CN202928905U - Polymer film material stretching device for in-situ structure detection - Google Patents
Polymer film material stretching device for in-situ structure detection Download PDFInfo
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- CN202928905U CN202928905U CN 201220627425 CN201220627425U CN202928905U CN 202928905 U CN202928905 U CN 202928905U CN 201220627425 CN201220627425 CN 201220627425 CN 201220627425 U CN201220627425 U CN 201220627425U CN 202928905 U CN202928905 U CN 202928905U
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Abstract
The utility model provides a polymer film material stretching device for in-situ structure detection. The device is mainly composed of a high-precision servo motor, a planetary gearbox, an encoder, a driver, a tension sensor, a system integrated LabVIEW software control system, and the like; and a guide rail, a high-precision gear and a reverse lead screw are used for driving in the polymer film material stretching device. The rotating speed and the rotating displacement of the motor are controlled through LabVIEW program to realize accurate displacement and speed stretching control. The stretching device provided by the utility model has the advantages of being small in volume, light in weight, easy to assemble and disassemble, and the like; and the stretching device is very suitable for being used in combination with other detection devices, such as a synchrotron radiation experiment line station and an optical microscope, and is a superior device for researching the internal structure change during the material stretching process.
Description
Technical field
The utility model relates to the stretching device of research macromolecular material tensile property under various light sources, it can be used in conjunction the variation of online exosyndrome material structure in the stretcher strain process at the tensile property of in-situ test high molecular film material in differently strained and strain rate scope and with other checkout equipments, obtain the structural change of high molecular film material under differently strained and strain rate, the parameter such as crystallinity and the degree of orientation is coupled together these parameters and Mechanical Data subsequently and obtains the mechanism of material tensile deformation.
Background technology
The mechanical property of macromolecule membrane has great importance in routine use, and the basic skills of research mechanical property is to adopt stretching device that membraneous material is stretched, and obtains the mechanics parameter of material.The device of the research Polymer Mechanical performance that the laboratory is commonly used as the Shimadzu cupping machine of Japanese Shimadzu etc., is to adopt the mode of single shaft unilateral stretching (end is fixed, by the other end that stretches) to obtain its mechanical property.Conventional stretching device is as huge in Shimadzu cupping machine equal-volume, take up an area wide, can't realize being used in conjunction with multiple in situ detection device and the online variation that detects its micromechanism in whole stretching (compression) process of original position, be not suitable as the instrument of theoretical research stretcher strain mechanism.The sample zones of different is moved always in adopting single shaft unilateral stretching process, the accurate position at regional (hot spot) place of Position Research, and the result that obtains is like this compared with legitimate reading will produce error.In the research drawing process, the experiment of the deformation mechanism of macromolecule membrane not only needs device easy, and usually need and the conventional sense devices such as synchrotron radiation line station (synchrotron radiation infrared with X ray scattering etc.) and polarizing microscope are used in conjunction with, therefore detection window needs detachable replacement, optical channel must be very flexible.At last owing to needing to adopt different detection modes in online testing process, it is different that its time of different detection modes differentiates, so we need the interval wide and continuously adjustable mode of draw speed indirectly to realize different time resolutions.
In sum, the stretching device that high molecular film material is studied in desirable being suitable for of our imagination need to have the characteristics of following aspect: 1, stretching mode is single-axis bidirectional stretch (sample is fixed on above the chuck of two ends, and the mode by tensioning chuck stretches to sample); 2, device should light weight, and volume is little, easily dismantles and installs, and is adapted at like this synchrotron radiation line station and other are tested above conventional sense equipment; 3, for different samples, its mechanical property gap is very large and be different to the response speed of strain.Therefore we need the pulling force of device and displacement range ability scope enough greatly, the rate of extension constant interval is large and adjustable continuously; 4, the needed light hole material of different detection meanss is different, can be interchangeable flexibly therefore near the material light hole is necessary.
Sum up above 4 points, we can draw that the personnel of research high molecular film material mechanical property need be a light weight, volume little, easily dismantle and install, stretching mode is that single-axis bidirectional stretches, displacement and pulling force range ability are large, the draw speed variation range is large and adjustable continuously, and near light hole, material holds easily changeable stretching device.
Summary of the invention
The purpose of this utility model is, overcomes the deficiencies in the prior art, provide a kind of can be at synchrotron radiation line station, microscope, under the conditions such as light scattering the test high molecular film material mechanical property, but and the stretching device that carries out structure detection of real-time in-situ.This stretching device have light weight, volume little, easily dismantle and install, pulling force and displacement range ability are large and draw speed is adjustable continuously, stretching mode is that single-axis bidirectional stretches, and has the characteristics such as hyperchannel real-time data acquisition.Adopt this device can obtain the mechanical strength of material in the stretcher strain process, crystallinity, the parameters such as the degree of orientation are for the deformation mechanism of Study of Thin membrane material in the stretcher strain process offered help.
The technical solution adopted in the utility model is: a kind of high molecular film material stretching device for the original position structure detection comprises the high-precision servo motor, epicyclic gearbox, scrambler, driver, pulling force sensor, data collecting card, the LabVIEW software control system of system integration, wherein:
This device adopts the high-precision servo motor as the power system of rotating;
It is integrated that this device has adopted LabVIEW software programming high-precision servo electric machine control system that the mechanics of pulling force sensor and stretching displacement real-time data acquisition and draw speed have been carried out, and can carry out synchro control and data acquisition;
By rotating with the reverse screw mandrel of motor-driven, the slide block that moves through above guide rail with screw mandrel is delivered to above chuck this device subsequently at drawing process, realizes that single-axis bidirectional stretches.
Wherein, when material was controlled in the to-and-fro movement of stretching or resilience, system can high-precisionly carry out the control of displacement and pulling force and the collection of former bit data, can be adjusted into the constant force stretching device with constant force output under the requirement of correspondence.
The experimental technique of the above-mentioned high molecular film material stretching device for the original position structure detection of the utility model is:
Described stretching device utilizes the macromolecule material film stretching device of above-mentioned original position structure detection, the method can be at the infrared and X ray scattered ray of synchrotron radiation station, microscope, the mechanical property of test high molecular film material under the conditions such as light scattering, membraneous material is placed in above the chuck of device, the online membraneous material suffered pulling force when differently strained that detects, experimental procedure main when this device and other checkout equipments are used in conjunction is:
Step (1), with stretching device, switch board connects with host computer, opens the power supply of switch board, the sample that simultaneously we need to be tested is arranged on above miniature stretching device, needs to guarantee that batten is vertical with chuck;
Step (2), open Labview software control window, set acceleration-deceleration, rate of extension and stretching displacement;
Step (3), open detection device begin to carry out pulling force, displacement, and the data acquisition of proving installation is synchronously carried out in the collection of speed and time data.Stretch after complete stopping, stopping the collection to pulling force, displacement, speed, time and sync detection device data, and it is saved in corresponding document and (stretches after complete stopping, proceeding pulling force, displacement, the collection of speed and time data with these data.Pick-up unit continues the continuous acquisition data until after reaching necessary requirement, stop the collection of pulling force, displacement, speed, time and sync detection device data this moment, and it is saved in corresponding document);
Step (4), by different materials, the different stretch strain stretches to the macromolecule material film sample under different stretch speed and obtains the variation of inner structure in the high molecular film material drawing process.These data couplings are got up finally to obtain the mechanism of macromolecular material stretcher strain.
Wherein, control software based on Labview, control rotating speed and the time of motor, realize different strains and strain rate.
Wherein, the stretching device small volume takes up room during work very little, and the volume size is 120 * 89 * 23(mm
3).
Wherein, the suffered pulling force of drawing process situ specimen can select the motor of different ranges and stretching mode single-axis bidirectional to stretch.
Wherein, this device is restrained stretching speed (minimum-rate 0.3 μ m/s) and stretching range (maximum stretching range 40mm) accurately, accurately the deformation quantity of Quality control.
Wherein, this device can with the Through Several Survey Measure coupling, can be matched in light scattering as this device, X ray scattering, the means such as infrared spectrum characterization and polarizing microscope.
The utility model is compared innovative point with stretching device commonly used and is mainly contained:
1, the utlity model has volume little, light weight is easily dismantled and installs.
2, pulling force range of the present utility model and displacement range are large, and draw speed and displacement range are adjustable continuously in wide interval.
3, the utility model adopts high-precision motor, and screw mandrel, guide rail and transmission gear etc. can realize that the precision of displacement and draw speed is at micro-meter scale.
4, stretching mode of the present utility model is that single-axis bidirectional stretches, and has guaranteed the fixing of detected zone.
5, the utlity model has the characteristics that the real-time precise information of hyperchannel gathers.
6, the utility model can be used in conjunction with devices such as synchrotron radiation line station, microscope, light scattering, but and the stretching device that carries out structure detection of real-time in-situ.
7, application prospect of the present utility model: 1) for detection of the mechanical property of material; 2) be suitable for being used in conjunction with devices such as synchrotron radiation line station, microscope, light scattering, original position detects the structural change of membraneous material in drawing process online.
Description of drawings
Fig. 1 is that structural representation and the labview of the high molecular film material stretching device of original position structure detection described in the utility model controls the interface; Wherein, Fig. 1 (a) is a kind of high molecular film material stretching device of original position structure detection, and Fig. 1 (b) has adopted LabVIEW software programming high-precision servo electric machine control system for this device;
Fig. 2 be described in the utility model be under 0.6 μ m/s at draw speed, the stress-strain diagram in stretching isotactic polypropylene process;
Fig. 3 be described in the utility model be under 10 μ m/s at draw speed, the stress-strain diagram in stretching natural rubber process;
Fig. 4 be described in the utility model be the differently strained polypropylene 998cm that detects when being used in conjunction with synchrotron radiation infrared microscopy line station under 0.3 μ m/s at draw speed
-1The degree of orientation changes, and wherein, Fig. 4 (a), Fig. 4 (b), Fig. 4 (c) are amorphous distribution of orientations figure under 0%, 35% and 120% at macro-strain respectively.
Microphoto and the integration photo of breach near zone in the rubber drawing process that Fig. 5 (a) obtains when to be that the high molecular film material stretching device of the utility model original position structure detection and NSRL are infrared be used in conjunction with far-infrared experiment line station, Fig. 5 (b) for the infrared simple spectrum of assigned address in Fig. 5 (a) and Fig. 5 (c) for using 1210cm
-1Near the quantitative mark breach crystalline content at the white line place quantitatively and the result of match.
Fig. 6 (a) is the engineering stress strain curve of rate of extension isotactic polypropylene when being 0.6 μ m/s, and Fig. 6 (b) is the infrared microscopy picture of thin neck extended area in drawing process, and Fig. 6 (c) is the 998cm that utilizes of corresponding region
-1The degree of orientation information of mark.
Embodiment
Further illustrate the books utility model below in conjunction with drawings and Examples.
As shown in Fig. 1 (a), a kind of high molecular film material stretching device of original position structure detection comprises the high-precision servo motor, epicyclic gearbox, scrambler, driver, pulling force sensor, data collecting card, the LabVIEW software control system of system integration, wherein:
This device adopts the high-precision servo motor as the power system of rotating, and because the range of speeds is adjustable, adjustable extent is at three order of magnitude yardsticks, so can coordinate well different materials to the response of draw speed.As shown in Fig. 1 (b), this device has adopted LabVIEW software programming high-precision servo electric machine control system to carry out the mechanics of pulling force sensor and stretching displacement real-time data acquisition and draw speed integrated, can carry out synchro control and data acquisition, therefore be highly suitable for the variation of structure in the line analysis drawing process.
This device characteristic one is that the parameter that is embodied in servomotor itself is adjustable continuously in 1-4160 rev/min, and maximum (top) speed can be realized 10600 rev/mins, can satisfy like this draw speed wide interval in variation continuously.By rotating with the reverse screw mandrel of motor-driven, the slide block that moves through above guide rail with screw mandrel is delivered to above chuck subsequently at drawing process, realizes that single-axis bidirectional stretches.Two fine gear moduluses that whole device adopts are 30, can with the precision of good restrained stretching.Thread length above screw mandrel is 40mm, can realize so large displacement range.The useful range of pulling force sensor is 20N, can satisfy the requirement that high molecular film material that we commonly use stretches.
The NINI-USB6008 data collecting card that the pulling force data collection has coordinated American National instrument company to produce, sampling rate is 10Ks/s, and in experimentation the general sampling rate that adopts 1ks/s, this high speed acquisition data are very important for this oriented film material.Both realized that the resolution of pulling force acquisition time reached 1 millisecond, the deal with data complexity of also having avoided too much data point to bring simultaneously.
The large characteristics of another of this device are light weights and take up an area few.What whole submount material was selected is duralumin, and size is 120 * 89 * 23(mm
3), the height of chuck intermediate distance bottom surface is 58mm.The space that takies in experimentation is little, is very suitable for being used in conjunction with original position devices such as synchrotron radiation experiment line stations.
Device embodiment:
Referring to Fig. 1 (a): the power system of 1 stretching device of narrating for the utility model comprises high-precision servomotor, epicyclic gearbox and scrambler, the 2nd, high-precision reverse screw mandrel, the 3rd, the high precision guide rail, the 4th, chuck, the 5th, the membraneous material that is stretched, the 6th, pulling force sensor, the 7th, control and use host computer.When stretching device carries out work, at first by host computer 7 operation labview programs, control rotating speed and the time of servomotor in power system by setting draw speed and stretching displacement, drive the spider gear case by shaft coupling during electric machine rotation, with the function that realizes slowing down.Rotate by driving reverse screw mandrel 2 after gear case, chuck 4 is through being connected with reverse screw mandrel after the high precision guide rail, and along with the motion of reverse screw mandrel, double collet is realized simultaneously the outwards motion of (interior) like this, realizes the single-axis bidirectional of sample is stretched.Pulling force sensor 6 is connected with chuck 4.The in-situ acquisition of realization to pulling force in the sample drawing process.
Fig. 2 be described in the utility model be under 0.6 μ m/s at draw speed, the stress-strain diagram in stretching isotactic polypropylene process;
Fig. 3 be described in the utility model be under 10 μ m/s at draw speed, the stress-strain diagram in stretching natural rubber process;
Fig. 4 be described in the utility model be the differently strained polypropylene 998cm that detects when being used in conjunction with synchrotron radiation infrared microscopy line station under 0.3 μ m/s at draw speed
-1The degree of orientation changes, and wherein, Fig. 4 (a), Fig. 4 (b), Fig. 4 (c) are amorphous distribution of orientations figure under 0%, 35% and 120% at macro-strain respectively.
Experiment embodiment one: near natural rubber crystallinity breach in drawing process that the research of synchrotron radiation infrared microscopy contains breach distributes.
(1) according to different experiment demands, select different motors, the utility model is narrated stretching device and is adopted interchangeable motor, hope can satisfy the demand that mechanical strength intensity differs larger material extending.Low power motor (rated power 2W) is adopted in this experiment, also is furnished with in addition the motor of the wide range of 8W, mainly for the larger glassy polymer material extending of yield modulus.Consider the replacing problem of motor during due to design, so change very convenient.
(2) with computer, stretching device and switch board serial ports connect: the connecting line in power system 1 and the connecting line in pulling force sensor are connected with switch board respectively.Utilize the USB line that data collecting card is connected with host computer, realize the in-situ acquisition of data; Utilize USB to turn 232 lines computer and switch board coupled together, realize host computer to motor in the control of electric machine rotation and electric machine rotation process to the real-time feedback of computer.After treating that all connecting line connections are completed, open host computer, open the switch board power supply.According to the spacing of testing between the size adjustment chuck that needs.Minimum spacing between two chucks is 0, and between the restriction chuck, the principal element of distance is the size of Different Light hot spot and the strain that we need to realize.
(3) sample (natural rubber) is processed into size and is the rectangular-shaped batten of 15mm * 3mm * 0.18mm, and the centre of sample is prepared and is about on Width is the breach of 600 microns, subsequently its two ends are individually fixed in two chuck places, between two chucks, initial distance is 3mm.Batten need to guarantee that batten only has stretching action power in drawing process perpendicular to chuck in the process of placing sample, is not subject to shear force.Screw the screw between chuck, guarantee that sample slippage can not occur in drawing process.Start subsequently stretching device, setting draw speed is 10 μ m/s, and stretching displacement is 9000 μ m(strains 3), when its actual stretching displacement reached 9mm, this stretching device can automatically stop stretching and maintain this position.
(4) after sample stretches and stops, stretching device is placed in above the infrared Bruker IFS 66v infrared spectrometer with the far-infrared experiment station of NSRL, open spectrometer, adjust infrared light path, make the infrared light spot position just on the surface of our sample.Because Bruker IFS 66v infrared spectrometer spot size is 250 μ m * 250 μ m, and actual breach size is in mm * mm magnitude, so we need to gather multi-group data, subsequently these data is spliced into the complete zone that contains breach.
Fig. 6 is to be 10 μ m/s at draw speed, and strain is near the testing result of the crystalline portion content 3 o'clock corresponding breach, has that in figure, we can see significantly that the crystalline content of natural rubber presents the waveform decay near breach.
Experimental result shows: stretching device described in the utility model is tensile strain and the strain rate of Quality control accurately, and can provide the variation of pulling force in whole drawing process, can realize the be stretched difference of sample inner zones of different structure after stretching stops of in-situ observation when being used in conjunction with other checkout equipments are supporting, have good practicality.
Experiment embodiment two: the degree of orientation of the thin neck extended area of synchrotron radiation infrared microscopy research uniaxial tension isotactic polypropylene distributes.
(1) according to different experiment demands, select different motors, stretching device described in the utility model adopts interchangeable motor, and hope can be satisfied the demand that mechanical strength intensity differs larger material extending.Low power motor (rated power 2W) is adopted in this experiment, also is furnished with in addition the motor of the wide range of 8W, mainly for the larger glassy polymer material extending of yield modulus.Consider the replacing problem of motor during due to design, so change very convenient.
(2) with computer, stretching device and switch board serial ports connect: the connecting line in power system 1 and the connecting line in pulling force sensor are connected with switch board.Utilize the USB line that data collecting card is connected with computer, realize the in-situ acquisition of data; Adopt USB to turn 232 lines computer and switch board coupled together, realize host computer to motor in the control of electric machine rotation and electric machine rotation process to the real-time feedback of computer.After treating that all connecting line connections are completed, open host computer, open the switch board power supply.According to the spacing of testing between the size adjustment chuck that needs.Minimum spacing between two chucks is 0, and between the restriction chuck, the principal element of distance is the size of hot spot and the strain that we need to realize.
(3) sample (isotactic polypropylene) is processed into the big or small 20mm * 1.86mm * 76 rectangular-shaped battens of μ m that are, between two chucks, initial distance is 2.44mm.Batten need to guarantee that batten only has stretching action power in drawing process perpendicular to chuck in the process of placing sample, is not subject to shear force.Screw the screw between chuck, guarantee that sample slippage can not occur in drawing process.Start subsequently stretching device, setting draw speed is 0.6 μ m/s.
(4) miniature stretching device is placed in above the infrared Bruker IFS 66v infrared spectrometer with the far-infrared experiment station of NSRL, opens spectrometer, adjust infrared light path, make the infrared light spot position just on the surface of our sample.Because Bruker IFS 66v spectrometer spot size is 250 μ m * 250 μ m, therefore should select thin neck to expand the edge in the stretching experiment process, make the thin neck extended area of the district inclusion that collects and thin neck region.Fig. 6 (a) is the engineering stress strain curve of rate of extension isotactic polypropylene when being 0.6 μ m/s, and Fig. 6 (b) is the infrared microscopy picture of thin neck extended area in drawing process, and Fig. 6 (c) is the 998cm that utilizes of corresponding region
-1The degree of orientation information of mark has in figure us can see significantly that the degree of orientation is increasing until reach platform rapidly after entering thin neck region.
Experimental result shows: the utility model is tensile strain and the strain rate of Quality control accurately, and can and provide the variation of pulling force in whole drawing process, can observe the sample difference of inner zones of different structure during the course that is stretched by real-time in-situ when being used in conjunction with other checkout equipments are supporting, have good practicality.
Claims (3)
1. a high molecular film material stretching device that is used for the original position structure detection, is characterized in that: comprise the high-precision servo motor, epicyclic gearbox, scrambler, driver, pulling force sensor, data collecting card, the LabVIEW software control system of system integration, wherein:
This device adopts the high-precision servo motor as the power system of rotating;
It is integrated that this device has adopted LabVIEW software programming high-precision servo electric machine control system that the mechanics of pulling force sensor and stretching displacement real-time data acquisition and draw speed have been carried out, and can carry out synchro control and data acquisition;
By rotating with the reverse screw mandrel of motor-driven, the slide block that moves through above guide rail with screw mandrel is delivered to above chuck this device subsequently at drawing process, realizes that single-axis bidirectional stretches.
2. the high molecular film material stretching device for the original position structure detection as claimed in claim 1, it is characterized in that, when material is controlled in the to-and-fro movement of stretching or resilience, system can high-precision displacement, the control of speed and pulling force and the collection of data can be adjusted into the constant force stretching device with constant force output under the requirement of correspondence.
3. the high molecular film material stretching device for the original position structure detection as claimed in claim 1, is characterized in that, this device is restrained stretching speed and stretching range accurately, and wherein, minimum-rate is 0.3 μ m/s, maximum stretching range 40mm.
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| CN 201220627425 CN202928905U (en) | 2012-11-12 | 2012-11-23 | Polymer film material stretching device for in-situ structure detection |
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| CN 201220627425 CN202928905U (en) | 2012-11-12 | 2012-11-23 | Polymer film material stretching device for in-situ structure detection |
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| CN2012104804262A Pending CN103018120A (en) | 2012-11-12 | 2012-11-23 | Device and experimental method for in-situ structure detection of high-polymer film material stretching |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103018120A (en) * | 2012-11-12 | 2013-04-03 | 中国科学技术大学 | Device and experimental method for in-situ structure detection of high-polymer film material stretching |
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| CN103226091A (en) * | 2013-04-12 | 2013-07-31 | 中国石油天然气集团公司 | High temperature high pressure acoustic emission electrochemistry simulation experiment apparatus capable of loading stress |
| CN103789855B (en) * | 2013-09-25 | 2016-01-06 | 北京服装学院 | Utilize the melt spinning method that X-ray on-line synchronous detects |
| CN104132853A (en) * | 2014-08-07 | 2014-11-05 | 中国科学技术大学 | Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof |
| CN110333134A (en) * | 2019-07-04 | 2019-10-15 | 西北工业大学 | Uniaxial stretching device and experimental method associated with a kind of and neutron scattering |
| CN110186767A (en) * | 2019-07-12 | 2019-08-30 | 中国科学技术大学 | A kind of characterization apparatus of high molecular material |
| CN110806407A (en) * | 2019-11-04 | 2020-02-18 | 南京工业大学 | Labview-based two-dimensional material scanning and vision processing system and method |
| CN111610097B (en) * | 2020-06-11 | 2022-02-08 | 四川大学 | Polymer material four-way or two-way tensile test equipment |
| CN111766147B (en) * | 2020-07-08 | 2023-08-01 | 中国科学院上海高等研究院 | Temperature control micro-stretching device for synchrotron radiation infrared station |
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| SU1244542A1 (en) * | 1984-12-10 | 1986-07-15 | Предприятие П/Я В-2431 | Machine for testing specimens in extension |
| CN201237567Y (en) * | 2008-08-01 | 2009-05-13 | 中国科学技术大学 | Material stretching and compressing device used for multi-light source in-situ structure detection |
| CN202928905U (en) * | 2012-11-12 | 2013-05-08 | 中国科学技术大学 | Polymer film material stretching device for in-situ structure detection |
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Granted publication date: 20130508 Termination date: 20151123 |