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Kev ntsuas viscosity rau kev saib xyuam qhov zoo yog qhov tswv yim physics tseem ceeb tshaj plaws rau qhov kev siv khoom siv plastic, uas txhawm rau muab cov khoom siv los ntawm kev siv tau zoo thiab kev siv tau zoo thiab qhov zoo ntawm cov khoom siv thaum pib. Hangzhou Zhongwang Technology Co., Ltd, yog ib qho kev siv khoom siv hauv lub ntiaj teb thiab tau txais ntau dua 80 qhov kev siv khoom siv tuaj yeem siv tau, muab cov khoom siv ntau yam uas muaj kev siv tau zoo thiab kev siv tau zoo rau cov neeg siv khoom siv plastic rau kev siv tau zoo thiab kev siv tau zoo ntawm cov khoom siv plastic.
Qhov sib npaug ntawm intrinsic viscosity thiab molecular weight
Yam ntxiv tshaj plaws rau kev sib piv ntawm cov khoom siv polymer thiab qhov loj ntawm cov khoom siv polymer los ntawm kev sib piv Mark-Houwink. Qhov loj dua yog qhov uas muaj cov kab mob polymer loj dua (thiab yog li ntawd, qhov loj dua ntawm cov khoom siv polymer), thiab qhov nyooj dua yog qhov uas muaj cov kab mob polymer nyooj dua thiab qhov loj ntawm cov khoom siv polymer nyooj dua.
Rau lub PET sample, intrinsic viscosity yuav tshwm sim rau 0.73 to 0.86 dL/g rau bottle grade resin thiab qhov nyooj dua 0.73 dL/g yuav raug xaiv rau fiber grade usage. Vim tias qhov sib npog ntawm cov khoom siv polymer yog qhov sib npog tshaj plaws, intrinsic viscosity yog siv ua kev txheeb xyuas qis dua rau kev paub qhov loj ntawm cov khoom siv polymer, tsis siv gel permeation chromatography method uas muaj nqi siab thiab yuav tsum muaj kev paub zoo heev.
Yus yuav tsum paub los ntawm cov lus hauv qab no txog ib qho polymer uas muaj intrinsic viscosity 0.80 dL/g uas siv rau hais lub tshuab ntawm cov dej noj. Intrinsic viscosity ntawm polymer yog qhov tseem ceeb rau cov qhov chaw sib sau ntawm nws qhov ntaub ntawv; cov polymer uas muaj intrinsic viscosity siab dua yuav nyuaj dua, muaj tensile strength siab dua, zoo dua rau kev puas, thiab zoo dua rau kev tswi tsis puas, nrog rau nws qhov molecular weight siab dua. Rau PET, nws yuav tshuaj xyuas nws qhov siv tau, vim tias intrinsic viscosity siab yog qhov zoo rau cov tshuab ntawm cov dej noj uas muaj carbonation thiab xav tau kev tswi tsis puas siab, lossis intrinsic viscosity tsis siab rau cov fibers thiab textiles.
Kev puas rau kev siv thiab kev ua haujlwm ntawm kev ua haujlwm
Qhov kev txhawb nqa cov khoom siv yog nyuaj rau qhov loj ntawm cov duab kub, uas muaj kev cuam tshuam rau qhov kev ntxiv (IV). Cov khoom siv uas muaj qhov loj ntawm cov duab kub siab dua yuav muaj qhov kev ntxiv ntawm cov duab kub siab dua. Yog li cas, qhov kev ntxiv ntawm cov duab kub siab dua, ces koj yuav tsum npaj qhov kev txhawb nqa, qhov kev txhawb nqa ntawm qhov kev ntxiv, thiab qhov kev siv hluav tais xob. Qhov kev xaiv qhov IV uas zoo yuav pab cov neeg tsim khoom xaiv qhov kev txhawb nqa uas zoo rau lawv, thiab qhov no yuav tsum tau txheeb xyuas tag nrho ntawm qhov kev txhawb nqa uas zoo.
Yog li cas, tsis matter dab tsi cov lus qhia rau cov khoom siv tsis muaj kev cuam tshuam, thiab nyob rau hauv qhov kev tsim kho tshiab, yuav muaj kev cuam tshuam ntau dua rau qhov sib npaug ntawm qhov ua kom zoo, qhov cua, lossis qhov muaj dej. Yog tsis muaj kev xav paub txog qhov sib npaug no, koj yuav tsis paub txog nws los ntawm kev test cov khoom, thiab koj lub thawj zaug yuav tsum tau ua dua lossis tau txiav tawm. Yog muaj kev xav paub txog qhov sib npaug ntawm IV raws li kev ua, ces koj yuav tuaj yeem paub txog nws thiab yuav tuaj yeem suav nws kom zoo.
Thiab rau cov kev siv tshiab ntaus, qhov paub txog kev siv viscosity yog qhov tseem ceeb. Cov neeg siv tshiab siv IV rau kev txav cov khoom uas tau los, txheeb xyuas qhov siv zoo tshaj plaws, thiab txheeb xyuas qhov ntsuas ntawm cov khoom uas tau siv tshiab. Qhov no yog tseem ceeb heev rau cov kev siv uas siv kev polycondensation hauv qhov chaw tuaj kom loj dua rau cov khoom uas tau muaj kev nyuaj rau hauv qhov chaw ua kom loj dua, vim tias kev txheeb xyuas IV hauv lub sijhawm nyob rau hauv qhov chaw txheeb xyuas tau pab rau kev siv khoom zoo.
Kev pab txhim kho qhov quality hauv txhua qhov kev sib koom tes
Txhua tus neeg ua kom paub qhov ntsuas intrinsic viscosity nyob rau hauv qhov kev siv plastics! - Cov neeg tsim resin yuav ntsuas raws li qhov ntsuas intrinsic viscosity thaum kawg ntawm qhov kev tsim polymerization kom paub tias cov khoom tau txais cov kev xav tau ntawm cov neeg siv khoom. Cov neeg siv khoom yuav ntsuas intrinsic viscosity ntawm cov khoom uas tuaj los kua lub cim thaum tsis tau nqis cov khoom los kom paub tias nws muaj qhov zoo tshaj plaws; lawv yuav ntsuas lub cim ntawm cov khoom uas tau siv dua los yog cov khoom uas tau siv dua rau hauv cov khoom sib xyaw. Qhov ntsuas thaum kawg los ntawm cov khoom sib xyaw kuj yuav ntsuas intrinsic viscosity; qhov no kom paub tias qhov kev siv khoom tsis cuam tshuam rau qhov polymer rau hauv qhov tshaj plaws uas tau xav tau.
Thaum cov khoom siv engineering plastics uas muaj qhov zoo tshaj plaws, piv txwv li cov khoom siv rau hauv cov roj tsis, cov khoom siv rau hauv cov roj tsis uas muaj qhov zoo tshaj plaws lossis cov khoom siv rau hauv cov roj tsis uas yuav tau siv rau hauv cov roj tsis uas tau siv rau hauv cov roj tsis, yuav tsum muaj cov qhov zoo tshaj plaws (mechanical, thermal, thiab/los yog chemical), qhov kev tswj qhov loj ntawm cov molecules raws li ntsuas intrinsic viscosity yuav tsum muaj qhov zoo tshaj plaws.
Cov laus uas nyob rau hauv qhov kev lag luam ntawm cov khoom siv plastic yuav tsum muaj cov lus qhia txog kev ntsuas viscosity ntawm cov khoom siv uas zoo thiab muaj kev txaus siab los pab rau kev txhawj siab thiab kev txiav txim rau cov kev lag luam ntawm lub ntiaj teb, piv txwv li ISO lossis ASTM.
Cov kev ntsuas viscosity ntawm cov khoom siv uas tau ua los ntawm cov khoom siv automation thaum no
Thiab compared rau cov kev ntsuas uas ua los ntawm tus neeg, uas yog qhov tsis zoo rau cov kev ntsuas Ubbelohde uas muaj kev ua haujlwm ntev thiab yuav tsum ua kom zoo rau cov khoom siv thiab yuav tsum ua kom zoo los ntawm tus neeg ua haujlwm, cov viscometer uas tau ua los ntawm cov khoom siv automation rau cov neeg lag luam plastic tau pab rau kev ua haujlwm zoo dua thiab kev saib xyuas qhov zoo ntawm cov khoom siv. Cov viscometer uas tau ua los ntawm cov khoom siv automation thaum no tau pab rau kev ua haujlwm zoo dua vim cov kev ua haujlwm ntawm kev sov thiab kev ntsuas tau ua kom zoo. Cov khoom siv no tau pab rau kev ntsuas zoo dua rau cov kev sib txawv leej twg ntawm cov molecular weight ntawm polymer thiab tau pab rau kev ua haujlwm ntau dua rau cov khoom siv uas tau ua los ntawm kev lag luam.
Kuam ntxiv rau qhov kev txheeb xyuas qhov viscosity ntawm cov khoom siv yuav pab tshem qhov teeb meem rau cov neeg txheeb xyuas, tshem qhov siv solvent zoo li cas, thiab xa cov lus piav qhia uas tuaj yeem siv rau kev txwv qhov quality control hauv qhov chaw tsim khoom.
Cov kev txheeb xyuas uas tau muab tswj kom ua tau los yog sib piv tau zoo li qhov kev txheeb xyuas hauv qhov industry, thiab tshem qhov xav ua los ntawm cov neeg txheeb xyuas rau cov khoom siv ntawm qhov glass, uas pab tshem qhov kev sib txuag ntawm cov neeg txheeb xyuas thiab pab tshem qhov teeb meem ntawm cov neeg txheeb xyuas los ntawm kev siv cov solvent uas muaj kev nyab soom. Hauv qhov laboratory tshiab, cov khoom siv uas tau muab tswj kom ua tau los no yuav pab tshem qhov xav ua los ntawm cov neeg txheeb xyuas rau kev txhawb cov khoom siv, thiab muaj cov kev tswj kom ua tau los rau kev txhawb cov khoom siv, kev tswj kom ua tau los rau qhov cua, thiab cov kev tswj kom ua tau los rau kev piav qhia cov lus piav qhia rau kev txwv qhov quality control.
Hangzhou Zhongwang Technology Co., Ltd. muab cov khoom siv uas muaj kev siv zoo, muaj kev siv tau los ntawm kev siv dua, thiab muaj kev siv tau los ntawm kev siv kom zoo rau cov neeg tsim plastics kom paub txog kev tsim ntawd. Tshaj tawm rau peb tam sim no kom paub ntau ntxiv txog peb cov khoom thiab yuav ua li cas kom paub txog kev tswj quality control uas peb xav tau.