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 pamene tinthu tating'onoting'ono timaphatikizana mu gawo losungunuka losungunuka, ndikuphwanya dongosolo loyamba la granular crystalline.
II. Recrystallization pa Kuzizira
1. Kupanga mapangidwe a spherulitic
Ikazizira kuchokera ku chitsulo chosungunuka, PTFE imakonzanso mwachangu kupanga ma spherulites opangidwa ndi unyolo wopindika wopindika wotuluka kuchokera pakatikati pa nucleation. Izi interpenetrating spherulites kumanga mosalekeza crystalline masanjidwewo, m'malo choyambirira ankanyamula tinthu dongosolo.
2. Kusiyanasiyana kwa crystallinity yomaliza
PTFE imakhala yolimba, unyolo wanthawi zonse wa mamolekyulu, opereka makristali othamanga kwambiri ngakhale pozizira kwambiri. The crystallinity chomaliza zambiri ranges ku 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 yokhazikika ya hexagonal crystal system (gawo la kutentha kwa chipinda cha hexagonal), mofanana 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 kuwonekera 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 pazitsulo za fiberglass, malo osungunuka a nucleation pamtundu wa fiber amapangitsa kuti transcrystallization: kristalo wa columnar amakula molingana ndi 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 magalasi a fiberglass, mawonekedwe a PTFE crystalline amapanga kusintha kwa gradient: wosanjikiza wozungulira moyandikana ndi ulusi pang'onopang'ono umasinthira kukhala spherulitic mapangidwe mkati mwa zokutira matrix.
3. Kukhudzidwa kwakukulu kwa kusintha kwapangidwe pa ntchito ya nsalu ya PTFE
Sintering imasintha makhiristo a PTFE opindika pang'ono: amasungunuka ndikuwonongeka, kenako amapangidwanso kukhala ma spherulites osalekeza (wokhala ndi zigawo zowoneka bwino). Izi zimatembenuza tinthu tating'ono ta ufa kukhala filimu yosasunthika, yomwe ndi yofunika kwambiri kuti ❖ kuyanika kuti apereke ntchito zonse kuphatikizapo kukana kutentha, kugundana kochepa, katundu wosagwira 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!
