Jiangsu Aokai New Materials, katswiri wopanga nsalu zotentha kwambiri za PTFE, amafotokoza za kusinthika kwa kapangidwe ka crystalline ka PTFE munthawi yonseyi ya nsalu ya PTFE yotentha kwambiri.
I. Kuwonongeka kwa Mapangidwe Oyambirira a Makristalo
2. Kusintha kwapangidwe panthawi yotentha kwa sintering
Kutentha kukakwera pamwamba pa malo osungunuka (~ 327 ° C), makhiristo onse amasungunuka. Unyolo wa mamolekyulu opindika amatseguka ndikumatula, kusandulika kukhala amorphous kusungunuka. Malire a tinthu oyambirira amatha ngati tinthu tating'onoting'ono timalowa mu gawo losungunuka losungunuka, ndikuphwanya dongosolo loyamba la granular crystalline.
II. Recrystallization pa Kuzizira
1. Kupanga mapangidwe a spherulitic
Ikazizira kuchokera kumalo osungunula, PTFE imadziwonetseranso mofulumira kupanga ma spherulites opangidwa ndi ma radially oriented folded-chain lamellae otuluka kunja kuchokera kumadera apakati a nucleation. Izi interpenetrating spherulites kumanga mosalekeza crystalline masanjidwewo, m'malo choyambirira ankanyamula tinthu dongosolo.
2. Kusiyanasiyana kwa crystallinity yomaliza
PTFE imakhala ndi unyolo wokhazikika, wokhazikika wa maselo, opereka makristali othamanga kwambiri ngakhale pozizira kwambiri. Chomaliza crystallinity zambiri ranges kuchokera 50% mpaka 70%, pang'ono otsika kuposa choyambirira emulsion particles.
III. Kusintha kwa Ma Crystalline Parameters ndi Mafomu a Crystal
1. Kusungidwa kwa gawo lokhazikika la kristalo
Pambuyo pozizira mpaka kutentha kwa chipinda, PTFE imakhala ndi dongosolo lokhazikika la hexagonal crystal (gawo la kutentha kwa chipinda cha hexagonal), lofanana ndi mawonekedwe ake a kristalo asanayambe. Kusintha konse kwamapangidwe kumachitika mu kukula kwa kristalo, ungwiro ndi morphology m'malo mwa gawo lomaliza la kristalo.
Kuzimitsa mwachangu kumabweretsa kutsika kwa crystallinity, kung'ambika bwino, ma spherulites opanda ungwiro, komanso kusinthasintha komanso kuwonetsetsa bwino kwa zinthu zomalizidwa. Kuzizira pang'onopang'ono ndi muyezo wa PTFE nsalu yotentha kwambiri kuti ikwaniritse zofunikira zamakina mphamvu.
IV. Interfacial Crystallization Effect pa Fiberglass ndi Kufunika Kwambiri
1. Transcrystallization phenomenon
Pamene PTFE imasungunuka pamtunda wa fiberglass, malo osungunuka a nucleation pamtunda wa fiber amapangitsa kuti transcrystallization: kristalo wa columnar amakula molunjika ku fiber axis, mosiyana kwambiri ndi morphology ya spherulite mkati mwa zokutira zambiri.
2. Kapangidwe ka gradient kuchokera ku mawonekedwe a ulusi kupita ku zokutira zambiri
Mothandizidwa ndi fiberglass, mawonekedwe a PTFE crystalline amapanga kusintha kwa gradient: wosanjikiza wozungulira moyandikana ndi ulusi pang'onopang'ono amasunthira kuzinthu zozungulira mkati mwa matrix opaka mkati.
3. Kukhudzidwa kwakukulu kwa kusintha kwapangidwe pa ntchito ya nsalu ya PTFE
Sintering imasintha makhiristo a PTFE opindika ang'onoang'ono: amasungunuka ndikuwonongeka, kenako amapangidwanso kukhala ma spherulites osalekeza (okhala ndi zigawo za interfacial transcrystalline). Izi zimatembenuza tinthu tating'ono ta ufa kukhala filimu yosasinthika, yomwe ndi yofunika kwambiri kuti ❖ kuyanika kuti apereke ntchito yokwanira kuphatikiza kukana kutentha, kugundana kochepa, katundu wopanda ndodo komanso kukana kwa dzimbiri.
Timalimbikitsa ukatswiri ndi kukhulupirika monga filosofi yathu yayikulu yamabizinesi, kupereka ndi mtima wonse mayankho amakampani omwe amasiyanitsidwa ndi makasitomala oganiza bwino kwa anzathu onse!
