Ku barayaa sida loo doorto wakiilka daaweynta resin epoxy?

Wakiilka daaweynta epoxy waa walax kiimiko ah oo loo isticmaalo in lagu daaweeyoresins epoxy ahiyadoo si kiimiko ah ula falgasha kooxaha epoxy-ga ee ku jira epoxy-ga si loo sameeyo qaab-dhismeed isku xiran, sidaas darteedna resin-ka epoxy-ga ka dhigaya walxo adag oo adag oo waara.
Doorka ugu muhiimsan ee wakiilada daaweynta epoxy waa in la xoojiyo adkaanta, iska caabbinta xoqidda, iyo iska caabbinta kiimikada ee resins-ka epoxy, taasoo ka dhigaysa walxo waara oo waara, taas oo qayb muhiim ah ka ah isku-dhafka epoxy ee la shiiday. Maqaalkani wuxuu wadaagayaa sida loo doorto wakiilka daaweynta epoxy-ga saxda ah iyadoo lagu saleynayo arrimo kala duwan:
Sida waafaqsan xaaladaha daaweynta
- Ku daaweynta heerkulka qolka: Haddii si degdeg ah loogu daaweeyo heerkulka qolka, wakiilada daaweynta aliphatic amine sida ethylenediamine iyo diethylenetriamine ayaa la dooran karaa; haddii xawaaraha daaweynta aan loo baahnayn inuu sarreeyo, oo diiradda la saaro waqtiga hawlgalka, wakiilada daaweynta polyamide ayaa la dooran karaa.
- Daawaynta kulaylka: Si loo helo iska caabbinta kulaylka sare iyo sifooyinka farsamada, wakiilada daawaynta amine-ka udgoonka leh, sida diaminodiphenylsulfone (DDS), iwm., ayaa loo isticmaali karaa; daawaynta degdega ah ee heerkulka hooseeya, wakiilada daawaynta amine-ka ee wax laga beddelay oo leh dardar-geliyeyaal ayaa la tixgelin karaa.
- Daaweynta xaaladaha gaarka ah: si loogu daaweeyo jawi qoyan, waxaa la dooran karaa wakiil daaweyn qoyan; nidaam daaweyn fudud, wakiil daaweyn oo leh sawir-qaadis iyo epoxy acrylate.
Sida waafaqsan shuruudaha waxqabadka
- Sifooyinka farsamada: haddii loo baahdo adkeysi sare iyo xoog sare, wakiilada daaweynta anhydride waa la dooran karaa; haddii loo baahdo dabacsanaan wanaagsan iyo iska caabin saameyn, wakiilada daaweynta adkaanta sida caagga polysulfide ayaa ku habboon.
- Iska caabbinta kiimikada: shuruudaha sare ee iska caabbinta aashitada, alkali, iyo dareeraha,resin fenolik ahwakiilka daaweynta ama wakiilka daaweynta amine ee wax laga beddelay ayaa ku habboon.
- Iska caabbinta kulaylka: Deegaannada heerkulka sare leh, sida ka sarreeya 200℃, waxaa la tixgelin karaa wakiil silikoon ah ama wakiil daaweyn oo leh qaab-dhismeed polyaromatic ah.
Sida waafaqsan jawiga isticmaalka
- Deegaanka gudaha: shuruudaha ilaalinta deegaanka oo sarreeya, wakiilka daaweynta epoxy ee ku salaysan biyaha ama wakiilka daaweynta aliphatic amine ee kacsan oo hooseeya ayaa ku habboon.
- Deegaanka dibadda: waxaa loo baahan yahay iska caabin cimilo oo wanaagsan, wakiilada daaweynta alicyclic amine ee leh iska caabin wanaagsan oo UV ah ayaa ku habboon.
- Deegaanno gaar ah: Deegaannada leh shuruudaha nadaafadda sare sida cuntada iyo daawada, wakiilada daaweynta epoxy ee aan sun ahayn ama sun yar sida wakiilada daaweynta polyamide ee badbaadada cuntada haysta ayaa loo baahan yahay in la doorto.
Ka fiirso shuruudaha habka
- Waqtiga hawlgalka: Muddada qalliinka dheer, dooro wakiil daawayn qarsoon, sida dicyandiamide, iwm. Qalliinka gaaban iyo waqtiga daawaynta, dooro wakiilka daawayn aliphatic amine oo si dhakhso ah u bogsanaya.
- Muuqaalka Daaweynta: Si aad u hesho muuqaal daaweyn midab la'aan ah oo hufan, dooro wakiilada daaweynta amine-ka alicyclic, iwm. Wixii shuruudo midab hooseeya, dooro wakiilada daaweynta amine-ka guud ee qiimaha jaban.
Marka lagu daro qodobka kharashka
- Iyada oo la raacayo shuruudaha waxqabadka, isbarbardhig qiimaha iyo qiyaasta wakiilada daaweynta kala duwan. Qiimaha wakiilada daaweynta amine-ka ee caadiga ah waa mid hooseeya, halka qaar ka mid ah wakiilada daaweynta waxqabadka gaarka ah sida wakiilada daaweynta fluorine-ka iyo kuwa daaweynta silicone-ka ay qaali yihiin.