Qib kev faib tawm cov lus piav qhia ntawm epoxy resin rwb thaiv tsev pawg thawj coj saib

Epoxy resins feem ntau xa mus rau cov organic polymer sib txuas uas muaj ob lossis ntau pawg epoxy hauv cov qauv. Tsuas yog qee qhov, lawv cov txheeb ze molecular tsis siab. Cov qauv txheej txheem ntawm epoxy resin yog tus yam ntxwv los ntawm cov pab pawg epoxy nquag hauv cov saw molecular. Cov pab pawg epoxy tuaj yeem nyob ntawm qhov kawg, hauv nruab nrab lossis hauv cov qauv sib txawv ntawm cov saw hlau. Vim tias cov qauv txheej txheem muaj cov pab pawg epoxy nquag, lawv tuaj yeem hla kev sib txuas sib cuam tshuam nrog ntau hom kev kho tus neeg sawv cev kom tsim tau cov tshuaj yaj yeeb uas tsis yaj thiab infusible nrog peb txoj hauv kev network.

Daim ntawv thov cov yam ntxwv ntawm epoxy resin rwb thaiv tsev pawg thawj coj saib

1. Ntau hom ntawv. Ntau yam resins, kho tus neeg sawv cev, thiab hloov kho cov txheej txheem tuaj yeem hloov kho kom tau raws li qhov xav tau ntawm ntau daim ntawv thov ntawm daim ntawv, thiab qhov ntau tuaj yeem yog los ntawm qis viscosity mus rau qhov siab melting point khib nyiab.

2. Yooj yim kho. Xaiv ntau yam sib txawv ntawm cov neeg sawv cev kho kab mob, cov txheej txheem epoxy tuaj yeem yuav luag tau kho hauv qhov kub ntawm 0 ~ 180 ℃.

3. Muaj zog nplaum. Cov pab pawg hydroxyl ncov qaumteb qabteb thiab cov ether bonds hauv cov saw hlau molecular ntawm epoxy resins ua rau nws nplaum rau ntau yam tshuaj. Kev nqaim ntawm epoxy resin yog qis thaum kho, thiab kev nyuab siab sab hauv tsim tawm me me, uas tseem pab txhim kho lub zog ua kom khov.

4. Tsawg shrinkage. Cov tshuaj tiv thaiv ntawm cov tshuaj epoxy cob thiab cov tshuaj tua kab siv yog ua los ntawm cov tshuaj tiv thaiv ncaj qha ntxiv lossis lub nplhaib-qhib polymerization cov tshuaj tiv thaiv ntawm epoxy pawg hauv cov tshuaj molecule, thiab tsis muaj dej lossis lwm yam khoom hloov pauv tau tso tawm. Piv nrog cov polyester tsis txaus satin thiab cov phenolic resins, lawv qhia qis qis qis (tsawg dua 2%) thaum kho.

5. Cov khoom siv dag zog. Cov txheej txheem kho epoxy resin muaj cov cuab yeej zoo heev.

6. Kev ua haujlwm hluav taws xob. Cov txheej txheem kho epoxy resin yog cov khoom siv zoo heev uas muaj cov khoom siv hluav taws xob zoo, tiv thaiv kom tsis txhob xau, thiab tiv taus arc.

7. Tshuaj ruaj ntseg. Feem ntau, cov txheej txheem kho epoxy resin tau zoo heev alkali tsis kam, kua qaub tsis kam thiab hnyav hnyav. Zoo li lwm yam khoom ntawm cov txheej txheem kho epoxy, cov tshuaj lom neeg ruaj khov kuj tseem nyob ntawm cov tshuaj uas tau xaiv thiab kho tus neeg sawv cev. Kev xaiv tsim nyog ntawm epoxy resin thiab tus neeg sawv cev tua tuaj yeem ua rau nws muaj tshuaj lom tshwj xeeb ruaj khov.

8. Qhov ruaj khov. Kev sib xyaw ua ke ntawm ntau yam ntawm cov khoom saum toj no muab cov txheej txheem epoxy cob rau qhov muaj qhov ruaj khov thiab ruaj khov.

9. Tiv taus pwm. Cov txheej txheem kho epoxy cob yog tiv taus rau cov pwm feem ntau thiab tuaj yeem siv rau hauv cov huab cua hnyav.

Hom kev faib tawm

Raws li cov qauv txheej txheem, epoxy resins tuaj yeem faib ua tsib pawg:

1. Glycidyl ether epoxy cob

2. Glycidyl ester epoxy resin

3. Glycidylamine epoxy cob

4. Tawm aliphatic epoxy cob

5. Alicyclic epoxy cob