Kutheni Ilaphu le-PTFE elinobushushu obuphezulu liba lukhuni kwaye libe lukhuni emva kokusetyenziswa kwexesha elide kumaqondo obushushu aphezulu?

I-Jiangsu Aokai New Materials, umvelisi womthombo we-PTFE welaphu eliphezulu lobushushu, uchaza ukuqina kunye nokuqina kwelaphu le-PTFE lobushushu obuphezulu emva kwenkonzo yexesha elide lobushushu obuphezulu ukusuka kwiimbono ezintathu: i-polymer chain relaxation, cross-linking, kunye nokuthotywa . Kufuneka kuqatshelwe ukuba izinto ezingundoqo ze-PTFE zelaphu lobushushu obuphezulu yi-polytetrafluoroethylene (PTFE), kwaye uhlalutyo olulandelayo lujolise kwiinguqu ze-microstructural ze-PTFE yelaphu eliphezulu lobushushu.

I. Ukuphumla kweChayini yeMolekyuli (Ukuguga ngokwasemzimbeni)

Kwiqondo lokushisa eliphezulu, ukuhamba kwamaketanga eemolekyuli kwimimandla ye-amorphous ye-PTFE i-cloth ye-high-temperature iyanda, kwaye ngokuthe ngcembe iguqula ibe yi-crystalline state, ekhokelela kwi-crystallinity ephezulu. Le nkqubo yokuphumla kwekhonkco inciphisa ukuhamba kwamacandelo eemolekyuli kwilaphu le-PTFE elinobushushu obuphezulu, elibonakalisa ngokubonakalayo njengento eguqukayo ukusuka kwi-flexible ukuya kwi-brittle kunye ne-brittle.

II. Cross-Linking Reaction

Xa ilaphu PTFE high-ubushushu evezwe amaqondo aphezulu ixesha elide (ingakumbi kufutshane okanye ngaphaya umda inkonzo yayo ephezulu), phambi umkhondo ioksijini okanye radiation, iimolekyuli PTFE ulahlekelwa iiathom fluorine ukwenza radicals simahla, nto leyo ke ibangele intermolecular cross-linking. Inethiwekhi edityaniswe ngokunqamlezileyo ithintela ngokuthe ngqo ukutyibilika kwamatyathanga emolekyuli kwilaphu le-PTFE elinobushushu obuphezulu, libangela ukuba liphulukane nokuguquguquka. Esi sesinye sezizathu zekhemikhali ezingundoqo zokuqina kunye ne-embrittlement ye-PTFE yelaphu eliphezulu lobushushu.

III. Ukuthotywa Reaction

Kubushushu obuphezulu okanye kubukho be-oksijini, amatyathanga aphambili e-PTFE amalaphu aphezulu obushushu aphuka kwaye athobe, avelise amaqhekeza anobunzima bemolekyuli kunye nokukhupha iigesi ze-fluoride. Nangona izinto ezinokuthi zithambe ekuqaleni, ukuthotywa okuqhubekayo kukhokelela ekuhlahleni okubukhali kwisisindo se-molecular kunye nomonakalo kwisakhiwo sokuqala se-crystalline. Ekugqibeleni, umphezulu we-PTFE ubushushu obuphezulu belaphu umgubo, iintanda, kwaye ibonisa embrittlement olungenakujikwa.

Isishwankathelo : Xa ilaphu le-PTFE lobushushu obuphezulu lifudunyezwa ixesha elide, ukuphumla kwekhonkco (crystallization) kunye nokudibanisa okunqamlezayo kubangela ukuqina kunye nokulahlekelwa kokuqina; phantsi kweemeko ezimaxongo, ukuthotywa komgangatho kutshabalalisa ngakumbi imfezeko yesakhiwo. Indibaniselwano yale miba mithathu ekugqibeleni yenza ilaphu le-PTFE lobushushu obuphezulu libe lukhuni kwaye libe brittle.

Olu lwazi lungentla lunikwe nguJiangsu Aokai New Materials Technology Co., Ltd.

Ukuba unqwenela ukufunda ngakumbi malunga neeparitha ezineenkcukacha, iimeko zesicelo kunye nezisombululo ezilungelelanisiweyo zoluhlu olupheleleyo lwemveliso, kubandakanya i-PTFE ilaphu lobushushu obuphezulu, iteyiphu yobushushu obuphezulu be-PTFE, ibhanti elinobushushu obuphezulu be-PTFE, amabhanti angenamthungo oomatshini bokudibanisa, ilaphu le-PTFE elinamacala elinye, i-glass-high-high-temperature resistant Nceda uqhagamshelane nathi ngala majelo alandelayo:

·  I-Hotline yeNkonzo: Mnu Guo 18944819998

·  UMnu Liu 13705266308

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