SU500745A3 - The method of obtaining carbon-fiber reinforced materials - Google Patents

Description

(54) PREPARATION OF REINFORCED CONTRIBUTORS

FIBER MATHEH ALOV L: j. ,,:, u, ..iua, 4., YAN aapuMiUSHKSi -: e;:.; Was; p8dsg: zen} Yu kz fiber,:; i; | -c 1 .; agalliro-ean1U-0, 1 - I; ,, JI - -, -Sh tI, with iC (tI, h, - -. To aueTOfO if n Te4eifiiHe1.7 hour for 5Е at each time there is an excess of copolymer CMA. Athenh in cotton for 5 hours C G After this crap. The SCC can be used to reduce the amount of microelement microorganism to the degree of penetration | graft weight (noisis epa aa SHO gf fibers), iia; rstv log-55got in tzchen: gge mvn vo .:;; EH in no. g rasgzore; O, I;: 7 (: rLa i :: v; r cj,.; o) ii.:i on I; ) ,, mbeeyo / yzgayut aolskk: and to enter ies in polk3fyrN ;; Yu resin; containing 8 wt% kata, 15z-yto ::;:. 1, 3t; vef, i go to a young KpsiciCBaiiSiSO’s newcomer, before the alternative: zl.yo 5sh ;; fb; with that layer of fto | ayerzhash.e golly lera :, it: stavleet hardened with leakage 2., By; c; cured sample | 1, x2xx / CI mm), ededrrrx55 weight,% of fibers, wasted and removed. Measurements of conductor-1T

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Q jTKDOr i,, ... "..., ..., ,,,,.,", -, .. half-hour 6 hours. Defined, ii: pEn; s, oiznBky l, r r;,; - |,.; E |; j;, rV7 Г ,, fOV & K US ,, „, ... ,,,, - ,, 3, example 3, the polymer is fixed on ЕО .. o o; ijiii-:; - ro gükrmstal --.....,, m; 34- U: - ghrs5l pre-oxidized -... - leads to sludge in the presence of an hour- ----- -i - - -, - .. -...,. of the controllable concomitant / gkierra dik -: T; 1rg to an: cdrndnyk bridges and surroundings, carboxyl x functions Example S, Carbon fiber om1; about 1 som: ichenye 1G spzi r -core copolymer of CTC 0.5OOgrol - maleic anhydride of CMA in acetone, 5O cisr-c / pcrDepem 5% of distilled water / 3 i-1.1 g with it jiJiKjij (. (.. l rastBo ;-) ntel), Za1iid () | 1d 12,8 ffiOGkPl-; fibers 1) (0mno: 1ot and aucTOHt in ts-cg- i - Maloinoy d and hydride 12.8 g -ii-Ojikfetura IO J; duration .CiCHs .vDHj-hOii svnzoo jKns. by the sociococio ::; by air prn 450 ° C to degree Jii:,: 5 4D8%, then immerse them in that time for 20 minutes and then sit in air. Then go to epoxy resin. Production characteristics Epoxy resin 10 g Hardener 0.25 g Press pressure Temperature S 1CLAIME 5v DONATION sj hour To AnatvjOBisf in amateur form; loedvaryte flax covered with this f-gors) lego gulyy5h «er; Zolokniy G adEyryTel but; ; nponHTb 3aK # r for DA 4: ni Gris 8 {HS, ras1orom civtoKbs (8 g cv.Oirt is 2 g of acetone). After sebechohayzan dfavnek fiber yp ..;. Ash t: Emo prk: Technical conditions. According to gchenna ermirovs .; COLLEGE (1x2x70 MM) J with holding 75 weight,% FIBER; is subjected to a C-heb on the jaag shift in accordance with the conditions of the sport; Open-in-time 1. UstaBlennay: the load is discharged. shift (average value by 20 measurements 6.2 kg / cm, Soprotye to a shift, and teddy Neo 12O H3Mepew5-j; 5j, ko-kozptsii epogssid s V Kobobogakaknye Eolokie, co-ordinates 5,6 J 0,3 K ., / EfS., In the examples, fxxchue is a limer n fiber-ionic bond, such as digppnoy. It is processed to turn, ... basic to < RTI ID = 10.1 > and in contact with sopola lero G; slashgkashi kyrboks1; lnye funktsiNz also processed or fully or partially. Example 4. Fibers ,, (lggyngenkie air at 450 C to stekaki coconut 4.8% e, processing they are treated with OD n caustic soda at boiling for 8 hours AFTER mixing with acetone and vacuum s / ni at 5 ° C. They are immersed and for 24 hours in a pftCTSop copolymer of styrene-small-scale; CMA hydrate in acetone (i g-wave I g acetone ), pre-polkostio s-processed with 0.1N caustic soda in the phenolphthalein substrate.After npoNibiBKH for 2 minutes of two acetone baths and vacuum me drying at 5 ° C, they are introduced into the epoxy main component according to applicator 3 , The average value for 10 measurements of breaking load on shear {S) of compositions based on these treated fibers is 6.3 kg / cm. Example 5. Instead of complete treatment of the anhydride groups, one anhydride group can be treated in two in the chain of the stypro-r. Pein-anhydride copolymer. In this example, different polymers are used. The latter can differ in their capacity: bridges from the method of their total characteristic viscosity to the percentage content of the functions of the anhydride. Inherent viscosity Solvent methyl ethyl ketone Temperature 25 ° C mss 4 t - in seconds; " WITH . - in grams of polymer 1OO cm of methyl ethyl ketone. The percentage of anhydride functions is given by the volume O, 1 n. One soda, necessary for complete: o6pa6t7rKH 1 g of polkmer in solution in acetone, fiber, oxidized carbon at 5 ° C for 5 h, is treated with reverse; that a refrigerator 0.1 n. Dime soda for 8 hours. The fibers are then immersed for 0 min in a solution of CMA in acetone, (about g with olimer / g of acetone), partially processed (one anhydride group into two), with 1N sodium hydroxide. After washing b those. An air cushion of 20 min. and drying in air at 25 ° C. These fibers are introduced in an amount of 75 wt. % epoxy resin and then determine the breaking load on the shear obtained. rmirovannyh compositions (1x2x7O mm). The test results are given in Ab.1. 75 weight. % into a polyimide resin with the following molding conditions. Fibers, pre-impregnated with polyimide: oh, the resin will be placed in a form, pre-coated with a layer of fluorine-containing polymer, heated to 15O C. For 3 hours, the form is gradually adjusted from 8O to 1, the reinforced composition is subjected to pressure from 1 to 2 kg / cm, simultaneously heating her in an argon atmosphere for 2 hours before. Then annealing is carried out for 20 hours from 150 to 340 ° C. The shear loads (in KG / 1IM) of the obtained army compositions (1x2x70 mm) are as follows: polyimide resin + untreated fibers 3.0 polyimide grams grafted locks6.5 Example 7, Grafting to pre-oxidized fibers AC A copolymer CM No. 2 according to the method example 5, increase the yield of iipoHHfXTb epoxy resin; reinforced ltnm type polokon. 11zg, {erg: pi elasticity

8 T a 6 l and u a 1 Example 8. Instead of styrene-malenous anhydride copolymer, polyethylene-maleic anhydride (EMA) is grafted with an ionic bond of a dipole type. These linear copolymers can differ in the number of anhydride functions determined by M in Example 5. Fibers pre-oxidized with ozone air at 70 ° C for 5 hours and treated with 0.1 and. caustic soda with reflux for 8 hours, brought into contact with a solution of an eMA copolymer in acetone (5 g EMA / / 1 g acetone), previously partially treated with O, 1N. caustic soda (one anhydride group into two). The test results are shown in Table. 2.. The copolymers of CMA and EMA can be modified to screw on to the fibers of the partial esterification of anhydride func tions by aliphatic alcohols (C „–C). li “dU which give this way more flexibility to the grafted branches of m.

9

Epoxide-4-Oxidized Fiber (0.3)

In examples 9 and 10, the polymer is fixed by ion-bonding, such as pox-bonding, using two- or three-fold ketonic fibers.

Example 9. Carbon fibers puffed out of a pitch, pre-oxidized with air at 45 ° C, to a degree of wear of 2%. 1.2 g of pre-oxidized fibers are refluxed with an aqueous solution of calcium acetate in a tag for 7 hours. Water (half) is then distilled to capture the formed CH 3 COOH. The fibers extracted from the reaction mixture are dried under vacuum at 250 ° C and brought to a T7 contact with CMA No. 1 solution (5 g of co-polymer / 1 g of acetone). After washing with acetone (2O minutes), they are injected according to rspfiMGpy 1 into the epoxy resin. The breaking load on the shear reinforced composite materials is 63 Io, 4 kg / mm (average BV / magnitude obtained in 5 dimensions).

Example 10, Polyvinyl-4-pyridium

A solution in a mixture of acetone / methanol (0.5 g of copolymer / il g of solvent) is introduced into 5–; contact for 8 hours with 0.75 g of pitch fibers, previously oxidized with air at 45 ° C (wear 2%). After flushing with acetone / methanol fiber

table 2

6.1 +0.4

20

injected into the polyester resin according to measure I.,

. A mixture of polyester + treated pitch fibers is 3.5 kg / mm, and blends of polyester untreated pitch fibers — 3.1 kg / mm.

Claims (1)

Invention Formula The method of obtaining ap n carbon fiber-bonded materials by displacing carbon fibers with a thermosetting binder selected from the group consisting of polyester, epoxy polyimide binder, and subsequent shaping, characterized in that, in order to increase the shear strength of carbon materials the fibers are pretreated with nomiMepONi or a copolymer selected from the group containing -. polyvinylpyrndine copolymer, vinyl acetate vinyl chloride, copolymer of stzgrol-maleic anhydride, copolymer of methyl methacrylate-maleic anhydride and copolymer of polyethylene-maleic anhydride, capable of chemically bonding with carbon fiber and binder.