PVC dzakapedzwa zvigadzirwa zvinoshandiswa mumaindasitiri akasiyana. Kuongororwa uye kuyedzwa kwePVC calcium zinc stabilizer inoda nzira dzakasiyana zvichienderana nekuita kwavo. Kazhinji, kune nzira mbiri huru: static uye dynamic. Iyo static nzira inosanganisira Congo tsvuku bvunzo bepa nzira, kuchembera ovheni bvunzo, uye electromotive simba nzira, nepo ine simba nzira inosanganisira torque rheometer bvunzo uye ine simba kaviri roll bvunzo.
1. Congo Red Test Paper Method
Uchishandisa bhati yemafuta ne-built-in glycerol, iyo PVC inofanirwa kuongororwa inosanganiswa zvakaenzana neyakagadzikana yekupisa uye inoiswa mudiki test tube. Nyaya yacho inozununguswa zvishoma kuti isimbise, uye yozoiswa mubhati remafuta. Tembiricha yeglycerol muPVC calcium zinc stabilizer oil bath inogadzikwa pachine nguva kusvika 170 ℃, kuitira kuti nzvimbo yepamusoro yePVC zvinhu muchubhu diki yekuyedza ienzane nepamusoro peglycerol. Pamusoro pechubhu diki yekuyedza, plug ine girazi rakatetepa chubhu inoiswa, uye chubhu yegirazi inopenya kubva kumusoro kusvika pasi. Bepa rekuongorora dzvuku reCongo rinokungurutswa roiswa pazasi pechubhu yegirazi, kuitira kuti mupendero wepazasi weCongo red test bepa unenge masendimita kubva kumucheto wepamusoro wePVC zvinhu. Mushure mekunge kuyedza kwatanga, nyora nguva kubva pakaiswa tambo tsvuku yeCongo muchubhu yekuyedza kusvika painoshanduka kuva bhuruu, inova nguva yekudzikama kwemafuta. Dzidziso huru yekuedza uku ndeyokuti PVC ichakurumidza kuora pakupisa kunosvika 170 ℃, asi nekuda kwekuwedzera kwekusimbisa kupisa, kuora kwayo kunodzivirirwa. Nokufamba kwenguva, iyo stabilizer inopisa ichapedzwa. Kana kushandiswa kwapera, PVC inokurumidza kuora uye kuburitsa HCl gasi. Panguva ino, iyo Congo tsvuku reagent mu test tube ichachinja ruvara nekuda kwekuita kwayo nyore neHCl. Nyora nguva panguva ino uye kutonga kushanda kwekupisa kwekudzikamisa zvichienderana nehurefu hwenguva.
2. Static oven test
Gadzirira masampuli akasanganiswa epamusoro-soro ePVC poda uye zvimwe zviyamuro zvekugadzirisa (zvakadai semafuta, magadzirirwo emagetsi, mafirita, nezvimwewo) kuwedzera kune PVC calcium zinc stabilizers. Tora humwe huwandu hwemuenzaniso uri pamusoro, wedzera zvakasiyana-siyana zvekupisa kuPVC calcium zinc stabilizer mune imwe chikamu, sanganisa zvakanaka, uye wobva wawedzera kune kaviri tsvimbo musanganiswa.
Kugadzirira kwezvimedu zvekuedza pamusanganisi kunowanzoitwa pasina kuwedzera mapurasitiki. Tembiricha yakapetwa kaviri inoiswa pa160-180 ℃, uye kana uchiwedzera mapurasitiki, tembiricha yemupumburu inowanzotenderedza 140 ℃. Nekudzokorodza kudzvanya netsvimbo mbiri, sampu yePVC yunifomu inowanikwa, inoteverwa nekucheka kuti uwane maPVC samples ehumwe saizi ine akasiyana kupisa stabilizer. Isa zvidimbu zvakasiyana zvePVC bvunzo pane yakagadziriswa mudziyo wobva wazviisa mutembiricha isingachinji (kazhinji 180 ℃) oveni. Rekodha shanduko yeruvara yezvimedu zvekuyedza maminetsi ega ega gumi kana maminetsi gumi nemashanu kusvika zvaita dema.
Kuburikidza nemiedzo yekuchembera muovheni, kushanda kwezvidziviriro zvekupisa paPVC kugadzikana kwekupisa kunogona kutsanangurwa, kunyanya kugona kwavo kudzvanya shanduko yeruvara. Zvinowanzotendwa kuti kana PVC ichipisa, ruvara ruchaita shanduko kubva kuchiedza kusvika kune rima, kusanganisira chena yero yebrown brown dema. Mamiriro ekuora anogona kutsanangurwa nemuvara wePVC pane imwe nguva yenguva.
3. Magetsi angangoita nzira (conductivity nzira)
Mudziyo wekuedza unonyanya kuve nezvikamu zvina. Rutivi rworudyi iinert gasi mudziyo, unowanzo shandisa nitrogen, asi dzimwe nguva zvakare mweya. Musiyano ndewekuti kana uchishandisa nitrogen kuchengetedza, PVC calcium zinc stabilizer inogona kudzivirira kuparara kwePVC amai maketani anokonzerwa neokisijeni oxidation mumhepo. Chiyero chekudziyisa mudziyo chinowanzo kugeza oiri kunosvika 180 ℃. Musanganiswa wePVC uye kupisa stabilizer inoiswa mukati mebhati remafuta. Kana HCl gasi inogadzirwa, inopinda mumhinduro yeNaOH kuruboshwe pamwe chete negasi inert. NaOH inokurumidza kutora HCl, zvichiita kuti pH kukosha kwemhinduro kuchinje. Nekurekodha shanduko yemamita pH nekufamba kwenguva, mhedzisiro yemhando dzakasiyana dzekupisa dzinogona kutsanangurwa. Mune mhinduro dzekuyedza, iyo pH t curve inowanikwa nekugadzirisa inokamurwa kuva induction nguva uye nguva yekukura, uye kureba kweiyo induction nguva inosiyana nekubudirira kwekudziya kwekudzikamisa.
4. Torque rheometer
Iyo torque rheometer ndeye yakajairwa diki-chiyero chiridzwa chinotevedzera chaiyo kugadzirisa kwePVC. Pane bhokisi rakavharwa rekugadzirisa kunze kwechiridzwa, uye kutonhora kwebhokisi rekugadzirisa uye kukurumidza kwemaviri emukati rollers kunogona kudzorwa kuburikidza nekombiyuta yakabatanidzwa kune chiridzwa. Huremu hwezvinhu hwakawedzerwa kune torque rheometer inowanzoita 60-80 g, iyo inosiyana zvichienderana nemhando dzakasiyana dzezviridzwa. Matanho ekuedza ndeaya anotevera: gadzirira masterbatch ine siyana kupisa stabilizer pachine, uye chinokosha masterbatch formula kazhinji zvinosanganisira ACR kuwedzera PVC CPE, CaCO3, TiO, Lubricants, etc. The torque rheometer akagadzirirwa tembiricha pachine. Kana yasvika kune yakatarwa tembiricha uye kumhanya kwakagadzikana, kuyerwa kusanganiswa kunowedzerwa kubhokisi rekugadzirisa, nekukurumidza kuvharwa, uye maparameter akasiyana pakombiyuta yakabatana anonyorwa, inova rheological curve. Mushure mekugadzirisa, maitiro akasiyana-siyana ekuonekwa kwezvinhu zvakasimudzwa anogonawo kuwanikwa, zvakadai sekuchena, kana akaumbwa, kutsetseka, nezvimwewo. Nokushandisa izvi zvigadziro, kukwanisa kwemaindasitiri kweiyo inoenderana kupisa stabilizer inogona kugadziriswa. Iyo yakakodzera kupisa inodzikamisa inofanirwa kuve neyakakodzera torque uye plasticization nguva, uye chigadzirwa chinofanira kuumbwa zvakanaka nekuchena kwepamusoro uye nzvimbo yakatsetseka. Iyo torque rheometer yakavaka zambuko riri nyore pakati pekutsvagisa marabhoritari uye indasitiri yakakura-yakakura kugadzirwa.
5. Dynamic double roll test
Semhando yenzira yekubatsira yekuyera zvine simba mhedzisiro yezvitsigiso zvekupisa, dynamic rollers maviri anoshandiswa kana pasina rheometer, uye kaviri roller piritsi yekutsikirira chiridzwa chinosarudzwa mukuyedza. Isa poda yakasanganiswa yakakwira-kumhanya mukati mayo uye woidzvanya kuita chimiro. Dzokorora wedzera sampuli yakawanikwa. Kusvikira chidimbu chebvunzo chashanduka chitema, rekodha nguva yainotora kuti iite dema, iyo inonzi nguva yekusviba. Kuti uone kugadzikana kwekushisa kwemhando dzakasiyana dzekupisa paPVC nekuenzanisa nguva yekudzima.
Nguva yekutumira: Jun-20-2024
