Adhesive khoom muaj ntau heev nyob rau hauv peb lub neej niaj hnub thiab nyob rau hauv industrial ntau lawm thiab yog siv nyob rau hauv ntau yam kev siv.
Cia peb saib cov nplaum los ntawm qhov pom ntawm ntau qhov kev tsis sib xws, uas yog tshwj xeeb rau cov khoom siv sib txawv thiab cov khoom siv substrates. Peb ntseeg tias tom qab nyeem tsab xov xwm no koj yuav nkag siab tob txog cov nplaum nplaum.
1. Ceev ceev
- Chav tsev
Qhov loj ntawm ib chav tsev ntim ntawm ib yam khoom yog hu ua qhov ntom ntawm cov khoom. Lub ntsiab chav nyob rau hauv International System ntawm Units yog kg / m³, thiab cov chav tsev ntawm peb cov khoom: g / ml.
- Kev ntsuas ceev thiab lub ntsiab lus
(1) Kev ntsuas txoj kev: density khob 5ml syringe (tsis yog tus qauv, tsuas yog siv)
(2) Qhov tseem ceeb: lub cev tsis tu ncua, tsis muaj qhov tshwj xeeb hauv cov nplaum hluav taws xob.
2. Viscosity
Lub ntsiab lus ntawm cov kua hauv qhov ntws, qhov xwm txheej ntawm kev sib txhuam sab hauv tsim ntawm nws cov molecules, hu ua viscosity ntawm cov kua, qhov loj ntawm cov viscosity qhia hauv viscosity. Cov kua dej los ntawm kev ua ntawm sab nraud quab yuam thiab cov txheeb ze txav ntawm cov kua molecules uas tsim los ntawm kev ua haujlwm, yog li cov kua tsis tuaj yeem nqa tawm ib qho kev sib tw, qhov loj ntawm qhov tsis kam yog hu ua viscosity. Viscosity muab faib ua dynamic viscosity thiab kinematic viscosity.
- dynamic viscosity yuav yog ob lub rooj tsavxwm nrog thaj tsam ntawm 1 square metres rau hauv cov kua, qhov kev ncua deb ntawm ob lub rooj tsavxwm rau 1 meters, yog tias koj ntxiv 1N ntawm kev ntxhov siab shear, kom tus txheeb ze tus nqi ntawm ob lub rooj tsavxwm rau 1m / s, ces viscosity ntawm cov kua yog 1Pa.s. Hauv International System of Units, chav tsev ntawm dynamic viscosity yog Pa.s, viscosity feem ntau hu ua dynamic viscosity.
- qhov txav ntawm viscosity fais fab viscosity thiab qhov ceev ntawm qhov sib piv ntawm qhov kub thiab txias, hais tias cov kua ntws hauv qab lub ntiajteb txawj nqus hauv kev ntsuas ntawm kev sib txhuam sab hauv; kua shear stress thiab shear rate ratio. Nws yog qhov ntsuas ntawm qhov tsis kam ntws ntawm cov kua dej hauv qab lub ntiajteb txawj nqus; Kinematic viscosity unit yog ㎡ / S.
3. Kho cov tshuaj tiv thaiv
Cov txheej txheem ntawm kev tau txais thiab txhim kho cov khoom xws li cov nplaum nplaum lub zog los ntawm cov tshuaj tiv thaiv (polymerization, cross-linking, thiab lwm yam). Kev kho yog cov txheej txheem tseem ceeb kom tau txais cov khoom sib txuas zoo, tsuas yog kho tag nrho, lub zog yuav yog qhov siab tshaj plaws.
Kev kho tuaj yeem muab faib ua thawj zaug kho, kho yooj yim, tom qab kho.
Nyob rau hauv tej yam kev mob kub, tom qab ib lub sij hawm ntawm lub sij hawm mus cuag ib tug tej yam lub zog, nto tau hardened, tsis nplaum, tab sis lub curing tsis xaus, lub sij hawm no yog hu ua thawj curing los yog gel. Tom qab ib lub sij hawm ntawm lub sij hawm, feem ntau ntawm cov tshuaj tiv thaiv pab pawg neeg mus koom nyob rau hauv cov tshuaj tiv thaiv, mus rau ib tug tej yam kev mob ntawm crosslinking, hu ua qhov yooj yim curing.
Tom qab kho yog txhawm rau txhim kho cov nplaum nplaum los yog vim qhov kev xav tau ntawm cov txheej txheem thiab cov txheej txheem kho yooj yim tom qab qhov sib txuas ntawm qhov kev kho mob. Feem ntau ntawm qhov kub thiab txias, khaws cia rau ib lub sijhawm, tuaj yeem ntxiv qhov kho kom zoo, ntxiv rau kev kho kom zoo, thiab tuaj yeem tshem tawm kev ntxhov siab sab hauv, txhim kho kev sib raug zoo. Txhawm rau kom tau txais cov nplaum nplaum zoo, cov txheej txheem kho yuav tsum tau ua raws li qhov tsim nyog. Curing tej yam kev mob muaj xws li kub, lub sij hawm, thiab lwm yam.
- Curing kub
Qhov kub ntawm cov nplaum reacts tshaj plaws. Adhesive curing yuav tsum muaj qhov kub thiab txias, tsuas yog sib txawv ntawm cov nplaum, qhov kub thiab txias yog txawv. Qhov kub thiab txias yog lub ntsiab tseem ceeb ntawm kev kho, tsis tsuas yog txiav txim siab txog qib ntawm kev ua tiav ntawm kev kho, tab sis kuj txiav txim siab qhov ceev ntawm cov txheej txheem kho. Tsim nyog nce qhov kub yuav ua kom cov txheej txheem kho kom zoo, tab sis kuj tuaj yeem txhim kho lub zog ntawm daim ntawv cog lus.
- Lub sijhawm kho
Hais txog qhov kub thiab txias, lub sijhawm ua kom cov nplaum yuav tsum tau ua. Qhov ntev ntawm lub sij hawm curing yog ze ze rau qhov curing kub. Ua kom qhov kub thiab txias tuaj yeem txo lub sijhawm kho, txo qhov kub thiab txias tuaj yeem tsim nyog kom ntev lub sijhawm kho. Txawm hais tias nws yog chav tsev kub curing los yog cua sov kho, yuav tsum xyuas kom meej tias lub sij hawm kho kom txaus los kho kom tiav, kom tau txais lub zog siab tshaj plaws.
Curing time graph (DSC test) gel lub sij hawm yog ib qho tseem ceeb siv cov ntaub ntawv los kawm txog kev kho cov kab mob ntawm cov nplaum, tuaj yeem siv los ua qhov kev sim ntawm kev ua tiav ntawm cov nplaum tiav, txhawm rau txheeb xyuas seb cov mis yog qhov yooj yim thiab yooj yim rau kev siv. !
- Kho tej yam kev mob
Curing kub, curing lub sij hawm, gel lub sij hawm ntsuas raws li ib tug siv.
4. Lub sijhawm khaws cia thiab lub sijhawm thov
- Lub sijhawm khaws cia
Hauv cov xwm txheej uas tau teev tseg, cov nplaum tseem tuaj yeem tuav nws txoj haujlwm ua haujlwm thiab xav tau lub cev thiab tshuaj lom neeg lub sijhawm ntev tshaj plaws. Feem ntau hais lus, yog tias qhov viscosity tsis hloov ntau thaum lub sijhawm khaws cia, nws qhov kev ua tau zoo yuav tsis muaj qhov hloov pauv zoo.
- Lub sijhawm siv tau (Lub neej lub lauj kaub)
Hauv cov xwm txheej uas tau teev tseg, cov nplaum tseem tuaj yeem tuav nws txoj haujlwm ua haujlwm thiab qhov xav tau ntawm lub cev thiab tshuaj lom neeg lub sijhawm ua haujlwm ntev tshaj plaws. Nyob rau hauv qhov zoo tagnrho, lub sij hawm tsim nyog yuav tsum tau txuam nrog lub sij hawm cia nyob rau hauv chav tsev kub, tab sis vim lub lag luam ntawm ib puag ncig kub thiab av noo vim li cas, tau ua hauj lwm nws tus kheej los ntawm ib co lwm yam (xws li shear thinning, tshav kub) thiab yog li ntawm qhov cuam tshuam ntawm lub sijhawm siv tau yuav ua rau lub sijhawm luv dua li kev khaws cia ntawm lub sijhawm ntawm chav tsev kub, cov nplaum liab los ntawm kev cuam tshuam ntawm qhov loj dua, lub sijhawm ua haujlwm tshwj xeeb yuav tsum tau simulated los txiav txim siab siv cov cov neeg siv khoom.
5. Shear zog
Tensile shear zog, adhesive tensile shear zog kuaj kuj yog feem ntau nqa tawm ntawm qhov kub thiab txias. Yog lub ntsiab adhesive bonding zog ntsuas.
- Nyob rau hauv daim ntawv nplaum lub taub hau xeem daim ntawm cov nplaum txheej los thov tensile shear load, mus rau kev sib koom ua ke ntawm kev puas tsuaj ntawm qhov siab tshaj plaws load, muab faib los ntawm tus nqi ntawm qhov chaw sib txuas.
- Uas yog, nyob rau hauv qhov kev txiav txim ntawm lub load thaum uas tig mus rau cov nplaum txheej, cov ntaub ntawv pov thawj kev puas tsuaj, chav tsev ntawm nplaum nto ntawm lub shear quab yuam endured, qhia nyob rau hauv MPa.
6. iav hloov kub
Kev hloov iav yog cov khoom siv amorphous polymer nruab nrab ntawm lub iav xeev thiab siab elasticity lub xeev hloov dua siab tshiab.
- Noj cov iav hloov kub raws li tus ciam teb, polymers nthuav tawm cov khoom sib txawv ntawm lub cev
- Hauv qab cov iav hloov pauv kub, cov polymers coj zoo li cov yas.
- Tshaj qhov kub hloov pauv iav, polymers coj zoo li roj hmab.
Adhesive ntau lawm kab qhia
Yog hais tias koj xav nyob rau hauv zus tau tej cov adhesives, los yog koj tab tom npaj khiav ib tug adhesive ntau lawm cog, koj muaj peev xwm tiv tauj peb txhua lub sij hawm, peb yuav muab koj cov kev pab cuam saw hlau. Nyem rau ntawm daim duab kom paub ntau ntxiv.
