Jiangsu Aokai New Materials, a ọkachamara emeputa nke PTFE elu-okpomọkụ ákwà, elaborates na evolushọn nke PTFE crystalline Ọdịdị n'oge sintering usoro nke PTFE elu-okpomọkụ ákwà.
I. Nbibi nke mbụ kristal Structure
1. PTFE crystalline morphology tupu sintering
Tupu sintering, PTFE dị ka achụsasịrị emulsion ahụ mmasị fiberglass ákwà. Ngwakọta nke ọ bụla nwere lamellae apịaji apịaji nke ukwuu nwere obere microcrystals ahaziri nke ọma.
2. Ngbanwe nhazi n'oge kpo oku maka sintering
Ozugbo okpomọkụ na-ebili n'elu ebe mgbaze (~ 327 ° C), kristal niile na-agbaze nke ọma. Agbụ ụmụ irighiri apịaji na-agbasa wee kewaa, na-agbanwe ka ọ bụrụ agbaze amorphous. Oke urughuru oke na-apụ n'anya ka ụmụ irighiri ihe na-abanye n'ime usoro mgbaze na-aga n'ihu, na-akụda ihe owuwu kristal mbụ granular kpamkpam.
II. Recrystallization n'oge oyi
1. Nhazi nke ihe owuwu spherulitic
Mgbe ọ jụrụ site na steeti a wụrụ awụ, PTFE ngwa ngwa recrystallizes ka ọ na-etolite spherulites nke nwere radially gbakwasara apịaji-chain lamellae gbatịpụrụ apụta site na etiti nucleation saịtị. Ndị a interpenetrating spherulites na-ewu a kristal matrix na-aga n'ihu, dochie mbụ urughuru Ọdịdị.
2. Mgbanwe na kristal ikpeazụ
PTFE nwere agbụ molekụla siri ike, nke ukwuu mgbe niile, na-ebuga ọnụego crystallization ngwa ngwa ọbụlagodi n'okpuru ngwa ngwa jụrụ oyi. kristal ikpeazụ n'ozuzu sitere na 50% ruo 70%, obere obere karịa nke ụmụ irighiri emulsion mbụ.
III. Evolution nke kristal Parameters na ụdị kristal
1. Njide nke kristal kwụsiri ike
Mgbe obi jụrụ na ọnụ ụlọ okpomọkụ, PTFE na-edobe sistemu kristal hexagonal kwụsiri ike (ọnụ ụlọ-okpomọkụ hexagonal agba), yiri ụdị kristal tupu-sintering ya. Ngbanwe nhazi niile na-eme n'ogo kristal, izu oke na ọdịdị ọdịdị karịa akụkụ kristal kacha.
2. Mmetụta nke ọnụego jụrụ oyi na kristal zuru oke
· Nji nwayọọ nwayọọ na-amịpụta kristal dị elu, spherulites buru ibu na nke siri ike karị, lamellae a na-akọwa nke ọma, na-ebute ngwaahịa nwere ike na njupụta dị elu.
Nkwụsị ngwa ngwa na-eduga na kristal dị ala, nke dị mma, spherulites na-adịchaghị mma, yana mgbanwe mgbanwe na ọkara nghọta nke ihe emechara. Ịdị nwayọọ nwayọọ bụ ọkọlọtọ maka akwa akwa okpomọkụ dị elu nke PTFE iji gboo ihe ike chọrọ.
IV. Mmetụta Crystallization Interface na Fiberglass yana mkpa zuru oke
1. Ihe omume transcrystallization
Mgbe PTFE gbazere cools na fiberglass na-ebupụta, nnukwu nucleation saịtị na eriri elu ime transcrystallization: a columnar kristal oyi akwa na-eto perpendicular na eriri axis, dị nnọọ iche na spherulite morphology n'ime nnukwu mkpuchi.
2. Gradient Ọdịdị si eriri interface na mkpuchi nnukwu
N'okpuru mmetụta nke fiberglass, PTFE crystalline Ọdịdị na-etolite a gradient mgbanwe: a transcrystalline oyi akwa n'akụkụ emep uta eri nke nta nke nta na-agbanwe na spherulitic owuwu na n'ime mkpuchi matrix.
3. Mkpebi mmetụta nke mgbanwe nhazi na arụmọrụ ákwà PTFE
Sintering na-agbanwe kristal PTFE granular apịaji-agbụ: ha na-agbaze na ndakpọ ihe, wee recrystallize ka ọ bụrụ na-aga n'ihu, nnukwu spherulites (ya na akwa transcrystalline interfacial). Nke a na-atọghata urughuru uzuzu na-adịghị mma ka ọ bụrụ ihe nkiri na-adịgide adịgide na-adịgide adịgide, nke bụ ihe dị mkpa dị mkpa maka mkpuchi ahụ iji wepụta arụmọrụ zuru oke gụnyere nguzogide okpomọkụ, obere esemokwu, ihe na-adịghị mma na mgbochi corrosion chemical.
Anyị na-akwado ọkachamara na iguzosi ike n'ezi ihe dị ka nkà ihe ọmụma azụmahịa anyị bụ isi, na-eji obi anyị dum na-enye ngwọta ụlọ ọrụ nkwụsịtụ na ọrụ ndị ahịa na-eche echiche maka ndị mmekọ niile!
