1. Okwu mmalite
Ngwakọta ihe mkpuchi nke polystyrene bụ ihe a na-ejikarị eme ihe maka iwu mkpuchi mgbidi dị n'èzí. Ọ na-ejikọta uru nke ihe ndị dị na polystyrene (EPS) na ngwa agha ọdịnala, na-enye mmetụta mkpuchi dị mma na ihe eji arụ ọrụ. Iji mee ka arụmọrụ ya dịkwuo mma, karịsịa iji welie adhesion ya, nkwụsị mgbawa na ịrụ ọrụ ihe owuwu, a na-agbakwunye uzuzu latex redispersible (RDP). RDP bụ emulsion polymer n'ụdị ntụ ntụ nke enwere ike ịgbasa na mmiri.
2. Nchịkọta nke ntụ ntụ latex redispersible (RDP)
2.1 Nkọwa na akụrụngwa
Uzuzu latex na-agbanwe agbanwe bụ ntụ ntụ emere site na ịgbasa ihicha emulsion polymer nwetara site na emulsion polymerization. Enwere ike ịgbasa ya na mmiri iji mepụta emulsion kwụsiri ike nke nwere ezigbo ihe nkiri na-emepụta ihe na nrapado. RDP ndị a na-ahụkarị gụnyere ethylene-vinyl acetate copolymer (EVA), acrylate copolymer na styrene-butadiene copolymer (SBR).
2.2 Isi ọrụ
A na-eji RDP eme ihe n'ọtụtụ ebe na ihe owuwu ụlọ ma nwee ọrụ ndị a:
Mee ka adhesion dịkwuo mma: Na-enye arụmọrụ nrapado dị mma, na-eme ka njikọ dị n'etiti ngwa agha na mkpụrụ, ngwa agha na polystyrene siri ike.
Melite nguzogide mgbape: kwalite mgbape mgbape nke ngwa agha site n'ịme ihe nkiri polymer na-agbanwe agbanwe.
Meziwanye arụmọrụ ihe owuwu: Mee ka mgbanwe na nrụpụta ihe nrụpụta nke ngwa agha dị, dị mfe ịgbasa na ọkwa.
Melite nguzogide mmiri na nkwụsi ike ifriizi: Mee ka nkwụsi ike nke mmiri dịkwuo elu na nguzogide ntu oyi nke ngwa agha.
3. Ngwa nke RDP na ngwongwo mkpuchi polystyrene
3.1 Melite ike njikọta
N'ime ngwa mkpuchi ihe mkpuchi nke polystyrene, adhesion bụ ọrụ dị mkpa. Ebe ọ bụ na ihe ndị dị na polystyrene n'onwe ha bụ ihe hydrophobic, ha dị mfe ịdaba na matrix ngwa ngwa, na-akpata ọdịda nke usoro mkpuchi. Mgbe agbakwunyere RDP, ihe nkiri polymer nke emere na ngwa agha ahụ nwere ike kpuchie elu nke polystyrene nke ọma, mee ka mpaghara njikọ dị n'etiti ha na matrix ngwa agha, ma melite ike njikọ ihu.
3.2 Emelitere mgbape mgbape
Ihe nkiri polymer nke RDP guzobere nwere nnukwu mgbanwe ma nwee ike ịmepụta ntupu n'ime ngwa agha iji gbochie mgbasawanye nke mgbawa. Ihe nkiri polymer nwekwara ike ịmịnye nrụgide nke ndị agha dịpụrụ adịpụ na-ebute, si otú ahụ na-egbochi mgbawa nke ọma site na mgbasawanye okpomọkụ na nkwụsịtụ ma ọ bụ nkwụsị.
3.3 Emelitere arụmọrụ ụlọ
Ngwakọta mkpuchi ihe mkpuchi nke polystyrene na-adịkarị mfe mmiri adịghị mma yana ihe isi ike n'ịgbasa n'oge a na-ewu ụlọ. Mgbakwunye nke RDP nwere ike imeziwanye mmiri na ịrụ ọrụ nke ngwa agha, na-eme ka ngwa agha dị mfe iji wuo na imeziwanye arụmọrụ ihe owuwu. Tụkwasị na nke ahụ, RDP nwekwara ike ibelata nkewa nke ngwa agha ma mee ka nkesa nke ngwa agha dịkwuo otu.
3.4 Mma mmiri na-eguzogide mmiri na ịdịte aka
Ngwakọta ihe mkpuchi nke polystyrene kwesịrị inwe ezigbo nguzogide mmiri na ogologo oge iji gbochie mmiri ozuzo ka ọ ghara imebi oyi akwa mkpuchi. RDP nwere ike ịmepụta oyi akwa hydrophobic na ngwa agha site na ihe ndị na-emepụta ihe nkiri, na-egbochi mmiri nke ọma ịbanye na ngwa ngwa. Tụkwasị na nke ahụ, ihe nkiri na-agbanwe agbanwe nke RDP na-enye nwekwara ike ime ka ihe mgbochi na-eme ka ngwa agha dịkwuo mma ma gbasaa ndụ nke mkpuchi mkpuchi.
4. Usoro nke ime ihe
4.1 Mmetụta imepụta ihe nkiri
Mgbe RDP gbasasịrị n'ime mmiri n'ime ngwa agha ahụ, ihe ndị ahụ polymer ji nwayọọ nwayọọ na-ejikọta n'ime otu iji mepụta ihe nkiri polymer na-aga n'ihu. Ihe nkiri a nwere ike mechie obere oghere ndị dị na ngwa ngwa, gbochie ntinye nke mmiri na ihe ndị na-emerụ ahụ, ma welie njikọ dị n'etiti ihe ndị ahụ.
4.2 Mmetụta interface emelitere
N'oge usoro siri ike nke ngwa agha ahụ, RDP nwere ike ịkwaga na interface n'etiti ngwa agha na ihe ndị dị na polystyrene iji mepụta oyi akwa interface. Ihe nkiri polymer a nwere njikọ siri ike, nke nwere ike imeziwanye ike njikọ dị n'etiti ihe ndị dị na polystyrene na ngwa ngwa matriks ma belata ọgbọ nke interface cracks.
4.3 Emelitere mgbanwe
Site n'ịmepụta usoro netwọkụ na-agbanwe agbanwe n'ime ngwa agha, RDP na-abawanye mgbanwe n'ozuzu nke ngwa agha ahụ. Netwọk a na-agbanwe agbanwe nwere ike ịgbasa nrụgide dị n'èzí ma belata nrụgide nrụgide, si otú ahụ na-eme ka nkwụsị mgbawa na ịdịte aka nke ngwa agha.
5. Mmetụta nke mgbakwunye RDP
5.1 Ego mgbakwunye kwesịrị ekwesị
Ọnụ ego nke RDP agbakwunyere nwere mmetụta dị ukwuu na arụ ọrụ nke mkpuchi mkpuchi ihe mkpuchi polystyrene. N'ozuzu, ọnụọgụ RDP agbakwunyere dị n'etiti 1-5% nke mkpokọta simenti. Mgbe ego agbakwunyere na-agafeghị oke, ọ nwere ike imeziwanye ike njikọta, mgbape mgbawa na ịrụ ọrụ nke ngwa agha ahụ. Agbanyeghị, mgbakwunye gabigara ókè nwere ike ịbawanye ọnụ ahịa ma na-emetụta ike na mkpakọ nke ngwa agha ahụ.
5.2 Mmekọrịta dị n'etiti ego mgbakwunye na arụmọrụ
Ike njide: Ka ọnụ ọgụgụ nke RDP agbakwunyere na-abawanye, ike njikọ nke ngwa agha ahụ ji nwayọọ nwayọọ na-abawanye, ma mgbe ha rutere n'ókè ụfọdụ, mmetụta nke ịbawanye ụba ego agbakwunyere na nkwalite nke ike njikọ dị oke.
Nguzogide mgbawa: Ọnụ RDP kwesịrị ekwesị nwere ike imeziwanye nkwụsi ike nke ngwa agha ahụ, na mgbakwunye ntakịrị ma ọ bụ nke ukwuu nwere ike imetụta mmetụta ya kacha mma.
Ịrụ ọrụ ihe owuwu: RDP na-eme ka mmiri na-arụ ọrụ nke ngwa ngwa na-arụ ọrụ, ma ihe mgbakwunye dị ukwuu ga-eme ka ngwa agha ahụ ghọọ nnukwu viscous, nke na-adịghị akwado ọrụ ụlọ.
6. Ngwa na mmetụta bara uru
6.1 Ihe owuwu
N'ime ọrụ n'ezie, a na-eji RDP eme ihe na sistemu mkpuchi mpụta (EIFS), ngwa agha plasta na ngwa agha njikọta. Dịka ọmụmaatụ, na mgbidi mkpuchi mgbidi dị n'èzí nke nnukwu ụlọ ahịa azụmahịa, site n'ịgbakwụnye 3% RDP na ngwongwo mkpuchi nke polystyrene, arụ ọrụ ihe owuwu na mmetụta mkpuchi nke ngwa agha na-eme ka ọ dịkwuo mma, na ihe ize ndụ nke ịgbawa n'oge usoro ihe owuwu bụ. belata nke ọma.
6.2 Nnwale nnwale
Ọmụmụ ihe nnwale ahụ gosiri na ụrọ mkpuchi ihe mkpuchi nke polystyrene na mgbakwunye RDP nwere mmụba dị ukwuu na ike njikọta, ike mkpakọ na mgbochi mgbawa na ụbọchị 28. E jiri ya tụnyere njikwa njikwa na-enweghị RDP, ike njikọ nke ihe atụ nke RDP gbakwunyere na-abawanye site na 30-50% na nkwụsị mgbawa mụbara site na 40-60%.
Redispersible latex ntụ ntụ (RDP) nwere uru ngwa dị mkpa na ngwa mkpuchi ihe mkpuchi polystyrene. Ọ na-eme ka arụmọrụ zuru oke nke ngwa agha mkpuchi ahụ dịkwuo mma site n'ịkwalite ike nkekọ, melite nkwụsị mgbape, melite arụmọrụ ihe owuwu, na ịkwalite nguzogide mmiri na ịdịte aka. N'ime ngwa bara uru, mgbakwunye kwesịrị ekwesị nke RDP nwere ike imeziwanye nkwụsi ike na ịdịte aka nke usoro mkpuchi ahụ, na-enye nkwa dị mkpa maka ịmepụta nchekwa ike na nchekwa nhazi.
Oge nzipu: Jun-19-2024