Stearic acid, kana octadecanoic acid, molecular formula C18H36O2, inogadzirwa nehydrolysis yemafuta nemafuta uye inonyanya kushandiswa mukugadzirwa kwe stearates. Giramu rega rega rinonyungudutswa mu21ml ethanol, 5ml benzene, 2ml chloroform kana 6ml kabhoni tetrachloride. Ichena wakisi inoonekera yakasimba kana kuti yero zvishoma waxy yakasimba, inogona kuparadzirwa kuita hupfu, zvishoma nekunhuhwirira kwebhota. Parizvino, huwandu hukuru hwekugadzirwa kwemukati kwemabhizinesi e stearic acid hunotengeswa kubva kunze kwenyika mafuta emichindwe, hydrogenation muoiri yakaoma, uyezve hydrolysis distillation kugadzira stearic acid.
Stearic asidhi inoshandiswa zvakanyanya muzvizoro, mapurasitiki epurasitiki, mold release agents, stabilizers, surfactants, rubber vulcanisation accelerators, zvinodzinga mvura, polishing agents, sipo dzesimbi, metal mineral flotation agents, softeners, pharmaceuticals uye mamwe organic chemicals. Stearic acid inogona zvakare kushandiswa sechinhu chinonyungudutsa chemafuta-anonyungudika pigments, crayon inotsvedza agent, wax paper polishing agent, uye emulsifier yeglycerol stearate. Stearic acid inoshandiswawo zvakanyanya mukugadzirwa kwePVC pombi dzepurasitiki, mahwendefa, profiles uye mafirimu, uye inogadzirisa kupisa kwePVC ine lubricity yakanaka uye chiedza chakanaka uye kupisa kugadzikana.
Mono- kana polyol esters ye stearic acid inogona kushandiswa sezvizoro, kwete-ionic surfactants, plasticisers uye zvichingodaro. Yayo alkali simbi munyu inonyungudika mumvura uye chimwe chezvinhu zvikuru zvinoumba sipo, nepo mamwe simbi munyu anogona kushandiswa semvura inodzinga, lubricant, fungicides, pendi additives uye PVC stabilisers.
Basa re stearic acid mu polymeric zvinhu rinoratidzwa nekugona kwayo kuwedzera kugadzikana kwekupisa. Zvishandiso zvepolymer zvinokonzeresa kushatisa uye oxidation panguva yekupisa tembiricha, zvichikonzera kudzikira kwekuita. Kuwedzerwa kweiyo stearic acid kunogona kudzikamisa nzira iyi yekushatisa uye kuderedza kutsemuka kwemacheni emamorekuru, nekudaro kuwedzera hupenyu hwebasa rezvinhu. Izvi zvinonyanya kukosha mukugadzirwa kwezvinhu zvinodzivirira kutonhora zvakanyanya senge wire insulation uye zvikamu zvemotokari.
Stearic acid ine yakanakisa yekuzora zvivakwa semafuta. Mune polymer zvinhu, stearic acid inoderedza kupokana pakati pemacheni, ichibvumira kuti zvinhu zviyerere zviri nyore, nekudaro zvichivandudza kushanda kwemaitiro. Izvi zvinobatsira kwazvo pakugadzira maitiro senge jekiseni kuumba, extrusion uye calendering.
Stearic asidhi inoratidzira plasticiser mhedzisiro mune polymeric zvinhu, ichiwedzera kupfava uye kusagadzika kwezvinhu. Izvi zvinoita kuti zvinhu zvive nyore kuumba mumhando dzakasiyana-siyana, kusanganisira mafirimu, machubhu uye profiles. Iyo plasticising mhedzisiro ye stearic acid inowanzo shandiswa mukugadzirwa kwepurasitiki kurongedza, mabhegi epurasitiki uye midziyo yepurasitiki.
Zvigadzirwa zvepolymeric zvinowanzoita kunyura kwemvura, izvo zvinogona kukanganisa zvimiro zvavo uye kukonzera ngura. Kuwedzerwa kwe stearic acid kunonatsiridza kudzoreredzwa kwemvura kwezvinhu, zvichibvumira kuti irambe yakagadzikana munzvimbo dzakanyorova. Izvi zvakakosha zvakanyanya munzvimbo dzakadai sezvigadzirwa zvekunze, zvekuvaka uye dzimba dzemagetsi emidziyo.
Stearic acid inobatsira kudzikisa shanduko yeruvara yezvinhu zvepolymeric muUV uye nharaunda dzinopisa. Izvi zvakakosha mukugadzirwa kwezvinhu zvakagadzikana zvemavara senge mabhodhi ekunze, zvikamu zvemukati zvemotokari uye fenicha yekunze.
Stearic acid inoshanda senge anti-adhesive uye inoyerera rubatsiro mune polymeric zvinhu. Iyo inoderedza kunamatira pakati pemamorekuru uye inoita kuti zvinhu zvifambe zviri nyore, kunyanya panguva yekuumba jekiseni. Izvi zvinovandudza kubereka uye kuderedza kukanganisa muchigadzirwa.
Stearic asidhi inoshandiswa seanorwisa-caking agent mukugadzira fetireza yekomboni kuti ive nechokwadi chekupararira kwakafanana kwezvidimbu zvefetereza. Izvi zvinobatsira kuvandudza kunaka nekufanana kwefetereza uye zvinoita kuti zvirimwa zviwane kudya kwakafanira.
Stearic acid inoshandiswa mumhando dzakasiyana siyana dzemaindasitiri nevatengi.
Nguva yekutumira: Jun-05-2024
