I-HPMC (Hydroxypropyl Methylcellulose)yimathiriyeli yeekhemikhali zepolymer edla ngokusetyenziswa kushishino lokwakha. Isetyenziswe ngokubanzi kwi-samente-based mortar, i-dry-mixed mortar, i-adhesives kunye nezinye iimveliso zokunyusa, ukugcina amanzi, ukuphucula Inemisebenzi emininzi efana nokubambelela kunye nokuphuculwa komsebenzi wokwakha. Indima yawo kudaka ibaluleke kakhulu, ngakumbi ekuphuculeni ukuxhathisa kokuqhekeka kodaka.
1. Ukugcinwa kwamanzi okongeziweyo
I-HPMC inokugcinwa kakuhle kwamanzi, nto leyo ethetha ukuba amanzi akayi kuphuphuma ngokukhawuleza ngexesha lenkqubo yokwakha udaka, ngaloo ndlela kuthintelwa ukuqhekeka kweentanda ezibangelwa yilahleko enkulu yamanzi. Ngokukodwa kwiindawo ezomileyo kunye nobushushu obuphezulu, umphumo wokugcinwa kwamanzi we-HPMC ubalaseleyo. Ukufuma kodaka kunokuhlala kuzinzile kangangexesha elithile ukuthintela ukomiswa kwangaphambi kwexesha, nto leyo ebaluleke kakhulu ekuphuculeni ukuxhathisa kokuqhekeka kodaka. Ukugcinwa kwamanzi kunokulibazisa inkqubo ye-hydration ye-samente, ukuvumela amaqhekeza e-samente ukuba aphendule ngokupheleleyo ngamanzi ngexesha elide, ngaloo ndlela ephucula ukuxhathisa kokuqhekeka kodaka.
2. Ukuphucula ukunamathela kodaka
Njenge-thickener, i-HPMC inokwenza ulwakhiwo olulungileyo lwenethiwekhi yemolekyuli kudaka ukunyusa ukuncamathela kunye nolwelo lodaka. Oku akukona nje ukuphucula amandla okudibanisa phakathi kodaka kunye nomgangatho wesiseko kunye nokunciphisa ukuchithwa kwe-interface layer, kodwa kuphucula ukuqina kodaka kunye nokunciphisa ukwenzeka kweentanda ezibangelwa yimikhosi yangaphandle ngexesha lenkqubo yokwakha. Ukubambelela kakuhle kwenza udaka lube lufana ngakumbi ngexesha lokwakha kwaye lunciphisa iintanda ezibangelwa bubunzima obungalinganiyo kumalungu.
3. Ukuphucula iplastiki kunye nokusebenza kodaka
I-HPMC iphucula iplastiki kunye nokusebenza kodaka, oko kunokuphucula ngokufanelekileyo ukulungelelaniswa kolwakhiwo. Ngenxa yesiphumo sayo esityebileyo, i-HPMC inokwenza udaka lube nokuncamathela okungcono kunye nokwakheka, ukunciphisa ngokufanelekileyo ukwenzeka kweentanda ezibangelwa ludaka olungalinganiyo kunye nolwelo olubi ngexesha lokwakha. Iplastiki efanelekileyo yenza udaka lugxininise ngakumbi ngexesha lokumisa kunye nokunciphisa, ukunciphisa amathuba okuqhekeka ngenxa yoxinzelelo olungalinganiyo.
4. Nciphisa iintanda zokucutheka
I-Dry shrinkage kukucutheka komthamo obangelwa kukuphuphuma kwamanzi ngexesha lokumisa udaka. Ukuncipha okomileyo ngokugqithisileyo kuya kubangela iintanda kumphezulu okanye ngaphakathi kodaka. I-HPMC icotha ukuphuphuma kwamanzi ngokukhawuleza kwaye inciphisa ukwenzeka kokuncipha okomileyo ngokugcina amanzi aphezulu kunye neziphumo zokuphucula iplastiki. Uphando lubonisa ukuba udaka olongeziweyo kunye ne-HPMC lunomlinganiselo ophantsi wokomisa wokomisa kwaye umthamo walo utshintsha kancinci ngexesha lenkqubo yokomisa, ngaloo ndlela ukuthintela ngokufanelekileyo iintanda ezibangelwa ukomisa ukuncipha. Kwiindonga zeendawo ezinkulu okanye imigangatho, ngakumbi ehlotyeni okanye kwiindawo ezinomoya kunye nezomileyo, indima ye-HPMC ibaluleke kakhulu.
5. Ukuphucula ukuxhathisa kokuqhekeka kodaka
Ulwakhiwo lwemolekyuli ye-HPMC inokwenza intsebenziswano ethile yeekhemikhali kunye nesamente kunye nezinye izinto ezingaphiliyo kudaka, okwenza ukuba udaka lube nokumelana nokuqhekeka okuphezulu emva kokuqina. La mandla okuqhekeka okongeziweyo akuveli kuphela kwindibaniselwano kunye ne-HPMC ngexesha lenkqubo yesamente yokufakwa kwamanzi, kodwa ikwaphucula ukuqina kodaka ukuya kuthi ga kwinqanaba elithile. Ukuqina komdaka emva kokuqina kuphuculwe, okunceda ukujamelana noxinzelelo olukhulu lwangaphandle kwaye alukwazi ukuchasana. Ngokukodwa kwiindawo ezinomahluko omkhulu wobushushu okanye utshintsho olukhulu kwimithwalo yangaphandle, i-HPMC inokuphucula ngokufanelekileyo ukuxhathisa kokuqhekeka kodaka.
6. Ukwandisa ukunganyangeki kodaka
Njengezinto eziphilayo zepolymer, i-HPMC inokwenza i-microscopic network structure kudaka ukuze kuphuculwe ukubumbana kodaka. Olu phawu lwenza ukuba udaka lungabi namanzi kwaye lunciphise ukunyanzeliswa komswakama kunye nezinye imidiya yangaphandle. Kwindawo emanzi okanye emanzi, ukuqhekeka kumphezulu kunye nangaphakathi kodaka kunokwenzeka ukuba kuhlaselwe ngumswakama, okukhokelela ekwandiseni okuqhubekayo kweentanda. Ukongezwa kwe-HPMC kunokunciphisa ngokufanelekileyo ukungena kwamanzi kwaye kuthintele ukwandiswa kweentanda ezibangelwa ukungena kwamanzi, ngaloo ndlela kuphuculwe ukuxhathisa kokuqhekeka kodaka ukuya kwinqanaba elithile.
7. Ukuthintela ukuveliswa kunye nokwandiswa kwee-micro-cracks
Ngethuba lokumisa kunye nokuqiniswa kwenkqubo yodaka, ukuqhekeka kwe-micro ngokuqhelekileyo kwenzeka ngaphakathi, kwaye ezi ziqhekeza ezincinci zinokwandisa ngokuthe ngcembe kwaye zenze ukuqhekeka okubonakalayo phantsi kwesenzo samandla angaphandle. I-HPMC inokwenza i-uniform network structure ngaphakathi kodaka ngokusebenzisa isakhiwo sayo se-molecular, ukunciphisa amathuba okuqhekeka kwe-micro-cracks. Nokuba iintanda ezincinci zenzeka, i-HPMC inokudlala indima ethile yokuchasana nokuqhekeka kwaye ibathintele ekwandiseni okungakumbi. Oku kungenxa yokuba amakhonkco e-polymer e-HPMC anokusasaza ngokufanelekileyo uxinzelelo kumacala omabini e-crack ngokusebenzisa intsebenziswano ye-intermolecular kumdaka, ngaloo ndlela ethintela ukwanda kokuqhekeka.
8. Phucula imodyuli elastiki yodaka
Imodyuli ye-elastic luphawu olubalulekileyo lokukwazi ukuxhathisa inguquko. Kwi-mortar, i-modulus ephezulu ye-elastic inokwenza ukuba izinze ngakumbi xa iphantsi kwamandla angaphandle kwaye ayinakwenzeka ukuba ibangele ukuguqulwa okukhulu okanye ukuqhekeka. Njenge-plasticizer, i-HPMC inokunyusa imodyuli yayo e-elastic kumdaka, ivumela udaka ukuba lugcine ngcono ubume bayo phantsi kwesenzo samandla angaphandle, ngaloo ndlela inciphisa ukwenzeka kweentanda.
HPMCiphucula ngokufanelekileyo ukuxhathisa kokuqhekeka kodaka kwiinkalo ezininzi ngokuphucula ukugcinwa kwamanzi, ukunamathela, iplastiki kunye nokusebenza kodaka, ukunciphisa ukwenzeka kweentanda eziqhekezayo ezomileyo, kunye nokuphucula amandla okumelana nokuqhekeka, ukunganyanzeki kunye ne-elastic modulus. ukusebenza. Ngoko ke, ukusetyenziswa kwe-HPMC kudaka lokwakha akunakuphucula kuphela ukuxhathisa ukuqhekeka kodaka, kodwa nokuphucula ukusebenza kokwakhiwa kunye nokwandisa ubomi benkonzo yodaka.
Ixesha lokuposa: Dec-16-2024