Cov nyhuv ntawm Hydroxypropyl Methylcellulose rau Putty Viscosity

1. Cov khoom tseem ceeb ntawm Hydroxypropyl Methylcellulose

HPMC yog cov polymer uas yaj hauv dej uas tsis yog ionic nrog cov khoom zoo thickening, water retention, dispersion, emulsification thiab film-forming. Nws cov viscosity raug cuam tshuam los ntawm qib kev hloov pauv, qib polymerization thiab solubility. Cov kua dej ntawm AnxinCel®HPMC qhia txog cov yam ntxwv ntawm cov kua pseudoplastic, uas yog, thaum tus nqi shear nce, qhov viscosity ntawm cov kua txo qis, uas yog qhov tseem ceeb rau kev tsim cov putty.

2. Cov nyhuv ntawm HPMC rau putty viscosity

2.1 Cov nyhuv tuab

HPMC tsim cov kua viscosity siab tom qab yaj hauv dej. Nws cov nyhuv thickening feem ntau yog pom tseeb hauv cov hauv qab no:

Txhim kho qhov thixotropy ntawm putty: HPMC tuaj yeem ua kom cov putty nyob rau ntawm qhov viscosity siab thaum nws nyob ruaj khov kom tsis txhob sagging, thiab txo qhov viscosity thaum khawb thiab txhim kho kev ua haujlwm ntawm kev tsim kho.

Txhim kho qhov ua haujlwm ntawm putty: Ib qho HPMC tsim nyog tuaj yeem txhim kho qhov lubricity ntawm putty, ua rau khawb du thiab txo qhov kev tsim kho tsis kam.

Cuam tshuam rau lub zog kawg ntawm putty: Qhov cuam tshuam ntawm HPMC ua rau cov khoom siv thiab cov khoom siv cementitious hauv putty sib npaug zos, zam kev sib cais thiab txhim kho kev ua haujlwm hardening tom qab kev tsim kho.

2.2 Cov nyhuv rau cov txheej txheem hydration

HPMC muaj cov khoom zoo heev uas khaws dej tau zoo, uas tuaj yeem txo qhov dej ntws sai sai hauv cov txheej putty, yog li ua kom lub sijhawm ua kom noo ntawm cov cement-based putty ntev dua thiab txhim kho lub zog thiab kev tiv thaiv tawg ntawm putty. Txawm li cas los xij, viscosity siab dhau ntawm HPMC yuav cuam tshuam rau huab cua permeability thiab qhov ceev ziab ntawm putty, ua rau kev tsim kho txo ​​qis. Yog li ntawd, qhov ntau ntawm HPMC yuav tsum tau ua kom ntseeg tau tias ua haujlwm tau thaum zam kev cuam tshuam tsis zoo rau lub sijhawm tawv.

2.3 Kev sib raug zoo ntawm qhov hnyav molecular ntawm HPMC thiab qhov viscosity ntawm putty

Qhov hnyav molecular ntawm HPMC siab dua, qhov viscosity ntawm nws cov kua dej ntau dua. Hauv putty, kev siv HPMC viscosity siab (xws li hom nrog viscosity ntau dua 100,000 mPa · s) tuaj yeem txhim kho qhov kev khaws dej thiab cov khoom tiv thaiv kev sagging ntawm putty, tab sis nws kuj tseem yuav ua rau kev ua haujlwm tsawg dua. Yog li ntawd, nyob rau hauv cov kev cai tsim kho sib txawv, HPMC nrog viscosity tsim nyog yuav tsum tau xaiv los sib npaug kev khaws dej, kev ua haujlwm thiab kev ua tau zoo kawg.