Jiangsu Aokai New Materials, si nye PTFE avɔ si me dzoxɔxɔ le ŋutɔ ƒe dɔwɔla bibi aɖe, ƒo nu tso PTFE kristalo ƒe wɔwɔme ƒe tɔtrɔ ŋu tsitotsito le PTFE avɔ si ƒe dzoxɔxɔ lolo ƒe sintering ƒe ɖoɖo bliboa me.
I. Kristmas ƒe Dɔwɔnu Gbãtɔ ƒe Tsɔtsrɔ̃
1. PTFE kristalo nɔnɔme hafi sintering
Hafi woawɔ sintering la, PTFE nɔa anyi abe emulsion ƒe akpa siwo kaka siwo lé ɖe fiberglass avɔ ŋu ene. Kɔsɔkɔsɔ siwo woxatsa siwo le abe kristalo ene ŋutɔ siwo me kristalo suesuesue siwo woɖo ɖe ɖoɖo nyui nu le la le nusue ɖesiaɖe me.
2. Xɔtuɖoɖo ƒe tɔtrɔ le dzoxɔxɔ me hena sintering
Ne dzoxɔxɔa nya dzi ɖe edzi wu afisi wòfa le (~327°C) ko la, kristaloawo katã ƒuna keŋkeŋ. Molekyulã kɔsɔkɔsɔ siwo woxatsa la ʋuna eye woɖea wo ɖa, eye wotrɔna zua nusi me nɔnɔme mele o. Nusuewo ƒe liƒo gbãtɔwo nu yina ne nusueawo va le ƒoƒom ɖe akpa si me tsi le si yia edzi, si gblẽa kristalo ƒe wɔwɔme si nye granular gbãtɔa me keŋkeŋ.
II. Recrystallization Le Fafaɣi
1. Sherulitic structures ƒe wɔwɔme
Ne PTFE fa tso nɔnɔme si me wòfa me la, egatrɔna kabakaba tsɔ wɔa spherulites siwo me kɔsɔkɔsɔ siwo woxatsa ƒe lamellae siwo le dzogoe ene me siwo kekena yia gota tso titina nucleation teƒewo. Spherulite siawo siwo gena ɖe wo nɔewo me la tua kristalo-matrix si yia edzi ɖaa, eye wòxɔa nusuekpɔmɔ̃ gbãtɔ si wobla ɖe agba me la teƒe.
2. Vovototo le kristalo mamlɛtɔ me
PTFE ƒe molecule ƒe kɔsɔkɔsɔ sesẽ siwo nɔa anyi ɖaa ŋutɔ, siwo naa kristalo ƒe tsɔtsɔme kabakaba ŋutɔ le fafa kabakaba vie gɔ̃ hã me. Zi geɖe la, kristalo mamlɛtɔ nɔa 50% va ɖo 70%, si bɔbɔ vie wu emulsion ƒe akpa gbãtɔawo tɔ.
III. Kristmas ƒe Nɔnɔmewo Kple Kristmas ƒe Nɔnɔmewo ƒe Nɔnɔmetɔtrɔ
1. Krystal ƒe akpa si li ke ƒe léle ɖe asi
Ne PTFE fa ɖe xɔme ƒe dzoxɔxɔ dzi vɔ la, eléa kristalo ƒe ɖoɖo si li ke (xɔme ƒe dzoxɔxɔ ƒe dzogoe ade ƒe akpa) me ɖe asi, si sɔ kple eƒe kristalo ƒe nɔnɔme si nɔ anyi do ŋgɔ na sintering. Xɔtuɖoɖo ƒe tɔtrɔwo katã dzɔna le kristalo ƒe lolome, blibodede kple nɔnɔme me tsɔ wu kristalo ƒe akpa mamlɛtɔ.
· Fafa blewu naa kristalo si lolo wu, spherulites lolo wu kple lamellae siwo le kpekpem wu, siwo me kɔ nyuie wu, si wɔnɛ be wokpɔa nusiwo ƒe sesẽme kple kpekpeme dzina ɖe edzi.
· Ne wotsi kabakaba la, enaa kristalo ƒe nɔnɔme ɖiɖina vie, spherulites siwo le nyuie wu, siwo mede blibo o, eye nusi wowɔ vɔ la te ŋu trɔna ɖe nɔnɔmewo ŋu nyuie wu eye wòdzena afã kple afã. Fafa blewu nye dzidzenu na PTFE avɔ si ƒe dzoxɔxɔ lolo be wòawɔ ɖe mɔ̃ ƒe ŋusẽ ƒe nudidiwo dzi.
IV. Interfacial Crystallization Ŋusẽkpɔɖeamedzi ɖe Fiberglass kple Vevienyenye Bliboa Dzi
1. Transcrystallization nudzɔdzɔ
Ne PTFE ƒe ʋeʋẽ fa ɖe fiberglass ƒe anyigba dzi la, nucleation teƒe siwo le ʋeʋẽm le fiber ƒe anyigba dzi hea transcrystallization vɛ: sɔti ƒe kristalo ƒe ƒuƒoƒo tsina le tsitre ɖe fiber axis ŋu, si to vovo kura tso spherulite ƒe nɔnɔme si le bulk coating la me gbɔ.
Le fiberglass ƒe ŋusẽkpɔɖeamedzi te la, PTFE ƒe kristalo ƒe wɔwɔme wɔa tɔtrɔ si le ʋuʋum: kristalo ƒe ƒuƒoƒo si te ɖe ka ŋu la trɔna vivivi zua spherulitic xɔtuɖoɖo siwo le ememe nutsyɔnu ƒe matriki la me.
Sintering trɔa granular folded-chain PTFE kristalo: wotoa ʋeʋẽ kple xɔtuɖoɖo ƒe gbagbã me, emegbe wogbugbɔa kristalo zua spherulites siwo yia edzi, siwo le ʋeʋẽm (kple interfacial transcrystalline layers). Esia trɔa aŋɔ ƒe akpa siwo le gbadzaa siwo wobla ɖe agba me la wozua film si me gblẽ o si yia edzi, si nye nudidi vevi si hiã hafi nusi wotsɔ blae la nawɔ dɔ bliboe si me dzoxɔxɔ ƒe tsitretsitsi, ʋuʋudedi sue, nɔnɔme si meléna ɖe nu ŋu o kple atikewo ƒe xɔxlɔ̃ ƒe tsitretsitsi le.
