Cov nyhuv ntawm Hydroxypropyl Methylcellulose ntawm Putty Viscosity

1. Cov khoom tseem ceeb ntawm Hydroxypropyl Methylcellulose

HPMC yog non-ionic dej-soluble polymer nrog zoo thickening, dej tuav, dispersion, emulsification thiab film-forming zog. Nws cov viscosity cuam tshuam los ntawm qib kev hloov pauv, qib ntawm polymerization thiab solubility tej yam kev mob. Cov tshuaj aqueous ntawm AnxinCel®HPMC nthuav tawm cov yam ntxwv ntawm cov kua dej pseudoplastic, uas yog, thaum tus nqi shear nce, cov viscosity ntawm cov tshuaj txo qis, uas yog ib qho tseem ceeb rau kev tsim kho ntawm putty.

2. Cov nyhuv ntawm HPMC ntawm putty viscosity

2.1 Thickening nyhuv

HPMC tsim cov tshuaj viscosity siab tom qab yaj hauv dej. Nws cov nyhuv thickening feem ntau yog tshwm sim hauv cov hauv qab no:

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

Txhim khu kev ua haujlwm ntawm putty: Tus nqi tsim nyog ntawm HPMC tuaj yeem txhim kho lubricity ntawm putty, ua scraping smoother thiab txo kev tsim kho.

Kev cuam tshuam rau lub zog kawg ntawm putty: Cov nyhuv thickening ntawm HPMC ua rau cov muab tub lim thiab cementitious cov ntaub ntawv nyob rau hauv putty tusyees dispersed, tsis txhob sib cais thiab txhim kho cov hardening kev ua tau zoo tom qab kev tsim kho.

2.2 Qhov cuam tshuam rau cov txheej txheem hydration

HPMC muaj cov khoom tuav dej zoo, uas tuaj yeem txo cov evaporation sai ntawm cov dej hauv txheej txheej, yog li ua kom lub sijhawm hydration ntawm cement-based putty thiab txhim kho lub zog thiab tawg tsis kam ntawm putty. Txawm li cas los xij, cov viscosity siab dhau ntawm HPMC yuav cuam tshuam rau huab cua permeability thiab ziab ceev ntawm putty, ua rau txo qis kev tsim kho. Yog li, tus nqi ntawm HPMC yuav tsum tau ua kom muaj peev xwm ua haujlwm thaum tsis txhob muaj kev cuam tshuam rau lub sijhawm hardening.

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

Qhov siab dua qhov hnyav molecular ntawm HPMC, qhov ntau dua qhov viscosity ntawm nws cov kua dej aqueous. Nyob rau hauv putty, siv high-viscosity HPMC (xws li hom uas muaj viscosity ntau dua 100,000 mPa·s) tuaj yeem txhim kho cov dej tuav thiab tiv thaiv cov khoom ntawm lub putty, tab sis nws kuj yuav ua rau txo qis hauv kev ua haujlwm. Yog li ntawd, nyob rau hauv kev tsim kho sib txawv, HPMC nrog lub viscosity tsim nyog yuav tsum raug xaiv kom sib npaug ntawm cov dej tuav, kev ua haujlwm thiab kev ua haujlwm kawg.