CN101544772A - Method for strengthening MAA/AN copolymer foam plastic - Google Patents
Method for strengthening MAA/AN copolymer foam plastic Download PDFInfo
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- CN101544772A CN101544772A CN200910022401A CN200910022401A CN101544772A CN 101544772 A CN101544772 A CN 101544772A CN 200910022401 A CN200910022401 A CN 200910022401A CN 200910022401 A CN200910022401 A CN 200910022401A CN 101544772 A CN101544772 A CN 101544772A
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Abstract
The invention discloses a method for strengthening MAA/AN copolymer foam plastic, comprising the steps as follows: through holes with the diameter of 1-2mm are drilled on the MAA/AN copolymer foam plastic at the interval of 4-8 mm, wherein the included angle between the drilled through holes and the plane of the MAA/AN copolymer foam plastic is 90 degrees or 45 degrees; unidirectional fiber bundles with the same diameter as that of the through holes are inserted in the through holes and cured at the temperature of 0-120 DEG C for 2-48h. Inserted with the unidirectional fiber bundles, the treated MAA/AN copolymer foam plastic is increased in the compression strength from 0.8-1.7MPa of the prior art to 3.2-4.8MPa, the compression modulus from 32-56MPa of the prior art to 180-400MPa, and the shearing strength from 0.8-1.3MPa of the prior art to 1.2-1.5MPa.
Description
Technical field
The present invention relates to a kind of method that strengthens porous plastics, be specially the method that strengthens the MAA/AN copolymer foam plastic.
Background technology
In the structure design of polymer matrix composites, the sandwich structure matrix material combines the high strength of aluminium alloy, glass fiber compound material, carbon-fibre composite panel and the low density and the high rigidity of high-modulus and sandwich material, forms a kind of typical lightweight, high strength, high-modulus structural composite material.The sandwich structure matrix material has very, and important use is worth in fields such as aircraft, rocket, wind electricity blade, yacht, medicine equipment, sports goodss.In actual applications, the panel of sandwich structure matrix material mainly bears the stress of stretching, compression, and core mainly bears horizontal shear-stress and longitudinal compressive stress, under the individual cases, also bears horizontal compression stress.
High performance sandwich structure matrix material requires its sandwich material to have excellent compression performance and cutting performance, these core materials mainly contain cores such as aluminium honeycomb, NOMEX honeycomb, Barcelona wood, Polymethacrylimide (PMI) porous plastics, cross-linked polrvinyl chloride (XPVC) porous plastics, the contour performance structural foam of MAA/AN copolymer foam plastic.Comparatively speaking, under equal density conditions, wooden and high performance structures porous plastics has higher vertical compression performance and lateral shear performance to comb core than Barcelona.But the comb core price general charged is much higher than Barcelona reel material and unicellular foamed plastic cores; Comb core moulding curved surface sandwich structure composite property descends obviously; Comb core honeybee checkerwork cell size is big, and the resin absorbed dose is bigger during moulding sandwich structure matrix material, and honeybee checkerwork cell the center panel depression, resin dry spot take place easily, and suction easily after its sandwich structure breakage.
Document 3 " patent No. is the Chinese patent of ZL200610058849.X " discloses a kind of glass fibre enhanced urethane/polycyanurate porous plastics, this porous plastics is in starting material mixing process, adding is as the continuous glass fibre of wild phase, and foaming obtains continuous glass fibre enhanced urethane/polycyanurate porous plastics then.But should strengthen in the porous plastics, glass fibre is a chaotic, is not orientated on some direction.
Summary of the invention
In order further to improve the mechanical property of MAA/AN copolymer foam plastic, the invention provides a kind of method of the MAA/AN of enhancing copolymer foam plastic, adopt the continuous tow enhancing high-performance MAA/AN copolymer foam plastic of orientation fully, can increase substantially the mechanical property of MAA/AN copolymer foam plastic.
The technical solution adopted for the present invention to solve the technical problems: a kind of method that strengthens the MAA/AN copolymer foam plastic is characterized in comprising the steps:
(a) on MAA/AN copolymer foam plastic plate, be drilled with penetrating aperture according to the design needs;
When mainly increasing compression performance, aperture and porous plastics board plane are 90 °; When mainly increasing cutting performance, aperture is 45 with the porous plastics board plane and intersects.
(b) penetrate the unidirectional fibre bundle;
Pull wire tractive mono-directional fibrous bundle penetrates in the aperture on the plastic foamboard; The unidirectional fibre bundle can be a carefully rod of the unidirectional fibre bundle matrix material that has cured of dried fibrous bundle, single line fibrous bundle prepreg or resin.Can lay panel cloth or cloth prepreg on MAA/AN copolymer foam plastic plate surface earlier, then fibrous bundle be penetrated panel and penetrate in the hole.
(c) inject adhering resin;
The unidirectional fibre bundle is when not having the dried fibrous bundle of resin, adopts vacuum assisted resin infusion (VARI) technology or resin transfer moulding (RTM) technology that low viscosity resin is injected in the unidirectional fibre bundle that penetrates in the MAA/AN copolymer foam plastic.
(d) adhering resin solidifies, and realizes unidirectional fibre bundle and MAA/AN copolymer foam plastic and panel strong bond.
The invention has the beneficial effects as follows: owing in the MAA/AN copolymer foam plastic, pass through puncture unidirectional fibre bundle, the MAA/AN copolymer foam plastic after the processing, its compressive strength is brought up to 3.2～4.8MPa by 0.8～1.7MPa of prior art; Modulus of compression is brought up to 180～400MPa by 32～56MPa of prior art; Shearing resistance is brought up to 1.2～1.46MPa by 0.8～1.3MPa of prior art.
Below in conjunction with drawings and Examples the present invention is elaborated.
Description of drawings
Fig. 1 is the synoptic diagram of the inventive method embodiment 1 unidirectional fibre bundle 90 ° of punctures enhancing MAA/AN copolymer foam plastic.
Fig. 2 is the synoptic diagram of the inventive method embodiment 4 unidirectional fibre bundles 45 ° of punctures enhancing MAA/AN copolymer foam plastic.
Fig. 3 is the compressive stress strain curve that the inventive method embodiment 1 strengthens back MAA/AN copolymer foam plastic.
Fig. 4 is the shear-stress strain curve that the inventive method embodiment 4 strengthens back MAA/AN copolymer foam plastic.
Embodiment
Embodiment 1, is 54kg/m in density
3, thickness is to be the penetrating aperture of 1mm with 4mm for the spacing drill diameter on the MAA/AN copolymer foam plastic of 25mm, the aperture that bores and MAA/AN copolymer foam plastic plane be 90 ° of angles.
The traction of employing pull wire, penetrating diameter is that 1mm, linear density are the unidirectional preimpregnation carbon fiber bundle of 10.2mg/cm.
Polish behind 120 ℃ of curing 2h and expose the fibrous bundle termination, obtaining apparent density is 75kg/m
3Fibrous bundle puncture strengthen the MAA/AN copolymer foam plastic.
The traction of employing pull wire, penetrating diameter is that 1.5mm, linear density are the unidirectional preimpregnation carbon fiber bundle of 23mg/cm.
Polish behind 120 ℃ of curing 2h and expose the fibrous bundle termination.Obtaining apparent density is 75kg/m
3Fibrous bundle puncture strengthen the MAA/AN copolymer foam plastic.
Embodiment 3, are 54kg/m in density
3, thickness is to be the penetrating aperture of 1.5mm with 6mm for the spacing drill diameter on the MAA/AN copolymer foam plastic of 25mm, the aperture that bores and MAA/AN copolymer foam plastic plane be 90 ° of angles.
At the upper and lower surperficial laying depth of the MAA/AN copolymer foam plastic glasscloth that is 1mm as panel; Adopt the pull wire traction then, the dried carbon fiber bundle and the fibrous bundle termination that penetrate 1.5mm penetrate in the Watch glass cloth.
Adopting the VARI method is that 0535 low viscosity epoxy resin is injected in the aperture of the MAA/AN copolymer foam plastic that penetrates the unidirectional fibre bundle with the trade mark, and 20 ℃ solidify to polish behind the 48h and expose the fibrous bundle termination, and obtaining apparent density is 75kg/m
3Fibrous bundle puncture strengthen the MAA/AN copolymer foam plastic.
Embodiment 4, are 54kg/m in density
3, thickness is to be the penetrating aperture of 1.5mm with 7mm for the spacing drill diameter on the MAA/AN copolymer foam plastic of 15mm, the aperture that bores and MAA/AN copolymer foam plastic plane be 45, first row's aperture left-hand tilts, second row's aperture dextrad tilts, the back by that analogy, the aperture left-hand tilts or the dextrad inclination during odd number row, and aperture dextrad tilts or the left-hand inclination during even rows.
At the upper and lower surperficial laying depth of the MAA/AN copolymer foam plastic glasscloth that is 1mm as panel; The traction of employing pull wire, penetrating diameter is that 1.5mm, linear density are the unidirectional preimpregnation carbon fiber bundle of 23mg/cm.
Polish behind 100 ℃ of curing 10h and expose the fibrous bundle termination, obtaining apparent density is 75kg/m
3Fibrous bundle puncture strengthen the MAA/AN copolymer foam plastic.
Embodiment 5, are 54kg/m in density
3, thickness is to be the penetrating aperture of 1.5mm with 5mm for the spacing drill diameter on the MAA/AN copolymer foam plastic of 15mm, the aperture that bores and MAA/AN copolymer foam plastic plane be 45, first row's aperture dextrad tilts, second row's aperture left-hand tilts, the back by that analogy, aperture dextrad tilts or the left-hand inclination during odd number row, and the aperture left-hand tilts or the dextrad inclination during even rows.
Employing pull wire traction, the dried carbon fiber bundle and the fibrous bundle termination that penetrate diameter and be 1.5mm penetrate in the Watch glass cloth.
Adopting the RTM method is that 0535 low viscosity epoxy resin is injected in the aperture of the MAA/AN copolymer foam plastic that penetrates the unidirectional fibre bundle with the trade mark, and 50 ℃ solidify to polish behind the 30h and expose the fibrous bundle termination.Obtaining apparent density is 75kg/m
3Fibrous bundle puncture strengthen the MAA/AN copolymer foam plastic.
Following table is the main mechanical property that strengthens the MAA/AN copolymer foam plastic through the puncture of unidirectional fibre bundle
Claims (3)
1, a kind of method that strengthens the MAA/AN copolymer foam plastic is characterized in that comprising the steps:
(a) on the MAA/AN copolymer foam plastic, be that spacing drills through aperture with 4～8mm, the aperture that bores and MAA/AN copolymer foam plastic plane be 90 ° of angles, perhaps be 45 and left-hand tilts and the dextrad inclination intersects with MAA/AN copolymer foam plastic plane;
Perhaps lay glasscloth as panel on the upper and lower surface of MAA/AN copolymer foam plastic;
(b) penetrate and the isodiametric unidirectional fibre bundle of described aperture, when the unidirectional fibre bundle is dried fibrous bundle or fibrous bundle prepreg, adopt the pull wire traction to penetrate in the aperture; The unidirectional fibre bundle is during through the thin rod of the fibrous bundle matrix material of resin solidification, smears sizing agent on the thin excellent surface of fibrous bundle matrix material, directly penetrates in the aperture then; When there was the glasscloth panel on the upper and lower surface of MAA/AN copolymer foam plastic, unidirectional fibre Shu Duantou penetrated in the glasscloth;
When (c) the unidirectional fibre bundle is dried fibrous bundle, adopt vacuum aided injection molding technique (VARI) or resin transfer molding (RTM) process (RTM) low viscosity resin to be injected in the aperture of the MAA/AN copolymer foam plastic that penetrates the unidirectional fibre bundle;
(d) after 20～120 ℃ of conditions are solidified 2～48h, polish and expose the fibrous bundle termination.
2, the method for enhancing MAA/AN copolymer foam plastic according to claim 1, it is characterized in that: described hole diameter is 1～2mm.
3, the method for enhancing MAA/AN copolymer foam plastic according to claim 1 is characterized in that: adopt adhering resin, will penetrate unidirectional fibre bundle and MAA/AN copolymer foam plastic and panel strong bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100224016A CN101544772B (en) | 2009-05-07 | 2009-05-07 | Method for strengthening MAA/AN copolymer foam plastic |
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| CN2009100224016A CN101544772B (en) | 2009-05-07 | 2009-05-07 | Method for strengthening MAA/AN copolymer foam plastic |
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| CN101544772A true CN101544772A (en) | 2009-09-30 |
| CN101544772B CN101544772B (en) | 2011-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585088A (en) * | 2012-01-14 | 2012-07-18 | 王少辉 | Fiber reinforced foam plastic and preparation method thereof |
| CN102794838A (en) * | 2012-08-03 | 2012-11-28 | 南京甬博数控科技有限公司 | Composite male mould of yacht casing and manufacturing method |
-
2009
- 2009-05-07 CN CN2009100224016A patent/CN101544772B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585088A (en) * | 2012-01-14 | 2012-07-18 | 王少辉 | Fiber reinforced foam plastic and preparation method thereof |
| CN102794838A (en) * | 2012-08-03 | 2012-11-28 | 南京甬博数控科技有限公司 | Composite male mould of yacht casing and manufacturing method |
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| CN101544772B (en) | 2011-06-15 |
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Owner name: WEIHAI WEISAI NEW MATERIAL SCIENCE + TECHNOLOGY CO Free format text: FORMER OWNER: NORTHWESTERN POLYTECHNICAL UNIVERSITY Effective date: 20140617 |
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Effective date of registration: 20140617 Address after: 264300 Shandong city of Rongcheng Province Shi Xiang Road Patentee after: Weihai Wei Sai novel material Science and Technology Ltd. Address before: 710072 Xi'an friendship West Road, Shaanxi, No. 127 Patentee before: Northwestern Polytechnical University |