Ni ubuhe bushyuhe bwikirahure (Tg) bwifu ya polymer isubirwamo?

Ubushyuhe bwikirahure (Tg) bwifu ya polymer ifu irashobora gutandukana bitewe na polymer yihariye. Ifu isubirwamo ya polymer isanzwe ikorwa muri polymers zitandukanye, harimo Ethylene-vinyl acetate (EVA), vinyl acetate-Ethylene (VAE), inzoga za polyvinyl (PVA), acrylics, nibindi. Buri polymer ifite Tg yihariye ya Tg, nubushyuhe aho polymer iva mubirahuri cyangwa bikomeye igahinduka rubberi cyangwa leta igaragara.

Tg ya pisitori ya polymer isubirwamo iterwa nibintu nka:

1. Ibikoresho bya Polymer: Polimeri zitandukanye zifite agaciro ka Tg zitandukanye. Kurugero, mubisanzwe EVA ifite Tg igera kuri -40 ° C kugeza kuri -20 ° C, mugihe VAE ishobora kuba ifite Tg igera kuri -15 ° C kugeza 5 ° C.
2. Inyongeramusaruro: Kwinjizamo inyongeramusaruro, nka plasitike cyangwa tackifiers, birashobora kugira ingaruka kuri Tg yifu ya polymer isubirwamo. Izi nyongeramusaruro zirashobora kugabanya Tg no kuzamura imiterere cyangwa imiterere.
3. Ingano ya Particle na Morphology: Ingano yingingo na morphologie yifu ya polymer isubirwamo irashobora kandi kugira ingaruka kuri Tg yabo. Ibice byiza birashobora kwerekana ibintu bitandukanye byubushyuhe ugereranije nibice binini.
4. Uburyo bwo gukora: Uburyo bwo gukora bukoreshwa mu gukora ifu ya polymer idasubirwaho, harimo uburyo bwo kumisha hamwe nintambwe nyuma yo kuvurwa, birashobora kugira ingaruka kuri Tg yibicuruzwa byanyuma.

Bitewe nibi bintu, nta gaciro kamwe ka Tg kumavuta yose ya polymer. Ahubwo, mubisanzwe ababikora batanga ibisobanuro hamwe nimpapuro zamakuru ya tekiniki zirimo amakuru ajyanye na polymer igizwe, urwego rwa Tg, nibindi bintu bijyanye nibicuruzwa byabo. Abakoresha ifu ya polymer isubirwamo bagomba gusuzuma izi nyandiko kubiciro byihariye bya Tg nandi makuru yingenzi ajyanye nibisabwa.