Muaj nuj nqi thiab mechanism ntawm adhesion txhawb

Feem ntau adhesion promoters muaj plaub hom kev ua. Txhua tus muaj qhov sib txawv thiab kev ua haujlwm.

Muaj nuj nqi

Mechanism

Txhim kho mechanical bonding

Los ntawm kev txhim kho cov permeability thiab wettability ntawm txheej rau lub substrate, lub txheej yuav nkag mus rau hauv lub pores thiab tawg ntawm lub substrate kom ntau li ntau tau. Tom qab solidification, suav tsis txheeb me anchors yog tsim los tuav lub substrate, yog li txhim kho cov adhesion ntawm txheej zaj duab xis rau lub substrate.

Txhim kho Van Der Waals quab yuam

Raws li kev suav, thaum qhov kev ncua deb ntawm ob lub dav hlau yog 1 nm, van der Waals quab yuam tuaj yeem ncav cuag 9.81 ~ 98.1 MPa. Los ntawm kev txhim kho lub wettability ntawm txheej rau lub substrate, lub txheej tuaj yeem wetted kom tiav raws li qhov ua tau thiab ze rau lub substrate nto ua ntej kho, yog li ua kom lub zog ntawm van der Waals thiab thaum kawg txhim kho qhov adhesion ntawm txheej zaj duab xis rau substrate.

Muab cov pab pawg reactive thiab tsim tej yam kev mob rau kev tsim cov hydrogen bonds thiab tshuaj bonds

Lub zog ntawm hydrogen bonds thiab chemical bonds muaj zog ntau dua li ntawm van der Waals rog. Adhesion txhawb nqa xws li resins thiab coupling agents muab cov pab pawg reactive xws li amino, hydroxyl, carboxyl lossis lwm pab pawg neeg nquag, uas tuaj yeem tsim hydrogen bonds lossis tshuaj bonds nrog oxygen atoms lossis hydroxyl pawg ntawm cov substrate, yog li txhim kho adhesion.

Diffusion

Thaum cov coated substrate yog cov khoom siv polymer, muaj zog hnyav lossis chlorinated polyolefin resin adhesion txhawb nqa tuaj yeem siv. Nws tuaj yeem txhawb kev sib koom ua ke thiab kev sib cais ntawm cov txheej txheem thiab cov txheej txheem substrate, thaum kawg ua rau lub interface ploj mus, yog li txhim kho qhov adhesion ntawm txheej zaj duab xis thiab substrate.


Lub sij hawm xa tuaj: Mar-31-2025