Hobaneng ha Teipi ea PTFE e ka Boloka Momahano oa Eona Ntle le ho Se hloleha Libakeng tse Mocheso o Phahameng?

Theipi ea PTFE e phahameng ea mocheso e hlahisoang ke Jiangsu Aokai New Materials e sebelisa sekhomaretsi sa silicone se nang le khatello, se ka sebetsang ka mokhoa o tsitsitseng ho 250 ° C ka nako e telele. Mabaka a motheo a itšetlehile ka lintlha tse tharo tse latelang:

1. Ketane e ka Sehloohong e na le Li-Bond tsa Si–O tse nang le Mocheso o Phahameng oa ho Oa ha Thermal

Ketane e ka sehloohong ea limolek'hule ea sekhomaretsi sa silicone se nang le khatello ea maikutlo ka har'a tepi ea mocheso o phahameng oa PTFE e na le sebopeho sa Si O Si O. Matla a bond a Si-O bond a batla a le 445 kJ/mol, a phahame haholo ho feta a C–C bond (hoo e ka bang 348 kJ/mol) kapa C–H bond (hoo e ka bang 413 kJ/mol) ka lipolymer tse tloaelehileng tse kang li-acrylate le liraba.

Lithempereichara tse phahameng, li-bond tsa C-C li robeha habonolo le ho baka ho senyeha ha ketane, athe li-bond tsa Si-O li hloka matla a mangata haholo hore li qhome. Ka hona, ketane e kholo ea limolek'hule ea silicone PSA e lula e tiile ho 250 ° C, ho qoba tahlehelo ea ho khomarela e bakoang ke ho senyeha ha mocheso oa mocheso.

2. Chemical Cross-Linking Network e Thibela ho Kolofala le ho Phalla ka Mocheso o Phahameng

Rabara ea silicone e sa amaneng e fetoha mokelikeli oa viscous ka mocheso o phahameng 'me e lahleheloa ke matla a momahano ka botlalo. Leha ho le joalo, Silicone PSA ka PTFE theipi phahameng-thempereichara e crosslinked ka peroxide crosslinking kapa platinum-catalyzed tlatsetso crosslinking, hokela linear diketane limolek'hule ka netweke e tsitsitseng mahlakore a mararo.

Sebopeho sena se kopantsoeng se lumella lera la sekhomaretsi hore le boloke boitšoaro bo tiileng ba 250 ° C ntle le ho qhibiliha kapa ho phalla joaloka thepa ea thermoplastic. Le ha modulus e fokotsehile hanyane, e ntse e boloka matla a lekaneng a momahano ho hanela peeling.

3. Mocheso o Tlase oa Phetoho ea Khalase (Tg ~ −120°C)

Silicone PSA ka PTFE theipi e phahameng ea mocheso e na le Tg e tlase haholo (hoo e ka bang −120 ° C), e bolelang hore liketane tsa eona tsa molek'hule li lula li le boemong bo tsitsitseng haholo ho pholletsa le mocheso o pharaletseng ho tloha -70 ° C ho ea ho 300 ° C, ho e-na le boemo ba khalase e brittle.

Ka hona, mochesong o phahameng, lera la sekhomaretsi ha le thatafale ho lahleheloa ke matla a ho kolobisa kapa hona ho nolofatsa ho phalla ho feteletseng. E boloka modulus e itekanetseng (modulus ea polokelo G' ≈ 10⁴–10⁶ Pa), e leng fensetere e nepahetseng bakeng sa ho khomarela khatello.

Silicone PSA ka boeona e na le matla a tlaase a holim'a metsi (a pota-potileng 22 mN / m), e leng se nolofalletsang ho kolobisa li-substrates tse tlaase-tlase tse kang PTFE le rabara ea silicone hantle esita le mocheso o phahameng - ho thibela ho arohana ho bakoang ke ho lumellana ha matla a holim'a metsi.

Lintlha tse kaholimo li fanoe ke Jiangsu Aokai New Materials Technology Co., Ltd.

Bakeng sa lintlha tse qaqileng, maemo a ts'ebeliso le litharollo tse ikhethileng tsa lihlahisoa tsa rona tse felletseng - ho kenyeletsoa lesela la mocheso o phahameng oa PTFE, tepi ea mocheso o phahameng oa PTFE, lebanta le nang le mocheso o phahameng oa mocheso oa PTFE, lebanta le se nang mochini bakeng sa mechini ea ho hlapela, lesela le nang le lehlakore le le leng la PTFE, lesela le nang le mocheso o phahameng oa mocheso le lesela le nang le mocheso o phahameng ka kopo -

·  Mohala oa Ts'ebeletso: Mong. Guo 18944819998 Monghali Liu 13705266308

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