Uhlahlelo oluthelekisayo lokuNyanga iindlela zoVavanyo lweSiganga seSilicone sokuncamathelisa okuSensitive nguJiangsu. PTFE High-Ubushushu Abavelisi Fabric
(Indlela yokutsalwa kwe-Solvent, Indlela ye-DSC kunye nendlela ye-FTIR)
I. Imigaqo yomlinganiselo kunye neeyantlukwano ezibalulekileyo
Le ndlela ilinganisa umxholo wejeli. Iisampuli zicatshulwa ngokuphindaphindiweyo nge-solvent elungileyo; iimolekyuli ezingadityaniswanga ziyanyibilika. Intsalela eyomileyo ilinganiswa ukubala iqhezu lobunzima lezinto ezinganyibilikiyo, ebonisa ubungakanani besakhiwo sothungelwano esinganyibilikiyo esikhulu.
2. Indlela yeDSC
Le ndlela ilinganisa ubushushu obushiyekileyo. Ukukhutshwa kobushushu obupheleleyo beesampuli ezingabonakaliyo (ΔHtotal) kunye nokukhutshwa kobushushu obushiyekileyo beesampuli zovavanyo (ΔHresidual) zilinganiswa ngokulandelanayo. Iqondo lokunyanga: α=1−ΔHresidual/ΔHtotal Ibonisa umyinge wamaqela asebenzayo asebenzayo.
3. Indlela ye-FTIR Spectroscopy
Le ndlela ibeka iliso ekusetyenzisweni kwamaqela asebenzayo. Kwiinkqubo ze-hydrosilylation, iindawo eziphakamileyo ezahlukeneyo ze-Si-H (≈2160 cm⁻⊃1;) okanye i-Si-Vi (≈1595 cm⁻⊃1;) zilandelwa. Incopho yomgangatho wangaphakathi (umzekelo, i-Si-CH₃ kwi-≈1260 cm⁻⊃1;) yamkelwa ukuze iqheleke, inike ngokuthe ngqo izinga lokuguqulwa kweebhondi ezithile zeekhemikhali.
II. Uthelekiso oluchanekileyo kunye neempazamo ezinkulu
Amacandelo amatyathanga angaphendulwanga athinjwe kukuphonswa komzimba kunye nokutshixwa kwe-topological achongwa ngempazamo njenge 'crosslinked structure', okukhokelela kuqikelelo olucwangcisiweyo lweqondo lokunyanga imichiza. Ngaphandle koko, iziphumo zovavanyo zichatshazelwa kukusebenza kakuhle kokuchithwa, ukulahleka kwe-microgel kunye nokuguquguquka kweemeko zokusebenza, ngokuchaneka kwe-±2-5% kuphela.
2. Indlela yeDSC
Inikezela ngokuchaneka okuphezulu kumazinga oguqulo asezantsi ukuya kwephakathi. Nangona kunjalo, kwiqondo eliphezulu lokunyanga, amaqela asebenzayo ashiyekileyo akakwazi ukuphendula ngokupheleleyo ngenxa yokunciphisa ukusabalalisa, okukhokelela ekukhululweni kobushushu obuphantsi kunye nokugqithisa okubalulekileyo kweqondo lokunyanga. Iimpazamo ezongezelelweyo zivela kukhetho olusisiseko, ukuphendulwa kwecala kunye nokuzimisela kwe-ΔHtotal. Ukuphinda-phinda kwayo kuyathandeka (<±2%).
3. Indlela ye-FTIR
Ijonga ngokuthe ngqo i-chemical bond evolution kwaye iqhayisa ngokuhambelana okuphezulu kunye nokuguqulwa kwekhemikhali yokwenyani. Iimpazamo eziphambili zibangelwa kukudibana okuphezulu (umzekelo, ukuphazamiseka komphunga wamanzi kwiisignali ze-Si-H). Imowudi ye-ATR ibona kuphela iileya zomphezulu; idatha yovavanyo iya konakala ukuba ukunyanga ukufana kuyahluka phakathi komphezulu kunye nangaphakathi. Umlinganiselo uhambelana noMthetho weLambert-Beer kwaye uxhomekeke kwiisampulu zereferensi ezinganyangekanga. Ibonisa ukuchaneka okuphezulu okumalunga ne-±1–3%.
III. UkuCalulwa kokuChaneka okuBanzi
Igwetywe ngowona mgangatho wokuguqulwa kweekhemikhali , ukulandelelana ngokuchanekileyo: Indlela ye-FTIR > Indlela ye-DSC (uluhlu lokuguqulwa olusezantsi ukuya kwephakathi) > Indlela yokukhupha i-Solvent
Indlela yokutsalwa kwe-Solvent Ukuchaneka okuphantsi. Amaxabiso ovavanyo anyusiwe ngenxa yegalelo lomzimba kwaye abonisa olona lungelelwaniso lubi kakhulu kunye nemeko yokuphambana kweekhemikhali. Nangona kunjalo, iziphumo zayo zikufutshane ekusebenzeni kwenkonzo ebonakalayo kwizicelo zoshishino.
Indlela ye-DSC Ithembekile kwaye ichanekile phantsi kwamazinga oguqulo asezantsi ukuya-phakathi. Isenokuvelisa ufundo lweqondo eliphezulu lokunyanga phakathi kwemimandla elawulwa yi-diffusion, ngoko ke ayizukusetyenziswa ngokuzimeleyo ukuvavanya iinkqubo ezinyangelwe kakhulu.
Indlela ye-FTIR Ukuchaneka okuphezulu, okukwazi ukwahlula ngokucokisekileyo ukuguqulwa kweekhemikhali, ngokukodwa ukulungelelaniswa phantsi kwamazinga okuguqulwa okuphakathi ukuya phezulu.
IV. Iingcebiso eziSebenzayo zokuSebenza
Indlela yokutsalwa kwe-Solvent Ifanelekile ukuhlolwa komgangatho ukuze kuqinisekiswe ngokukhawuleza ukuba umxholo wejeli uyahlangabezana neemfuno zenkonzo. Ufundo lwayo aluyi kulinganisa ngokuthe ngqo ukuxinana kweekhemikhali ze-crosslink.
Indlela ye-DSC Isetyenziswa kuphando lwe-reaction kinetics kunye nokubeka iliso kwinkqubo. Ingqalelo iya kuhlawulwa ekutenxeni komlinganiselo kwinqanaba eliphezulu loguqulo. Uvavanyo oludibeneyo kunye neNdlela ye-FTIR iyacetyiswa.
Indlela ye-FTIR Indlela yolungelelwaniso ekhethwayo ye-R&D nguJiangsu PTFE abavelisi belaphu lobushushu obuphezulu. Inokumisela ngokuthe ngqo imilinganiselo yokuguqulwa kwemichiza kuphuhliso lwefomula kunye nokwandisa inkqubo. Idityaniswe novavanyo lwe-DSC, ibonelela ngolwazi oluhambelanayo malunga nokunyangwa kwenkqubela phambili.
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