of orientations of diverse location different depth melt in forming process.
Brief description of the drawings
Fig. 1 is conductive in any one coplanar electrodes in coplanar capacitance formula orientation measurement sensor linear transducer array in the present invention
Electrode and substrate schematic diagram；
Fig. 2 is coplanar capacitance formula orientation measurement sensor linear transducer array schematic diagram of the present invention；
Fig. 3 is the position of the main dielectric tensors of polymeric material to be measured, main dielectric tensors coordinate system and sensor probe array
Relation schematic diagram；
Fig. 4 is the operating diagram of coplanar capacitance formula orientation measurement means in the present invention；
Fig. 5 is operating diagram of the coplanar capacitance formula orientation measurement means in torque rheometer in the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as additionally, technical characteristic involved in invention described below each implementation method
Not constituting conflict each other can just be mutually combined.
A kind of coplanar capacitance formula polymer molecule orientation measurement means in the present invention, as shown in figure 4, including coplanar capacitance formula
Orientation measurement sensor linear transducer array (10), capacitance measurement unit (13) and orientation computation module (14), described coplanar capacitance
Formula be orientated measurement sensor linear transducer array (10) on polymeric molds cavity wall (i.e. forming polymer mould intracavity wall (12)),
Including base material (9), coplanar electrodes (5) (6) (7) (8) and insulating coating, as shown in Fig. 2 described coplanar electrodes with
Capacitance measurement unit (13) is connected.Because forming polymer mould intracavity wall (12) is much larger than sensor probe array (10), therefore
The sensor probe array (10) can still be approximately a plane.
Further, described coplanar capacitance formula is orientated measurement sensor linear transducer array (10) includes multigroup coplanar electrodes knot
Structure, its number be 4 groups and more than, and different design angles of correspondence.
Further, the number of the coplanar-electrode structure is 4 groups, is divided into 2 array elements, and each array element is by 2 groups
Coplanar electrodes are constituted, and (design angle is to be made with any one direction on substrate (9) face to correspond to different design angles respectively
It is unit positive direction, such as sensor probe array length direction, the unit positive direction and coplanar interelectrode angle).
Further, the corresponding design angle of 4 groups of coplanar-electrode structures is respectively positioned between 0 ° -180 °, and same battle array
The design angle of coplanar-electrode structure differs 90 ° in column unit.
Further, the corresponding design angle of coplanar-electrode structure differs 45 ° in 2 array elements, therefore 4 groups coplanar
The corresponding design angle of electrode structure includes but is not limited to 0 °, and 45 °, 90 °, 135 ° (0 ° of i.e. correspondence unit positive direction is parallel to it
In 1 group of situation of coplanar-electrode structure).
Further, described coplanar-electrode structure includes three conductive electrodes 1,2,3 and a substrate 4, as shown in figure 1,
Each described conductive electrode is connected with capacitance measurement unit (13).
Further, three described conductive electrodes include that the first conductive electrode (1), the second conductive electrode (2) and the 3rd are led
Electrode (3), is respectively positioned on substrate (4), and described substrate (4) is on base material (9).
Further, the first described conductive electrode and the second conductive electrode respectively include many be parallel to each other it is dispersed
The electrode strip of arrangement, interlaced arrangement and does not connect mutually.3rd conductive electrode is embedded in the first conductive electrode including one
And the second sinuous rectangular electrode bar between conductive electrode gap, and it is vertical with the first conductive electrode and the second conductive electrode away from
From difference, spacing is different two-by-two for three conductive electrodes.
Accordingly, a kind of coplanar capacitance formula polymer molecule orientation measuring method in the present invention, including coplanar capacitance formula is passed
The design of sensor linear transducer array and installation, the measurement of linear transducer array capacitance and the polymer molecule based on capacitance orientation point
Analysis, specifically, including：
1) at least one coplanar capacitance formula orientation measurement sensor linear transducer array is arranged on polymeric molds cavity wall
(12) on, and the coplanar electrodes of sensor probe array are connected with capacitance measurement unit (13)；
2) Polymer moulding step, the orientation measurement sensor linear transducer array contact measured polymerization of coplanar capacitance formula are performed
Thing material (11), is acquired, by difference according to the timing of default sampling period to the output capacitance value of capacitance measurement unit
Electrode combination, obtain on measurement point polymer four direction, three, each direction capacitance of thickness position, as a result such as following table
Shown in table 1.
Table 1
3) same thickness electric capacity result is chosen, the orientation of polymer molecule is calculated according to following electric capacity-orientation conversion formula
Angle (polymer molecule is orientated the angle with the sensor probe array length direction), specific switch process is
3.1) for anisotropic material, its dielectric constant can be represented with dielectric tensors ε under arbitrary system,
Wherein, εxx,εyy,εzzIt is dielectric tensors to angular amount, εxy, εyx, εyz, εzy, εxz, εzxIt is non-right for dielectric tensors
Angular amount.Face on the basis of the plane where the sensor detection array, Ze directions are its normal direction, dielectric tensors can abbreviation be three pivot shapes
Formula is as follows
With main dielectric tensors component ε1, ε2, ε3Corresponding coordinate system is referred to as master coordinate system x1x2x3, as shown in figure 3, main dielectric
Direction is consistent with polymer molecule orientation.
3.2) according to theory deduction, after contact medium material, if the length direction Xe axles and dielectric of sensor detection array
Component of tensor ε1Direction is at an angle of θ, then coplanar electrodes capacitance computing formula is as follows
The interelectrode capacitance C of a pair of conductive in similarly orthogonal coplanar capacitance structureθ+π/2
Wherein, 2C0It is this capacitance to conductive electrode in a vacuum, can be calculated by electrode structure parameter, εsIt is
The dielectric constant of base material,θ is the angle of orientation of polymer molecule, when the angle of orientation is 0 °, table
Show that sensor probe array direction is consistent with polymer molecule differently- oriented directivity.
3.3) two groups of orthogonal coplanar capacitance structures are chosen and seeks the difference of its electric capacity, you can obtain taking for polymer molecule
To angle θ, formula is as follows
It is below specific embodiment：
Embodiment 1
Reference picture 5, obtains the oscillatory shear flow of polymer melt, therefore polymer molecule using rotational rheometer in this example
The big polymer melt of making peace of orientation flow direction it is consistent.Polymeric material selects PS (polystyrene), rheometer in this example
The dynamic rotary type rheometer of selection U.S. TA Company, Instrument models AR-1000, and concentric circles pillar pressure sensor is used,
Wherein outside cylinder 16 is fixed, radius R2=22.5mm, interior cylinder 15 is with rheometer rotary motion, radius R1=21mm.At PS melts
Between two cylindrical surface, because gap is much smaller than the radius of two cylinders between two cylinders, therefore pure shear campaign is can be approximated to be.
Specific orientation measuring method step includes：
1) at least one coplanar capacitance formula orientation measurement sensor linear transducer array is arranged on outside the fixation of rotational rheometer
On the inner surface of cylinder, so when rheometer is moved, sensor probe array and high temperature polymer PS melt contacts are can guarantee that.
2) interdigital electrode and capacitance measurement unit, rotational rheometer setting in motion, the oscillating torque signal of output are connected
Interior cylinder oscillating movement is set to produce shear flow, now sensor probe array and high temperature polymer melt contacts, Jie of PS melts
Electrical property changes, and the electric capacity for measuring also changes therewith.
3) output capacitance value of capacitance measurement unit is acquired according to the timing of default sampling period, obtains measurement point
On 4 directions of polymer melt, 3, each direction capacitance of thickness position, as a result as shown in table 1.
4) capacitance signal that will be collected using acquisition software shown in window, and according to formula (1.7) in real time by electric capacity
Conversion is calculated as the angle of orientation of polymer molecule, so that the on-line measurement in Polymer Processing to molecularly oriented is realized, here
First 4 capacitance of electrode combination output is chosen to calculate molecularly oriented
Specific orientation measurement means include：
A kind of reference picture 4, device for Polymer moulding on-line measurement molecularly oriented takes including coplanar capacitance formula
To measurement sensor linear transducer array (10), capacitance measurement unit (13) and orientation computation module (14), wherein sensor probe
Array (10) is fixedly mounted in forming polymer mold cavity wall (12), capacitance measurement unit (13) and sensor probe array
Electrode be connected.
Reference picture 2, is further used as preferred embodiment, described coplanar capacitance formula orientation measurement sensor probe battle array
Row (10) include the folder of 4 groups of coplanar-electrode structures (5), (6), (7), (8), electrode direction and sensor probe array length direction
Angle is respectively 0 °, 45 °, 90 °, 135 °.
Reference picture 1, is further used as preferred embodiment, and described coplanar-electrode structure includes 3 conductive electrodes
(1), (2), (3) and substrate (4), each described conductive electrode are connected with capacitance measurement unit (13).Reference picture 1, enters one
Used as preferred embodiment, 3 described conductive electrodes include the first conductive electrode (1), the second conductive electrode (2) and the to step
Three conductive electrodes (3), are respectively positioned on substrate (4).Described the first conductive electrode (1) and the second conductive electrode (2) are including more
It is interdigital that root is parallel to each other, and dimensional parameters are equal, and both are interlaced to arrange and do not connect mutually.Reference picture 1, is further used as excellent
The implementation method of choosing, the 3rd conductive electrode (3) is embedded in the first conductive electrode (1) and the second conductive electrode (2) including one
Sinuous rectangular electrode bar between gap, and different from the vertical range of (1) and (2), spacing is not two-by-two for 3 conductive electrodes
Together.
Reference picture 2, is further used as preferred embodiment, and the base material (9) can select flexible material, described
Substrate (4) is on flexible base material.
A kind of coplanar capacitance formula polymer molecule orientation measurement means in the present invention, on sensor probe array (10) at least
Including 4 groups of coplanar electrodes (this 4 groups of coplanar electrodes according to arrangement straight line be distributed on request, and according to arrangement straight line difference, this
4 groups of coplanar electrodes are divided into 2 coplanar electrode array units；Fig. 2 shows a kind of arrangement situation of this 4 groups of coplanar electrodes, its
Middle coplanar electrodes (5), coplanar electrodes (6) belong to same coplanar electrode array unit, coplanar electrodes (7), coplanar electrodes (8) category
In another coplanar electrode array unit)；When the coplanar electrodes quantity on sensor probe array (10) more than 4 groups (such as 5 groups, 6
Group) when, then 4 groups of coplanar electrodes for wherein meeting the requirement of 2 coplanar electrode array units can be only chosen, and measures this 4 groups and be total to
The coplanar capacitance formed between corresponding 2 conductive electrodes (2 conductive electrodes e.g., being pre-selected) in the electrode of face.
According to scattering electric field principle, the distance between electrode combination difference, field penetration ability is also different；When being pre-selected
Two conductive electrodes change when (for example, from the combination of the first conductive electrode and the second conductive electrode, being changed into the first conductive electrode
With the combination of the 3rd conductive electrode), the distance between the electrode combination being directed to during due to measurement electric capacity changes, by energy
(by taking Fig. 5 as an example, depth direction is from external diameter R enough to reflect the molecularly oriented of different depth polymer2The center of circle is pointed to, namely is referred to
To internal diameter R1Radial direction), therefore, in measurement apparatus of the present invention, for any 1 group of coplanar electrodes, the first conductive electrode with
The spacing between spacing, the first conductive electrode and the 3rd conductive electrode, the second conductive electrode between second conductive electrode and
Spacing three between three conductive electrodes keep it is different (quantity of certain conductive electrode can also increase as needed, at least 2
It is individual)；On the other hand, to ensure the accuracy for using measurement apparatus of the present invention detect the test result for obtaining, as 2 altogether
The spacing between the corresponding conductive electrode of 4 groups of coplanar electrodes in the electrod-array unit of face must be consistent, this 4 groups of conductive electrodes
In addition to arrangement straight line difference, other structures or shape are intended to keep identical to set.
In sensor probe array (10), be separated from each other between any one conductive electrode and other conductive electrodes, that
This is not connected mutually (measured capacitance value between otherwise two conductive electrodes will lose meaning)；For any one conductive electrode bag
The situation of multiple strip-like electrode structures is included, these list structures are parallel to each other and connected (conductive by conductive structure each other
The material that the material that structure is used can be used with strip-like electrode structures is identical), as shown in Figure 1.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, it is not used to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that including sensor probe array (10),
Capacitance measurement unit (13) and orientation computation module (14), wherein,
The sensor probe array (10) includes multigroup coplanar electrodes for being arranged in dielectric base (9)；
For coplanar electrodes described in any one group, including at least two conductive electrodes, also, any one of conductive electrode
It is respectively provided with strip-like electrode structures；For conductive electrode described in any two in the same coplanar electrodes, their strip electricity
Pole structure is parallel to each other, and keeps constant spacing；Electric capacity between conductive electrode described in any two receives weight polymers to be measured
Influence；Also, for coplanar electrodes described in any one group, be defined on it is in the substrate (9) plane and with the coplanar electrodes
In the parallel straight line of strip-like electrode structures be the coplanar electrodes arrangement straight line；
The capacitance measurement unit (13) is connected with the sensor probe array (10), for measuring coplanar electricity described in same group
Electric capacity between conductive electrode described in extremely interior any two, and obtain the multigroup electric capacity corresponding with multigroup coplanar electrodes
Data；
The orientation computation module (14) is connected with the capacitance measurement unit (13), for according to the capacitance measurement unit
(13) described multigroup capacitance data that measurement is obtained calculates the molecularly oriented of the weight polymers to be measured；
Additionally, the described multigroup coplanar electrodes on the sensor probe array (10) are at least 4 groups of coplanar electrodes, it is common with these
Coplanar electrodes described in 4 groups in the electrode of face as 2 coplanar electrode array units, wherein, each described coplanar electrode array list
Unit includes coplanar electrodes described in 2 groups；For coplanar electrodes described in 2 groups in the same coplanar electrode array unit, this 2
Angle between the arrangement straight line of the group coplanar electrodes is 90 °；
For this 2 coplanar electrode array units, the arrangement of any one group of coplanar electrodes is straight in one of array element
The arrangement straight line of any one group of coplanar electrodes in line, with another array element, the angle between this two straight lines is 45 °.
2. a kind of coplanar capacitance formula polymer molecule orientation measurement means as claimed in claim 1, it is characterised in that definition is described
Any one direction on substrate (9) face is unit positive direction, then for coplanar electrodes described in any one group, the coplanar electrodes
Angle between arrangement straight line and the unit positive direction is 0 °~180 °.
3. as claimed in claim 1 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that for any
Coplanar electrodes described in one group, any one of conductive electrode in the coplanar electrodes includes multiple strip shaped electric poles knots
Structure, these list structures are parallel to each other and connected by conductive structure each other.
4. as claimed in claim 3 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that for any
Coplanar electrodes described in one group, including three conductive electrodes and a substrate (4), remember that these three conductive electrodes are respectively first
Conductive electrode (1), the second conductive electrode (2) and the 3rd conductive electrode (3)；Preferably, first conductive electrode (1), institute
State the second conductive electrode (2) and the 3rd conductive electrode (3) is respectively positioned on the same face of the substrate (9).
5. as claimed in claim 4 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that for any
Coplanar electrodes described in one group, first conductive electrode (1) and second conductive electrode (2) cross-cutting distribution, this second
Any one of strip-like electrode structures in conductive electrode (2) are away from adjacent thereto and belong to first conductive electrode (1)
In strip-like electrode structures distance keep fix；
Between first conductive electrode (1) and second conductive electrode (2), this for 3rd conductive electrode (3)
The distance of three conductive electrodes (3) any one strip-like electrode structures in first conductive electrode (1) keeps fixing, and the 3rd
The distance of conductive electrode (3) any one strip-like electrode structures in second conductive electrode (2) keeps fixing；Also, institute
State the distance and the described 3rd of the 3rd conductive electrode (3) any one strip-like electrode structures in first conductive electrode (1)
Conductive electrode (3) both distances of any one strip-like electrode structures in second conductive electrode (2) are unequal.
6. as claimed in claim 1 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that when any one
When the conductive electrode in the group coplanar electrodes is two,
The capacitance measurement unit (13) belong to the same coplanar electrodes in 2 coplanar electrode array units for measuring
Electric capacity interior, between two conductive electrodes, and obtain common with described in 4 groups in 2 coplanar electrode array units
4 corresponding capacitance datas of face electrode；
The orientation computation module (14) according to the capacitance measurement unit (13) for measuring 4 capacitance datas for obtaining
Calculate the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4It is 4 capacitance datas that the capacitance measurement unit (13) measurement is obtained, C1、C2Correspondence is same
One coplanar electrode array unit, C3、C4Corresponding another coplanar electrode array unit.
7. as claimed in claim 1 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that the electric capacity
Measuring unit (13) belong in 2 coplanar electrode array units in the same coplanar electrodes, choosing in advance for measuring
Electric capacity between two conductive electrodes selected, and obtain described coplanar with 4 in 2 coplanar electrode array units
4 corresponding capacitance datas of electrode；Two conductive electrodes being pre-selected are the first conductive electrode and the second conductive electricity
Pole, or be the first conductive electrode and the 3rd conductive electrode, or be the second conductive electrode and the 3rd conductive electrode；
The orientation computation module (14) according to the capacitance measurement unit (13) for measuring 4 capacitance datas for obtaining
Calculate the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4It is 4 groups of capacitance datas that the capacitance measurement unit (13) measurement is obtained, C1、C2Correspondence is same
One coplanar electrode array unit, C3、C4Corresponding another coplanar electrode array unit.
8. as claimed in claim 7 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that when the electricity
When two conductive electrodes being pre-selected in appearance measuring unit (13) change, the orientation computation module (14) is then used for
It is calculated one group of molecularly oriented θ.
9. as claimed in claim 1 a kind of coplanar capacitance formula polymer molecule orientation measurement means, it is characterised in that the substrate
(9) on forming polymer mould intracavity wall (12)；
And the substrate (9) scribbles the dielectric base (9) of insulating coating for surface.
10. a kind of coplanar capacitance formula polymer molecule is orientated measuring method, and the measuring method is appointed using such as claim 1-9
One a kind of coplanar capacitance formula polymer molecule orientation measurement means of meaning, it is characterised in that comprise the following steps：
(1) by least one sensor probe array (10) on forming polymer mould intracavity wall (12), and this is sensed
Coplanar electrodes in device linear transducer array (10) are connected with capacitance measurement unit (13)；
(2) Polymer moulding step is performed, the polymer of processing and forming is carried out using in forming polymer die cavity as to be measured
Weight polymers, and the capacitance that the capacitance measurement unit (13) is exported is acquired according to the timing of default sampling period；
(3) capacitance collected according to synchronization, calculates the molecularly oriented θ of the weight polymers to be measured：
Wherein, C1、C2、C3、C4The capacitance data that the capacitance measurement unit (13) described in synchronization is collected, C1、C2Correspondence 2
Same coplanar electrode array unit in coplanar electrode array unit, C3、C4It is another in 2 coplanar electrode array units of correspondence
One coplanar electrode array unit；C1、C2、C3、C4The distance between corresponding two conductive electrodes being pre-selected phase each other
Be the first conductive electrode and the second conductive electrode Deng, it is preferred that the two conductive electrodes, or be the first conductive electrode with
3rd conductive electrode, or it is the second conductive electrode and the 3rd conductive electrode；
Obtain a series of molecularly oriented θ of weight polymers to be measured for changing over time.
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