Hydroxypropyl Methylcellulose ua cov neeg sawv cev sib cais, cov khoom tau txais muaj cov khoom sib xyaw thiab xoob, qhov ntom ntom pom tseeb thiab kev ua haujlwm zoo heev. Txawm li cas los xij, kev siv Hydroxypropyl Methylcellulose ib leeg tuaj yeem pab txhawb rau qhov tsis hloov pauv zoo ntawm cov resin. Kev ua haujlwm tag nrho ntawm cov resin tsis zoo. Kev siv cov khoom sib xyaw ntawm hydroxypropyl methylcellulose thiab ntau qib alcoholysis ntawm polyvinyl cawv tuaj yeem ua rau kev ua haujlwm ntawm cov khoom zoo dua, qhov zoo yooj yim los tswj thiab tib lub sijhawm tuaj yeem txo tus nqi. Tus neeg sawv cev dispersing yog qhov tseem ceeb uas cuam tshuam rau cov duab ntawm cov khoom me me ntawm polyvinyl chloride resin. Qhov me dua qhov nro ntawm qhov dej ntawm cov neeg sawv cev dispersing dav dav thiab qhov nro interfacial nrog Vinyl chloride monomer yog, qhov zoo dua VCM droplets tuaj yeem dispersed. Thiab yog li qhov loj me ntawm cov khoom me me ntawm PVC resin yuav me dua. Qhov muaj zog ntawm kev tiv thaiv ntawm tus neeg sawv cev dispersing yog, qhov ze dua cov khoom PVC resin tau txais yuav thiab qhov me dua qhov porosity yuav yog. Thiab intergranular coalescence kuj nyuaj dua, yog li nws yooj yim los tsim cov resins.
Piv txwv li, nyob rau hauv lub kaw lus sib xyaw ua ke ntawm PVA thiab HPC, qhov siab dua ntawm qib alcohollysis ntawm PVA yog, qhov ntau dua qhov nro ntawm qhov dej yuav yog thiab qhov muaj zog dua qhov muaj peev xwm tiv thaiv yuav yog, thaum qee qhov concentration ntawm hydroxypropyl methylcellulose muaj cov nyhuv dispersing zoo. Yog li ntawd, siv PVA nrog qib alcohollysis siab ua lub hauv paus
tus neeg sawv cev dispersing, thiab compounding a
qee qhov ntau ntawm hydroxypropyl methylcellulose
Ua tus neeg sawv cev rau kev ncua polymerization, nws yooj yim dua los npaj cov PVC resin uas tuaj yeem ua tau raws li qhov xav tau ntawm cov qauv ntawm cov khoom me me. Piv txwv li, hauv cov txheej txheem sib xyaw ua ke ntawm PVA thiab HPC, qib alcoholysis ntawm PVA siab dua, qhov nro ntawm qhov dej ntau dua thiab qhov muaj zog ntawm kev tiv thaiv yuav muaj zog dua, thaum qee qhov concentration ntawm hydroxypropyl methylcellulose muaj cov nyhuv dispersing zoo.
Lub sijhawm tshaj tawm: Lub Peb Hlis-17-2022