Menene zafin canjin gilashi (Tg) na foda polymer mai sake wargajewa?

Zafin canjin gilashi (Tg) na foda polymer mai sake fashewa na iya bambanta dangane da takamaiman abun da ke ciki da tsari na polymer. Ana ƙera foda polymer mai sake fashewa yawanci daga polymers daban-daban, gami da ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), polyvinyl alcohol (PVA), acrylics, da sauransu. Kowane polymer yana da nasa Tg na musamman, wanda shine zafin da polymer ke canzawa daga yanayin gilashi ko tauri zuwa yanayin roba ko viscous.

Tg na foda polymer mai sake narkewa yana da tasiri ta hanyar abubuwa kamar:

1. Tsarin Polymer: Polymers daban-daban suna da ƙimar Tg daban-daban. Misali, EVA yawanci yana da kewayon Tg tsakanin -40°C zuwa -20°C, yayin da VAE na iya samun kewayon Tg tsakanin -15°C zuwa 5°C.
2. Ƙarin Abinci: Haɗa ƙarin abinci, kamar su robobi ko tackifiers, na iya shafar Tg na foda polymer da za a iya sake rarrabawa. Waɗannan ƙarin abinci na iya rage Tg kuma su haɓaka sassauci ko halayen mannewa.
3. Girman Barbashi da Tsarin Halitta: Girman barbashi da yanayin fatar polymer mai sake wargajewa suma suna iya yin tasiri ga Tg ɗinsu. Ƙananan barbashi na iya nuna halayen zafi daban-daban idan aka kwatanta da manyan barbashi.
4. Tsarin Masana'antu: Tsarin masana'anta da ake amfani da shi don samar da foda na polymer mai sake wargajewa, gami da hanyoyin bushewa da matakan bayan magani, na iya yin tasiri ga Tg na samfurin ƙarshe.

Saboda waɗannan dalilai, babu wani ƙimar Tg guda ɗaya ga duk foda na polymer da za a iya sake rarrabawa. Madadin haka, masana'antun galibi suna ba da takamaiman bayanai da takaddun bayanai na fasaha waɗanda suka haɗa da bayanai game da abun da ke cikin polymer, kewayon Tg, da sauran kaddarorin samfuransu masu dacewa. Masu amfani da foda na polymer da za a sake rarrabawa ya kamata su tuntuɓi waɗannan takardu don takamaiman ƙimar Tg da sauran mahimman bayanai da suka shafi aikace-aikacen su.