Domin rheological hali na polymer narkewa ne daidai halin extrusion aiki da dunƙule karfi karfi mataki..Hanyar saiti da sarrafa bayanai,wanda ake amfani da shi don auna danko mai ƙarfi na polymer narkewa ta hanyar amfani da screw extruder capillary.
Yawancin kayan aikin polymer ana sarrafa su a cikin yanayin narkewa, wanda ya haɗa da kwararar narkewa da nakasawa, wanda ba wai kawai yana shafar tsarin sarrafa kansa ba, har ma yana rinjayar aikin ƙarshe na samfurin.Saboda haka, nazarin rheological Properties na polymer kayan ya kasance mai zafi batu.Daidaitaccen ma'auni na ma'auni na rheological shine tushen bincike mai zurfi na kaddarorin rheological.
Shear danko wani muhimmin siga ne don siffanta halayen rheological.Abin da ake kira danko danko na polymer narkewa shine rabo na damuwa mai karfi da kuma raguwa wanda aka narke a cikin tsarin gudana.Narkewar polymer yana haifar da ruwan pseudoplastic, kuma yanayin kwararar sa yana da sifofin ɓacin rai.Yawancin lokaci ya zama dole a yi amfani da lanƙwan alaƙa tsakanin danko mai ƙarfi da ƙimar ƙarfi, watau shear danko bakan, don cikakken nuna halayen sarrafawa na narke polymer.
Babban hanyar auna dankon narkewa shine a yi ƙoƙarin sa narkewar ta gudana ta cikin bututun capillary mai tsayi kuma sirara, kamar bututun capillary zagaye.Za'a iya ƙididdige yawan damuwa ta hanyar auna matsewar matsa lamba a ƙarshen biyu na narkewa yayin da yake gudana ta cikin bututun capillary.Ana iya ƙididdige ƙimar juzu'i ta hanyar auna juzu'in narke kowane lokaci naúrar.Ta haka za a iya samun danko narke.
Hanya na al'ada don fitar da narke daga cikin bututun capillary shine amfani da piston propulsion.Amfanin wannan hanyar shine yana AMFANI da ƙarancin kayan gwaji kuma yana iya samun damuwa mai ƙarfi.Babban matsi na capillary rheometer yana dogara ne akan wannan ka'ida. Duk da haka, rashin amfani da wannan hanyar gwaji shine cewa ba za'a iya gwada kayan aiki a ƙarƙashin yanayin aiki na ainihi ba, kuma yana da wuya a sami halayen rheological na polymer narke lokacin da aka sarrafa shi.Musamman a cikin binciken gyare-gyaren haɗakarwa na kayan aikin polymer da yawa, narke polymer yana buƙatar aiki mai ƙarfi na juzu'i don cimma manufar haɗakarwa.Babban matsa lamba capillary rheometer bai dace da gwada irin waɗannan kayan ba.
The dunƙule extrusion capillary rheological na'urar gwajin iya magance matsalolin da ke sama.Na'urar tana AMFANI da ƙarfin motsa jiki na dunƙule don sanya polymer narke ta cikin bututun capillary.Sabili da haka, ana iya auna danko mai ƙarfi na narke polymer a ƙarƙashin yanayin kusa da aiki na gaske.Wannan hanya ta dace musamman don auna abubuwan rheological na kayan thermoplastic da gaurayawan su.Saboda ma'aunin yana daidaita yanayin gwaji na ainihi, ma'aunin gwajin da aka samu zai iya kwatanta halayen kayan aiki daidai.
Za a iya auna bakan danko mai ƙarfi na polymer narkewa ta amfani da na'urorin gwaji na musamman, irin su babban matsi na capillary rheometer, ko haɗin juyin juya hali.Duk da haka, waɗannan na'urori suna da tsada kuma suna da iyaka a amfani da su, musamman a cikin aikace-aikacen manyan masana'antu.A gaskiya ma, ba lallai ba ne don dogara ga kayan aikin gwaji na musamman, idan dai ka'idar gwajin viscosity na shear, zaka iya amfani da ƙananan ƙananan guda ɗaya.extruderda mold capillary, ya zama na'urar gwajin danko mai rahusa mai rahusa.Haɗe tare da sarrafa bayanan kwamfuta, za a iya samun bakan danko mai ƙarfi na polymer narkewa cikin sauƙi da sauri.Wannan hanya ta dace musamman ga kanana da matsakaitan masana'antu don aiwatar da haɓaka samfura da duban albarkatun ƙasa.
Lokacin aikawa: Yuli-26-2019