Ua ntej, txheej txheem cov ntsiab lus
1. Kev kho deg ntawm lub hauv paus zaj duab xis
Lwm cov additives, tshwj xeeb tshaj yog cov emulsifiers, kuj muaj kev cuam tshuam loj rau kev ua tau zoo ntawm cov nplaum siv hauv cov yeeb yaj kiab tiv thaiv nto. Cov kws tshaj lij hauv tsev siv cov txheej txheem ua ntej emulsified noob emulsion polymerization txheej txheem los ua ke emulsion hom rhiab nplaum rau cov yeeb yaj kiab tiv thaiv, thiab kawm txog cov txiaj ntsig ntawm tus nqi ntawm emulsifier thiab multi-functional aziridine crosslinking tus neeg saib xyuas hauv qab theem noob emulsion ntawm cov khoom ntawm emulsion. hom rhiab nplaum. Cov txiaj ntsig kev tshawb fawb pom tau tias: Nrog rau qhov nce ntawm cov emulsifier hauv cov noob emulsion, qhov loj me ntawm cov latex txo qis, thiab cov viscosity, qhov nro ntawm qhov chaw thiab kev sib cuag lub kaum sab xis ntawm emulsion nce. Kev laus tsis kam ntawm emulsion siab-rhiab nplaum nplaum tuaj yeem txhim kho tau zoo los ntawm kev nce tus neeg sawv cev crosslinking. Piv nrog rau qhov kub thiab txias, qhov cuam tshuam ntawm cov av noo ntawm kev laus ua haujlwm ntawm emulsion siab-rhiab nplaum nplaum yog qhov tseem ceeb dua. Lub polarity thiab tiav ntawm qhov saum npoo ntawm cov khoom tiv thaiv kuj tseem muaj feem cuam tshuam rau kev laus ua haujlwm ntawm lub siab-rhiab nplaum nplaum.
Cov kws tshaj lij hauv tsev tau npaj acrylate siab rhiab nplaum nplaum emulsion los ntawm txoj kev preemulsification, thiab tau tham txog kev cuam tshuam ntawm cov tshuab emulsifier sib txawv ntawm lub cev lub zog ntawm cov nplaum nplaum. Qhov kev ntsuam xyuas infrared spectrum tau pom tias reactive emulsifier tau koom nrog cov tshuaj tiv thaiv. Cov txiaj ntsig ntawm TEM tau pom tias cov emulsion tau txais los ntawm cov txheej txheem reactive emulsifier muaj qhov me me me me thiab cov khoom sib xws. Cov txiaj ntsig kev sim qhia tau tias: Thaum w (compound emulsifier) {{{0}}}%, m (ANPE010): m (DNS - 458) : m (DNS {{3}). }})=1.5, 1.1, 0.4, Qhov loj feem ntawm cov emulsion tau yog 48.03%, kev hloov pauv monomer yog 97.66%, emulsion viscosity yog 38.8s, qhov nruab nrab particle loj yog 238nm, thiab thawj zaug adhesion ntawm lub siab-rhiab nplaum nplaum muaj peev xwm nqus tau No.8 steel pob, thiab qhov adhesion yog ntau tshaj 24h. 180 degree peeling zog mus txog 0.304N / mm. Cov yeeb yaj kiab tiv thaiv txuas nrog cov hlau tsis huv, tom qab ci ntawm 80 degree C rau 24h, stainless hlau nto tsis muaj cov kua nplaum seem thiab pos huab. Siv ethyl acetate ua hnyav thiab azodiisobutadionitrile ua tus thawj coj, acrylic siab rhiab nplaum nplaum rau saum npoo tiv thaiv zaj duab xis tau npaj los ntawm kev daws cov txheej txheem polymerization. Cov teebmeem ntawm sab hauv crosslinking tus neeg saib xyuas TC, tus neeg sawv cev txuas txawv teb chaws SaC-100 thiab dej polyisomer (Bayhydur3100) ntawm tev lub zog thiab kub tsis kam ntawm cov nplaum tau kawm. Cov txiaj ntsig tau pom tias lub zog sib koom ua ke ntawm colloid tuaj yeem nce ntxiv thiab cov kua nplaum seem tuaj yeem raug tshem tawm los ntawm kev qhia txog tus neeg sawv cev sab hauv.
SaC{{0}} tau zoo dua Bayhydur3100 hauv kev txhim kho cua sov thiab txo cov tawv nqaij. Siv 0.80% monomer ntawm sab hauv crosslinking tus neeg saib xyuas TC thiab 1.0% ntawm cov kua nplaum ntawm cov neeg sawv cev txuas nrog SaC-100, cov yeeb yaj kiab tiv thaiv nto muaj kev ua tau zoo, thiab tsis muaj cov kua nplaum seem thiab "duab ntxoov ntxoo" nyob rau hauv qhov ntsuas kub tiv thaiv ntawm high finish stainless hlau phaj. Thaum siv cov yeeb yaj kiab uas tsis yog polyethylene thiab polypropylene cov yeeb yaj kiab, vim yooj yim los ntub lub siab rhiab ua kua (lossis emulsion), tom qab txheej Lub siab rhiab nplaum nplaum, lub zog nplaum (adhesive puag quab yuam) ntawm lub substrate thiab lub siab rhiab nplaum nplaum kuj tsis tshua muaj, feem ntau cov kev kho deg ntawm txheej txheej ntawm lub substrate yuav tsum tau ua kom lub zog saum npoo yog siab dua 38N / m. Hauv kev tshawb xav, kev kho tshuaj, kev kho mob corona, kev kho mob ozone, kev kho mob ultraviolet irradiation, kev kho cov nplaim hluav taws, kev kho ntshav thiab lwm txoj hauv kev tuaj yeem siv los kho qhov chaw ntawm lub hauv paus zaj duab xis, tab sis daim ntawv thov kev lag luam feem ntau yooj yim rau kev siv, tus nqi qis. , muaj txiaj ntsig zoo ntawm kev kho mob corona. Thaum lub hauv paus zaj duab xis raug rau kev kho mob corona, cov pawg polar nyob rau saum npoo ntawm lub hauv paus zaj duab xis tuaj yeem tau txais txiaj ntsig los ntawm oxidation cov tshuaj tiv thaiv thiab cov nplaim roughness tuaj yeem txhim kho qhov nro thiab txhim kho cov nplaum puag. Txawm li cas los xij, kev kho mob corona ntau dhau tuaj yeem ua rau cov txheej txheem ntawm lub hauv paus zaj duab xis puas thiab ua rau lub zog ntawm lub zog tsis muaj zog, ua rau txo qis ntawm cov nplaum nplaum. Yog li, qhov nro saum npoo tom qab kev kho mob corona feem ntau yog tswj nyob rau hauv thaj tsam ntawm 38 ~ 44N / m.
2. Siv cov primer
Substrate txheej yog hais txog txheej txheej ntawm lub substrate ua ntej txheej txheej nplaum, txheej txheej txheej los txhim kho qhov adhesion ntawm qhov chaw tiv thaiv zaj duab xis siab rhiab nplaum txheej thiab substrate (lub substrate txheej). Feem ntau siv cov nplaum nplaum yog: chlorinated polypropylene, oxidized polyethylene, cellulose derivatives, epoxy resin, polyamide resin, dej-soluble melamine resin, organic titanium compounds, thiab lwm yam. los ntawm tus choj no, lub substrate thiab cov nplaum yog txuas ruaj khov.
3. Stabilization ntawm stripping quab yuam
Tsis xav txog lub zog stabilization ntawm lub ntsej muag tiv thaiv zaj duab xis, tom qab txheej txheej ntawm cov khoom tiv thaiv, feem ntau nrog lub sijhawm dhau los, lub zog tev tawm yuav nce ntxiv, thaum lub sijhawm ua yeeb yaj kiab ntev, cov yeeb yaj kiab tiv thaiv. tsis tuaj yeem raug tshem tawm kom zoo, yog li cov yeeb yaj kiab tiv thaiv saum npoo yuav tsum tau muab tshem tawm quab yuam kom ruaj khov kho.
Tom qab lub stabilization ntawm lub tev tawm, lub tev lub zog ntawm lub ntsej muag tiv thaiv zaj duab xis tsis nce nrog kev loj hlob ntawm lub sij hawm txheej thaum siv (los yog lub tev quab yuam yog tswj nyob rau hauv ib tug tej yam ntau yam) los xyuas kom meej tias cov nto tiv thaiv zaj duab xis yog ib qho yooj yim. tev tawm ntawm qhov chaw ntawm cov khoom tiv thaiv thaum siv, thiab xyuas kom meej tias qhov chaw tiv thaiv zaj duab xis raug tshem tawm ntawm qhov chaw ntawm cov khoom tiv thaiv. Qhov saum npoo yog khaws cia kom huv si yam tsis muaj qhov seem ntawm cov nplaum nplaum. Piv txwv ntawm stabilization ntawm stripping quab yuam tuaj yeem muab tau raws li hauv qab no.
(1) Tensile kho ntawm nto tiv thaiv zaj duab xis
Nws tau hais tias nyob rau hauv kev tsim cov zaj duab xis tiv thaiv nto, tom qab lub substrate yog coated thiab qhuav, kev kho ob-directional stretching yog nqa tawm ua ntej winding, thiaj li hais tias cov khoom tiv thaiv zaj duab xis muaj 30% shrinkage tus nqi nyob rau hauv ntsug thiab kab rov tav kev taw qhia thaum rhuab rau 10min ntawm 100 ° C, thiab cov kev ntxhov siab sab hauv uas muaj nyob rau hauv thermal contraction ntawm cov yeeb yaj kiab tiv thaiv tuaj yeem raug offset tom qab cov yeeb yaj kiab tiv thaiv nto yog txuas rau saum npoo ntawm cov khoom tiv thaiv. Lub tev quab yuam yog nce los ntawm qhov kub thiab txias, lub sij hawm thiab lwm yam, yog li txhim kho qhov ruaj khov ntawm tev tawm ntawm qhov chaw tiv thaiv zaj duab xis.
(2) Ntxiv surfactant
Qhov sib ntxiv ntawm surfactants pab txhim kho kev ruaj ntseg ntawm lub zog ntawm lub cev tiv thaiv zaj duab xis, xws li surfactants, amine surfactants, organosilanes [xws li silicone (polysiloxane) roj, vinyl silane], ntxiv cov nyiaj tsim nyog ntawm phosphate esters thiab lawv cov derivatives rau cov kua nplaum. Txawm li cas los xij, nws yuav tsum raug sau tseg tias thaum siv cov yeeb yaj kiab tiv thaiv saum npoo ntawm qhov kub siab dua, cov khoom siv saum toj no muaj kev nyiam txav los ntawm cov roj hmab mus rau saum npoo thiab ua kom dej ntws tawm, yog li nws yuav tsum tau txiav txim siab siv perfluoroalkyl surfactants, xws li perfluoroalkyl. Carboxylate, perfluoroalkyl phosphate, perfluoroalkyl trimethylammonium ntsev, perfluoroalkyl trimethylammonium ethyl lactone. Lub mechanism ntawm kev txiav txim yog tias ib tug tsawg-zog txheej yog tsim nyob rau hauv lub interface ntawm cov ntaub ntawv tiv thaiv thiab tiv thaiv zaj duab xis nplaum txheej, uas inhibits kev loj hlob ntawm stripping quab yuam. Kuj tseem tuaj yeem ntxiv polyalkyl glycol fatty acid ester, xws li polyethylene glycol stearate, polyethylene glycol oleate, thiab lwm yam, lawv lub luag haujlwm yog los tsim cov txheej txheem txuas ntxiv los yog tsis tu ncua ntawm cov kua nplaum thiab cov khoom tiv thaiv; Qhov no tiv thaiv qhov nce ntawm lub zog tev tawm, thiab thaj tsam ntawm daim nyias nyias maj mam nce nrog qhov nce ntawm lub sijhawm tso kawm kom txog thaum nws nce mus txog tus nqi tas li.
(3) Ua kom lub siab rhiab nplaum nplaum me ntsis crosslinked
Ua ntej txheej los yog nyob rau hauv tus txheej txheem ntawm gluing, crosslinking tus neeg sawv cev yog ntxiv rau lub siab rhiab nplaum nplaum los txhim kho lub cohesion lub zog los ntawm nruab nrab cross-linking ntawm molecules, thiab txwv tsis pub lub peeling quab yuam nce nrog lub sij hawm.
