Polyvinyl doro

Polyvinyl doro ndiro polymer inoshandiswa iyo inopera nyore nyore mumvura. Yakawanikwa muna 1924 nemaviri emakemikari - Gonel naHerman - vachishandisa saponification reaction.

Physical properties

Polyvinyl doro ishavha yakachena ine simba rokuumba firimu. Izvi zvinowedzera simba uye zvinogadziriswa, asi sezvo unhu hunoenderana nemvura (iyo inotora mvura), simba rinopera rinoderera, uye pane imwe nzvimbo yehutu, hupulasi hukuru hunooneka. Iine hutachiona hwezvinhu, inopera nyore nyore (kunyanya mumvura). Muzvinhu zvinokonzerwa nemafuta zvakadai samafuta nemafuta, haikwanise kuparadza. Kana yakashandiswa, chinhu ichi hachina chekuvadza, izvo zvinoreva kuti inogona kuonekwa seisina maturo.

Kuwana doro

Polyvinyl doro kana PVA inowanikwa kubva ku polyvinyl acetate ne hydrolysis kana alcoholholysis uye inobudiswa nenzira yegranules kana pfupfu. Paunogamuchira PVS, nzira dzakasiyana-siyana dzevekombiki dzinoshandiswa, kubva pane nyore kusvika zvakaoma kunzwisisa uye nguva inopedza.

Polyvinyl doro - kushanda

PVS inowanzoshandiswa nhasi. Inogona kutora chikamu chekudzivirira mukati mekugadzira glue uye shampoos, nekubatsira kwayo kubudisa latex zvinhu. Iyo inoshandiswa zvinobudirira nevanodzorera kuti vadzose mapikicha emifananidzo. Nokuda kwehuwandu hwayo, yakawana kushandiswa kwakawanda pakusikwa kwezvinhu zvakachena. Mhando dzose dzemapuranga, matamponi uye gaskets zvinogadzirwa nekubatsira kwePVS. Usakanganwa polyvinyl doro uye varimi vezvokudya. Iyo inoshandiswa seomulsifier yekugadzirwa kwe mayonnaise, sauces, ketchup uye zvimwe zvekudya zvekudya, uye inoshandiswawo sekumutsigira kwekunakidzwa kwekudya.

Mishonga yemazuva ano yakagamuchirawo dzimwe nzvimbo dzePVS. Inoshandiswa mukugadzira kwemimwe mishonga, ichiisa pasi pakuchenesa zvakakwana kusvibiswa. Ophthalmologists vanoshandisa polyvinyl doro kuti vagadzirire madonhwe eziso uye sechinhu chinogadziriswa chengano. Kunyangwe oncologists vakawana kushandiswa kwePVS mukurapa kenza. Kunyanya, zvakakosha pakuita nzira isiri yekuvhiya yekugadzira. Uye iyi haisi iyo yose ye polyvinyl doro mumishonga.

Muchigadzirwa chemagetsi, PVA inoshandiswa kubvisa static magetsi, uye mumashizha emapepa ekudzokororazve mapepa emarara. Mukuwedzera, icho chinhu chinonyanya kukosha mukugadzirwa kwemasimbi. Polyvinyl doro inofanirwa kune vavaki uye metallurgists, tanners uye vanogadzira pende uye michero yevarnish. Zvose zvinokonzera michina yakashandiswa inoshandiswa pakugadzirwa kwayo PVA, iyo inovapa simba kuburikidza nekugadzirwa kwemazinga emucheka.

Kunyangwe sainzi yakadaro se microbiology yakatanga kushandisa PVA mukugadzirisa kwemaitiro nemasero. Polyvinyl doro rakashandiswawo pakudhinda, kunyanya, mukunyora kwechirasi. Munharaunda iyi inoshandiswa sepolymmer imwechete yekunyora. Inogonawo kushandiswa sekuvhara kana zvinhu zvinodzivirira munzvimbo yebasa kuti zvivhare zvikamu, zvichienderana nechokwadi chokuti PVA yakatorwa nyore nyore.

Makambani anoshandura uye anoshandisa zvipfeko anoshandisa iyi polymer kubudirira. Nhasi, PVS iri kuwedzera kupararira mune zvehupfumi hwenyika. Inogona kutengesa, nyore kutakurwa (kazhinji mumapuranga epurasitiki akaiswa mumapuranga emapuranga) muchitfambiso chakavhara kuti usanyorova. Sezvo polyvinyl doro ichipisa, zvinodiwa kutevera mitemo yekuchengetedza pakuchengeta nekuraira / kuchidzikinura.