Hydroxypropyl methylcelluloseHPMCka whakawhiwhi i te kumete maku ki te tino pokey, ka tino whakanui ake te piri i waenga i te kumete maku me te paparanga turanga, me te whakapai ake i te mahi anti-sagging o te kumete. i te moata. Ka taea hoki e te hua matotoru o te cellulose ether te whakanui ake i te homogeneity me te anti-dispersion kaha o nga rauemi hou e pa ana ki te sima, te aukati i te delamination, te wehenga me te toto o te kumete me te raima, ka taea te whakamahi i roto i te raima whakakaha i te muka, te raima i raro i te wai me te whakakii whaiaro. raima .
Ko te Hydroxypropyl methylcellulose te whakanui ake i te pokey o nga mea hanga sima mai i te pokey o te otinga cellulose ether. Ko te pokey o te otinga cellulose ether te nuinga o te wa ka arotakehia e te tohu "pokey". Ko te pokey o te cellulose ether te tikanga e pa ana ki tetahi kukū (pērā i te 2%) o te otinga cellulose ether i te pāmahana kua tohua (pērā i te 20°C) me te kutikuti Ko te uara pokey e inehia ana e tetahi taputapu ine kua tohua (pērā i te viscometer hurihuri) i raro i te ahua o te tere (he tere hurihuri ranei, penei i te 20 rpm).
Ko te Viscosity tetahi waahanga nui hei arotake i te mahi o te cellulose ether. Ko te teitei ake o te viscosity o te otinga hydroxypropyl methylcellulose, ko te pai ake o te viscosity o te rauemi ciment-based, te pai ake te piri ki te tïpako, te pai ake te kaha anti-sagging me te anti-dispersing. He kaha, engari ki te nui rawa tona pokey, ka pa ki te rere me te mahi o nga mea hanga sima (penei i te whakapiri maripi raima i te wa e hangai ana te moata). Na reira, ko te 15,000~60,000 mPa te viscosity o te cellulose ether e whakamahia ana i roto i te kumete maroke. S-1, moata whakaōrite-whaiaro me te raima whakakoi-whaiaro e hiahia ana kia nui ake te rere o te wai me iti ake te pokey o te cellulose ether.
I tua atu, ko te kaha o te kaha o te hydroxypropyl methylcellulose ka piki ake te hiahia o te wai o nga mea e pa ana ki te ciment, na reira ka piki ake te hua o te kumete.
Ko te pokey o te otinga hydroxypropyl methylcellulose e whakawhirinaki ana ki nga mea e whai ake nei:
Te taumaha ngota ether cellulose (te tohu o te polymerization ranei) me te kukū, te pāmahana otinga, te tere kutikuti, me nga tikanga whakamatautau.
1. Ko te teitei ake o te polymerization o te cellulose ether, ko te nui ake o te taumaha ngota, me te teitei ake o te viscosity o tana otinga wai;
2. Ko te teitei ake o te inenga (te kukū ranei) o te cellulose ether, ko te teitei ake o te pokey o tana otinga wai, engari me aro ki te kowhiri i te inenga e tika ana ina whakamahia ana, kia kore ai e nui te inenga me te pa ki te mahi o te kumete. me te raima;
3. Pērā i te nuinga o ngā wai, ka heke te pōkākā o te otinga cellulose ether i te pikinga o te pāmahana, me te teitei ake o te kukū o te cellulose ether, ka nui ake te paanga o te pāmahana;
4. He pseudoplastics te nuinga o nga wairewa ether cellulose me nga ahuatanga kutikuti. Ko te teitei o te tere kutikuti i te wa o te whakamatautau, ka iti ake te pokey.
Na reira, ka whakahekehia te whakakotahitanga o te moata na te mahi a te kaha o waho, he painga ki te tarai i te hanga o te moata, kia pai ai te mahi me te whakakotahitanga o te moata i te wa ano. Heoi, ka iti rawa te kukū o te otinga cellulose ether me te iti rawa o te pokey, ka whakaatuhia nga ahuatanga o te wai Newtonian. Ka piki ake te kukū, ka āta whakaatuhia e te otinga nga ahuatanga o te wai pseudoplastic, me te teitei ake o te kukū, ka tino kitea te pseudoplasticity.
Wā tuku: Oketopa-10-2022