Kuti kune rheological maitiro epolymer melt inonyatso zivikanwa muextrusion processing ne screw yakasimba shear chiito..Seti-up uye nzira yekugadzirisa data,iyo inoshandiswa kuyera shear viscosity yepolymer inonyunguduka nekushandisa screw extruder capillary.
Zvizhinji zvepolymer zvinhu zvinogadziriswa munzvimbo yakanyunguduka, iyo inosanganisira kunyungudika kuyerera uye deformation, iyo isingangokanganisa maitiro ekugadzirisa pachayo, asi zvakare inokanganisa kushanda kwekupedzisira kwechigadzirwa.Naizvozvo, kudzidza kweiyo rheological properties yepolymer zvinhu yave iri nyaya inopisa.Kuyera kwakaringana kwerheological parameters ndiyo hwaro hwekudzidza kwakadzama kweiyo rheological properties.
Shear viscosity chinhu chakakosha parameter kuratidza maitiro e rheological.Iyo inonzi shear viscosity yepolymer melt ireshiyo yeshear stress uye shear rate inonyungudika inoitwa mukuyerera.Kunyungudika kwepolymer kunokonzera pseudoplastic fluid, uye maitiro ayo ekuyerera ane maitiro ekuveura kutetepa.Zvinowanzodikanwa kushandisa hukama hwehukama pakati peshear viscosity uye shear rate, kureva shear viscosity spectrum, kuratidza zvizere maitiro ekugadzirisa epolymer melt.
Nzira huru yekuyera melt viscosity ndeyekuedza kuita kuti kunyunguduka kuyerera kuburikidza nechubhu refu uye nhete yecapillary, senge rakatenderera capillary chubhu.Iyo shear stress inogona kuverengerwa nekuyera kudonhedza kudonhedza pamigumo miviri yekunyunguduka sezvainoyerera kuburikidza necapillary tube.Chiyero cheshear chinogona kuverengerwa nekuyera kuyerera kwekunyunguduka pane imwe unit nguva.Saka iyo melt viscosity inogona kuwanikwa.
Iyo yakajairika nzira yekunyungudika kubva mucapillary chubhu ndeye kushandisa piston propulsion.Chakanakira nzira iyi ndechekuti INOSHANDISA mashoma ekuyedza zvinhu uye inogona kuwana yakakwira shear kushushikana.Iyo yakanyanya kudzvanywa capillary rheometer yakavakirwa pane iyi musimboti.Zvisinei, iyo yakashata yeiyi nzira yekuyedza ndeyokuti zvinhu hazvigone kuongororwa pasi peiyo chaiyo yekugadzirisa mamiriro, uye zvakaoma kuwana rheological maitiro epolymer inonyungudika kana ichigadziriswa.Kunyanya mukudzidza kwekusanganisa kugadziridzwa kwezvinhu zvakati wandei zvepolymer, iyo polymer inonyungudika inoda iyo yakasimba yekuveura chiito che screw kuti iwane chinangwa chekusanganisa.High pressure capillary rheometer haina kukodzera kuyedza zvinhu zvakadaro.
Iyo screw extrusion capillary rheological test device inogona kugadzirisa matambudziko ari pamusoro.Chishandiso INOSHANDISA simba rinokurudzira resiruu kuita kuti polymer inyunguduke ichiyerera nemucapillary chubhu.Naizvozvo, shear viscosity yepolymer melt inogona kuyerwa pasi pemamiriro ari padyo nekugadziriswa chaiko.Iyi nzira inonyanya kukodzera kuyerwa kweiyo rheological properties ye thermoplastic zvinhu uye masanganiswa avo.Nekuti kuyerwa kunotevedzera chaiyo nharaunda yekuyedza, iyo inowanikwa bvunzo paramita inogona kunyatso kutsanangura maitiro ezvishandiso mukugadziriswa chaiko.
Shear viscosity spectra yepolymer inonyunguduka inogona kuyerwa uchishandisa yakasarudzika bvunzo zviridzwa, senge high pressure capillary rheometers, kana akasanganiswa revolutions.Nekudaro, zvishandiso izvi zvinodhura uye zvishoma mukushandiswa kunoshanda, kunyanya mukushandiswa kwemaindasitiri makuru ekugadzira.Muchokwadi, hazvifanirwe kuvimba nechakakosha bvunzo chiridzwa, chero bedzi iyo shear viscosity test musimboti, unogona kushandisa iri nyore diki-screw.extruderuye capillary mold, inoumba inodhura shear viscosity spectrum test mudziyo.Yakasanganiswa nekombuta data processing, shear viscosity spectrum yepolymer melt inogona kuwanikwa nyore uye nekukurumidza.Iyi nzira inonyanya kukodzera kumabhizinesi madiki uye epakati nepakati kuita kugadzirwa kwechigadzirwa uye ongororo yezvinhu.
Nguva yekutumira: Jul-26-2019