Gịnị bụ iko mgbanwe okpomọkụ (Tg) nke redispersible polymer powders?

Okpomọkụ iko-ngbanwe (Tg) nke polymer powders nwere ike ịdịgasị iche dabere na ihe mejupụtara polymer na nhazi. A na-arụpụtakarị powders polymer redispersible site na polymers dị iche iche, gụnyere ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), mmanya polyvinyl (PVA), acrylics, na ndị ọzọ. Onye ọ bụla polymer nwere Tg pụrụ iche, nke bụ okpomọkụ nke polymer na-esi na ọnọdụ enyo ma ọ bụ nke siri ike gaa na rubbery ma ọ bụ viscous steeti.

A na-emetụta Tg nke powders polymer redispersible site na ihe ndị dị ka:

1. Ihe mejupụtara polymer: polymers dị iche iche nwere ụkpụrụ Tg dị iche iche. Dịka ọmụmaatụ, EVA na-enwekarị Tg gburugburu -40°C ruo -20°C, ebe VAE nwere ike inwe oke Tg nke ihe dịka -15°C ruo 5°C.
2. Ihe mgbakwunye: Ntinye nke ihe mgbakwunye, dị ka plasticizers ma ọ bụ tackifiers, nwere ike imetụta Tg nke polymer powders redispersible. Ihe mgbakwunye ndị a nwere ike wedata Tg ma kwalite mgbanwe ma ọ bụ ihe nrapado.
3. Oke urughuru na usoro ọmụmụ: nha nha na morphology nke powders polymer redispersible nwekwara ike imetụta Tg ha. Ụmụ irighiri ihe ndị dị mma nwere ike igosipụta njirimara ọkụ dị iche iche ma e jiri ya tụnyere ụmụ irighiri ihe buru ibu.
4. Usoro nrụpụta: Usoro mmepụta ihe eji emepụta powders polymer redisspersible, gụnyere ụzọ ihicha na usoro ọgwụgwọ post, nwere ike imetụta Tg nke ngwaahịa ikpeazụ.

N'ihi ihe ndị a, ọ dịghị otu Tg uru maka ihe niile na-emegharị polymer powders. Kama nke ahụ, ndị na-emepụta ihe na-enye nkọwapụta na mpempe data teknụzụ na-agụnye ozi gbasara ihe mejupụtara polymer, oke Tg na ihe ndị ọzọ dị mkpa nke ngwaahịa ha. Ndị na-eji powders polymer redispers kwesịrị ịkpọtụrụ akwụkwọ ndị a maka ụkpụrụ Tg akọwapụtara na ozi ndị ọzọ dị mkpa metụtara ngwa ha.