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Melt flow index ntawm low-density polyethylene txiav txim raws li molecular hnyav thiab branching zog

Tus nqi MFI hais nyob rau hauv ntau cov ntaub ntawv yog hais txog tus nqi ntawm cov polymer uas yog extruded los ntawm ib tug paub muab orifice (tuag) thiab qhia raws li kom muaj nuj nqis nyob rau hauv g / 10 mins los yog rau Melt Volume Rate nyob rau hauv cm3 / 10mins .

low-density polyethylene (LDPE) yog tus cwj pwm raws li lawv cov Melt Flow Index (MFI).LDPE's MFI muaj feem cuam tshuam rau nws qhov nruab nrab molecular hnyav (Mw).Ib qho kev nthuav dav ntawm cov qauv kev tshawb fawb ntawm LDPE reactors muaj nyob rau hauv cov ntaub ntawv qhib qhia tau hais tias muaj kev tsis sib haum xeeb ntawm cov kws tshawb fawb txog kev sib raug zoo ntawm MFI-Mw, yog li kev tshawb fawb los tsim kev sib raug zoo yuav tsum tau ua.Qhov kev tshawb fawb no sau ntau yam kev sim thiab kev lag luam cov ntaub ntawv ntawm cov khoom LDPE sib txawv.Kev sib raug zoo ntawm MFI thiab Mw tau tsim thiab kev tshuaj xyuas ntawm MFI thiab Mw kev sib raug zoo yog hais txog.Qhov feem pua ​​​​ntawm kev ua yuam kev ntawm cov qauv kev kwv yees thiab cov ntaub ntawv kev lag luam txawv ntawm 0.1% mus rau 2.4% uas tuaj yeem suav tias yog qhov tsawg kawg nkaus.Cov qauv nonlinear tau txais qhia txog qhov muaj peev xwm ntawm qhov sib npaug tsim los piav qhia qhov sib txawv ntawm cov ntaub ntawv kev lag luam, yog li ua rau muaj kev ntseeg siab ntau dua hauv LDPE qhov kev kwv yees MFI.