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Kunyumba » Nkhani » PTFE Coated Nsalu » Kufananiza Kulondola kwa Njira Zoyezera Digiri ya Kuchiritsa kwa Silicone Pressure-Sensitive Adhesives (Njira Yosungunulira, Njira ya DSC ndi Njira ya FTIR)

Kuyerekeza Kulondola kwa Kuchiritsa Njira Zoyesera Digiri ya Zomatira za Silicone Pressure-Sensitive Adhesives (Njira Yosungunulira Yosungunula, Njira ya DSC ndi Njira ya FTIR)

Mawonedwe: 0     Wolemba: Site Editor Nthawi Yosindikiza: 2026-07-24 Origin: Tsamba

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Kuwunika Kofananira kwa Njira Zoyesera Zoyeserera za Silicone Pressure-Sensitive Adhesives lolemba Jiangsu Nsalu Zapamwamba za PTFE Opanga

(Njira Yopangira Zosungunulira, Njira ya DSC & Njira ya FTIR)

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I. Mfundo Zoyezera ndi Kusiyana Kofunikira

1. Njira Yotulutsira Zosungunulira

Njirayi imayeza gel osakaniza. Zitsanzo zimachotsedwa mobwerezabwereza ndi zosungunulira zabwino; mamolekyu osayanjanitsika amasungunuka. Zotsalira zouma zimayesedwa kuti ziwerengere kuchuluka kwa zinthu zomwe sizingasungunuke, kuwonetsa kuchuluka kwa ma macro insoluble network.

2. Njira ya DSC

Njirayi imayeza kutentha kotsalirako. Kutentha kwathunthu kwa zitsanzo zosachiritsika (ΔHtotal) ndi kutentha kotsalira kwa zitsanzo zoyesera (ΔHresidual) zimayesedwa motsatira. Digiri yochiritsa: α=1−ΔHresidual/ΔHtotal Imadziwika ndi kuchuluka kwamagulu otsalira ogwirira ntchito.

3. Njira ya FTIR Spectroscopy

Njirayi imayang'anira kagwiritsidwe ntchito kamagulu ogwira ntchito. Kwa machitidwe a hydrosilylation, kusiyana kwakukulu kwa malo a Si-H (≈2160 cm⁻⊃1;) kapena Si-Vi (≈1595 cm⁻⊃1;) amatsatiridwa. Chiwongola dzanja chamkati (mwachitsanzo, Si-CH₃ pa ≈1260 cm⁻⊃1;) chimatengedwa kuti chikhale chokhazikika, kumapereka mwachindunji kutembenuka kwa ma bond enieni a mankhwala.

II. Kuyerekeza Kolondola ndi Zolakwa Zazikulu

1. Njira Yotulutsira Zosungunulira

Magawo osasunthika omwe amatsekeredwa ndi kutsekeredwa kwakuthupi komanso kutsekeka kwapamwamba amazindikiridwa molakwika kuti 'mapangidwe ophatikizika', zomwe zimatsogolera kuchulukirachulukira kwa digiri yochiritsa mankhwala. Kupatula apo, zotsatira zoyesa zimakhudzidwa ndi kusungunuka kwachangu, kutayika kwa ma microgel ndi kusinthasintha kwa magwiridwe antchito, ndikulondola kwa ± 2-5%.

2. Njira ya DSC

Imapereka kulondola kwakukulu pamitengo yosinthika yotsika mpaka yapakatikati. Komabe, pamlingo wochiritsa kwambiri, magulu otsalira ogwira ntchito sangathe kuchitapo kanthu chifukwa cha kuchepa kwa kufalikira, zomwe zimapangitsa kuti kutentha kuchepe komanso kuchulukirachulukira kwa digiri yamachiritso. Zolakwa zowonjezera zimachokera ku kusankha koyambira, machitidwe a mbali ndi kutsimikiza kwa ΔHtotal. Kubwereza kwake ndikobwino (<± 2%).

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3. Njira ya FTIR

Imawona mwachindunji chisinthiko chamankhwala ndipo imadzitamandira kusakanikirana kwakukulu ndi kutembenuka kwenikweni kwamankhwala. Zolakwa zazikulu zimayamba chifukwa cha kuchulukana kwapamwamba (mwachitsanzo, kusokoneza kwa nthunzi wamadzi pazizindikiro za Si-H). Njira ya ATR imangozindikira zigawo zapamwamba; data yoyeserera idzasokonekera ngati kuchiritsa kusiyanasiyana kumasiyana pakati ndi mkati. Kuyeza kumagwirizana ndi Lambert-Beer Law ndipo kumadalira zitsanzo zomwe sizinachiritsidwe. Imakhala ndi kulondola kwakukulu pafupifupi ± 1-3%.

III. Kulondola Kwathunthu

Kutengera kutembenuka kwenikweni kwa ma bond a mankhwala , kulondola kolondola ndi: Njira ya FTIR > Njira ya DSC (kutembenuka kwapakatikati) > Njira Yosungunulira Yosungunulira

Zosungunulira m'zigawo Njira  Otsika olondola. Mayeso amakwezedwa chifukwa cha zopereka zakuthupi ndikuwonetsa kulumikizana koyipa kwambiri ndi mawonekedwe ophatikizika ndi mankhwala. Komabe, zotsatira zake zili pafupi kwambiri ndi magwiridwe antchito ogwira ntchito m'mafakitale.

Njira ya DSC  Yodalirika komanso yolondola pamasinthidwe otsika mpaka apakatikati. Itha kupangitsa kuwerengera kwamadigiri ochiritsa mwabodza m'magawo omwe amayendetsedwa ndi kufalikira, kotero sidzagwiritsidwa ntchito paokha poyesa machitidwe omwe adachiritsidwa kwambiri.

Njira ya FTIR  yolondola kwambiri, yokhoza kusiyanitsa bwino kutembenuka kwamankhwala, makamaka koyenera kusiyanitsa pansi pamitengo yapakatikati mpaka yayikulu.

IV. Malangizo Ogwiritsa Ntchito

Njira Yotulutsira Zosungunulira  Yoyenera kuyang'anira mtundu kuti mutsimikizire mwachangu ngati zomwe zili mu gel zikukwaniritsa zofunikira zautumiki. Kuwerenga kwake sikungafanane mwachindunji ndi kachulukidwe kakemikoloko.

Njira ya DSC  Yogwiritsidwa ntchito pakufufuza kwa kinetics ndi kuwunikira ndondomeko. Chidziwitso chidzaperekedwa pakupatuka kwa miyeso pamiyeso yayikulu. Kuyesa kophatikizana ndi FTIR Njira ndikulimbikitsidwa.

Njira ya FTIR  Njira yosinthira yokonda ya R&D yolembedwa ndi Jiangsu PTFE opanga nsalu zotentha kwambiri. Ikhoza kukhazikitsa ndondomeko yosinthira mankhwala kuti ipangidwe ndi kukhathamiritsa ndondomeko. Kuphatikizidwa ndi kuyezetsa kwa DSC, kumapereka chidziwitso chothandizira pakuchiritsa.

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