Lithini iqondo lobushushu leglasi-lotshintsho (Tg) lwepolymer powders eziphinda zihlakazwe?

Iqondo lokushisa kweglasi-transition (Tg) yepolymer powders enokuphinda ihlakazwe inokwahluka ngokuxhomekeka kwi-polymer ethile kunye nokuqulunqwa.Iipolymer powders ezinokuphinda zenziwe zivela kwiipolymers ezahlukeneyo, kubandakanya i-ethylene-vinyl acetate (EVA), i-vinyl acetate-ethylene (VAE), i-polyvinyl alcohol (PVA), i-acrylics, kunye nabanye.I-polymer nganye ine-Tg yayo ekhethekileyo, iqondo lokushisa apho i-polymer iguqulela ukusuka kwiglasi okanye imeko eqinile ukuya kwi-rubbery okanye i-viscous state.

I-Tg ye-polymer powders enokuphinda ihlakazwe iphenjelelwa zizinto ezifana nezi:

1. Ukubunjwa kwePolymer: Iipolima ezahlukeneyo zinexabiso leTg ezahlukeneyo.Umzekelo, i-EVA ngokuqhelekileyo inoluhlu lwe-Tg olujikeleze -40 ° C ukuya -20 ° C, ngelixa i-VAE ingaba noluhlu lwe-Tg malunga no -15 ° C ukuya ku-5 ° C.
2. Izongezo: Ukufakwa kwezongezelelo, ezifana neplastiki okanye i-tackifiers, kunokuchaphazela i-Tg ye-polymer powders ephinda iphinde iphindeke.Ezi zongezo zinokuthoba i-Tg kunye nokuphucula ukuguquguquka okanye iimpawu zokubambelela.
3. Ubungakanani beNcam kunye ne-Morphology: Ubungakanani besuntswana kunye ne-morphology ye-polymer powders ephinda iphindwe kwakhona inokuchaphazela i-Tg yabo.Amasuntswana acwebileyo angabonisa iimpawu ezahlukeneyo zobushushu xa kuthelekiswa namasuntswana amakhulu.
4. Inkqubo yokuvelisa: Inkqubo yokuvelisa esetyenziselwa ukuvelisa i-polymer powders ephindwe kabini, kuquka iindlela zokumisa kunye namanyathelo emva kokunyanga, inokuchaphazela i-Tg yemveliso yokugqibela.

Ngenxa yezi zinto, akukho xabiso elinye leTg kuzo zonke iipolymer powders eziphinda zihlakazwe.Endaweni yoko, abavelisi babonelela ngeenkcukacha kunye namaphepha edatha yobugcisa abandakanya ulwazi malunga nokwakheka kwepolymer, uluhlu lweTg, kunye nezinye iipropathi ezifanelekileyo zeemveliso zabo.Abasebenzisi bepolymer powders ezinokuphinda bahlakaniswe kufuneka bajonge la maxwebhu kumaxabiso athile e-Tg kunye nolunye ulwazi olubalulekileyo olunxulumene nezicelo zabo.