Hauv kev lag luam roj hmab thiab cov khoom siv polymer, qhov qhib sib xyaw zeb tau ua haujlwm ntev los ua ib qho tseem ceeb tseem ceeb ntawm cov khoom siv. Nws plays lub luag haujlwm tseem ceeb hauv mastication, compounding, thiab txheej txheem kev loj hlob. Raws li kev lag luam roj hmab txav mus rau qhov kev ua tau zoo dua thiab kev ua tau zoo dua, daim ntawv thov kev qhib kev sib xyaw zeb txuas ntxiv nthuav dav, ua rau nws yog qhov tseem ceeb ntawm kev sib txuas ntawm cov khoom siv raw thiab cov khoom tiav.
Lub luag haujlwm tseem ceeb ntawm kev qhib sib tov zeb yog roj hmab mastication. Nyob rau hauv nws cov raw lub xeev, ntuj roj hmab muaj ib tug compact molecular qauv nrog siab elasticity tab sis tsis zoo processability. Los ntawm kev rov shearing thiab compression ntawm ob rotating yob, ib feem ntawm cov qauv saw molecular yog tawg, maj mam softening cov roj hmab thiab txhim kho nws plasticity rau tom ntej ua.
Lwm daim ntawv thov loj yog roj hmab compounding thiab additive dispersion. Hauv kev tsim cov roj hmab, ntau yam khoom xyaw xws li vulcanizing agents, fillers, plasticizers, thiab functional additives yuav tsum tau muab faib ua tus sib npaug hauv cov roj hmab matrix. Lub zog shear zog tsim los ntawm cov chais ua kom zoo sib xyaw, ua rau cov khoom siv tsis sib xws thiab cov khoom lag luam ruaj khov.
Cov cuab yeej siv kuj tau siv dav hauv kev tshawb fawb thiab kev tsim khoom tshiab. Cov kws tshawb fawb siv lub zeb rau kev sim tsim, kev sib piv kev ua tau zoo, thiab kev ua kom zoo. Cov kev sim me me - nplai pab ceev cov khoom siv coj los siv thiab muab cov ntaub ntawv txhim khu kev qha rau kev lag luam - nplai ntau lawm.
Tsis tas li ntawd, qhib kev sib xyaw zeb ua lub luag haujlwm tseem ceeb hauv kev tsim khoom thiab cov khoom siv rov ua dua tshiab. Nws yog siv los ua cov roj hmab rov qab ua dua tshiab, rov ua cov khoom siv rov ua dua tshiab, thiab ua ntej - sib tov cov ntaub ntawv ua ntej kev hloov kho. Cov ntawv thov no txhim kho kev siv cov khoom siv raw thiab pab txo cov nqi tsim khoom thaum txhawb nqa cov peev txheej rov ua tau zoo.
Zuag qhia tag nrho, qhib kev sib xyaw zeb yog koom nrog ntau theem tseem ceeb ntawm kev ua cov roj hmab, los ntawm mastication thiab compounding rau kev tshawb fawb thiab rov ua dua tshiab. Nws tseem yog ib qho khoom siv tseem ceeb hauv kev lag luam roj hmab.
