Ntotoho a ɛfa Pɛpɛɛpɛ a ɛwɔ Curing Degree Sɔhwɛ Akwan a Wɔde Ma Silicone Pressure-Sensitive Adhesives (Solvent Extraction Ɔkwan, DSC Ɔkwan ne FTIR Ɔkwan)

Ntotoho Nhwehwɛmu a ɛfa Curing Degree Sɔhwɛ Akwan a Wɔde Ma Silicone Nhyɛso-Sensitive Adhesives a Jiangsu yɛe PTFE Ntama a Ɛyɛ Ɔhyew a Ɛkorɔn a Wɔyɛ

(Solvent Extraction Ɔkwan, DSC Ɔkwan & FTIR Ɔkwan)

I. Nsusuwii Nnyinasosɛm ne Nsonsonoe a Ɛho Hia

1. Ɔkwan a Wɔfa so Yi Solvent Fi Mu

Saa kwan yi susuw gel dodow a ɛwɔ mu. Wɔde aduru pa a wɔde siw ano yiyi nhwɛsode ahorow no mpɛn pii; molecule ahorow a ɛnyɛ crosslinked no tew fi mu. Wɔkari nkae a ayow no de bu nneɛma a entumi nnye mu no kɛse fã, a ɛkyerɛ sɛnea macro insoluble network structure no fã te.

2. DSC Ɔkwan a Wɔfa so Yɛ

Saa kwan yi susuw ɔhyew a aka wɔ adeyɛ mu. Wɔsusu ɔhyew a ɛfiri nhwɛsodeɛ a wɔansa no yareɛ mu nyinaa (ΔHtotal) ne ɔhyew a aka a ɛfiri sɔhwɛ nhwɛsoɔ mu (ΔHresidual) mu. Curing degree: α=1−ΔHresidual/ΔHtotal Ɛkyerɛ sɛnea residual reactive functional groups no fã bi te.

3. FTIR Spectroscopy Ɔkwan a Wɔfa so Yɛ

Saa kwan yi hwɛ sɛnea wɔde dwumadi akuw a ɛda nsow di dwuma no so. Wɔ hydrosilylation nhyehyɛe ahorow ho no, wɔdi Si-H (≈2160 cm−⊃1;) anaa Si-Vi (≈1595 cm−⊃1;) nsakraeɛ a ɛwɔ beaeɛ a ɛsen biara no akyi. Wɔfa emu gyinapɛn peak (sɛ nhwɛso no, Si-CH3 wɔ ≈1260 cm−⊃1;) ma normalization, tẽẽ ma nsakrae rate a nnuru pɔtee bi nkitahodi.

II. Pɛpɛɛpɛ a Wɔde Toto Ho ne Mfomso Titiriw

1. Ɔkwan a Wɔfa so Yi Solvent Fi Mu

Nkɔnsɔnkɔnsɔn afã horow a ɛnyɛ adwuma a honam fam entanglement ne topological locking akyere no, wodi mfomso kyerɛ sɛ 'crosslinked structure', a ɛde nhyehyɛe mu bu akontaa boro so wɔ nnuru a wɔde sa yare dodow ho. Ɛno da nkyɛn a, sɔhwɛ mu aba no nya nkɛntɛnso wɔ dissolution efficiency, microgel loss ne nsakrae a ɛba adwumayɛ tebea horow mu, a pɛpɛɛpɛyɛ ±2–5% pɛ.

2. DSC Ɔkwan a Wɔfa so Yɛ

Ɛde pɛpɛɛpɛyɛ a ɛkorɔn kakra ma wɔ nsakrae dodow a ɛba fam kosi mfinimfini. Nanso, wɔ curing degrees a ɛkorɔn mu no, residual functional groups ntumi nyɛ wɔn ade koraa esiane diffusion anohyeto nti, na ɛde ɔhyew a wɔsusuw a ɛba fam a ɛba fam ne curing degree ho akontaabu a ɛboro so kɛse ba. Mfomso foforo fi mfiase a wɔpaw, afã horow a wɔyɛ ne ΔHtotal a wɔkyerɛ mu. Ne repeatability yɛ papa (<±2%).

3. FTIR Ɔkwan a Wɔfa so Yɛ

Ɛhwɛ nnuru a ɛka bom no nkɔso tẽẽ na ɛhoahoa ne ho sɛ ɛne nnuru a wɔsakra no ankasa hyia a ɛkorɔn sen biara. Mfomso atitiriw fi peak overlap (sɛ nhwɛso no, nsu a ɛyɛ hyew a ɛtwetwe Si-H nsɛnkyerɛnne so). ATR mode no hu surface layers nkutoo; sɔhwɛ data bɛkyinkyim sɛ curing uniformity yɛ soronko wɔ soro ne mu. Nsusuwii di Lambert-Beer Mmara no so na ɛde ne ho to nhwɛsode ahorow a wɔansa no yare so. Ɛda pɛpɛɛpɛyɛ a ɛkorɔn adi bɛyɛ ±1–3%.

III. Pɛpɛɛpɛ a Wɔde Di Dwuma a Ɛkɔ Akyiri

Sɛ yɛhwɛ sɛnea nnuru nkitahodi ahorow no nsakrae ankasa te atɛn a, sɛnea wɔyɛ no pɛpɛɛpɛ ne: FTIR Ɔkwan > DSC Ɔkwan (nsakrae a ɛba fam kosi mfinimfini) > Solvent Extraction Method

Solvent Extraction Method  Pɛpɛɛpɛ a ɛba fam koraa. Sɔhwɛ gyinapɛn ahorow no kɔ soro esiane honam fam ntoboa nti na ɛkyerɛ abusuabɔ a enye koraa a ɛne nnuru crosslinking tebea no wɔ. Ne nyinaa mu no, nea efi mu ba no bɛn ɔsom adwuma a mfaso wɔ so wɔ mfiridwuma mu dwumadie mu.

DSC Ɔkwan no  Wotumi de ho to so na ɛyɛ pɛpɛɛpɛ wɔ nsakraeɛ dodoɔ a ɛba fam kɔsi mfimfini ase. Ebia ɛbɛma atoro a ɛyɛ ayaresa dodow akenkan a ɛkorɔn aba wɔ mmeae a diffusion-controlled mu, enti ɛnsɛ sɛ wɔde di dwuma wɔ ahofadi mu mfa nsɔ nhyehyɛe ahorow a wɔasa no kɛse hwɛ.

FTIR Ɔkwan  Pɛpɛɛpɛ a ɛkorɔn sen biara, a ɛtumi kyerɛ nsonsonoeɛ a ɛda nnuru nsakraeɛ ntam yie, titire a ɛfata ma nsonsonoeɛ wɔ nsakraeɛ dodoɔ a ɛwɔ mfimfini kɔsi soro ase.

IV. Nyansahyɛ a Wɔde Di Dwuma a Mfaso

Solvent Extraction Method  Ɛfata ma nhwehwɛmu a ɛyɛ papa de hwɛ ntɛmntɛm sɛ ebia gel a ɛwɔ mu no di ɔsom ahwehwɛde ahorow ho dwuma anaa. Ɛnsɛ sɛ wɔde n’akenkan no toto nnuru crosslink density ho tẽẽ.

DSC Ɔkwan  A wɔfa so yɛ adwuma ma reaction kinetics nhwehwɛmu ne process monitoring. Wɔbɛtwe adwene asi susudua a ɛkɔ akyiri wɔ nsakraeɛ mmerɛ a ɛkorɔn mu. Wɔkamfo kyerɛ sɛ wɔmfa FTIR Ɔkwan no nyɛ nkwaa sɔhwɛ.

FTIR Ɔkwan a  Jiangsu PTFE ntama a ɛyɛ hyew kɛse a wɔyɛ de yɛ calibration kwan a wɔpɛ. Ebetumi de gyinapɛn ahorow asi hɔ tẽẽ ama nnuru a wɔdannan no dodow a wɔde bɛyɛ nnuru a wɔde yɛ nnuru ne nhyehyɛe a wɔyɛ no yiye. Sɛ wɔde ka DSC sɔhwɛ ho a, ɛde nsɛm a ɛka ho ma wɔ ayaresa nkɔso ho.

Atifi hɔ nsɛm no yɛ nea wɔde ama Jiangsu Aokai Nneɛma Foforo Mfiridwuma Co., Ltd.

Sɛ wopɛ sɛ wosua nsɛm a ɛkɔ akyiri, dwumadie tebea ne ano aduru a wɔayɛ ama nneɛma a ɛyɛ pɛpɛɛpɛ a nea ɛka ho ne PTFE ntama a ɛyɛ hyew a ɛkorɔn, PTFE a ɛyɛ hyew a ɛkorɔn a wɔde nkata so, PTFE a ɛyɛ hyew a ɛkorɔn mesh abɔso, seamless fusing mfiri abɔso, PTFE ntama a ɛwɔ afã biako, ɔhyew a ɛkorɔn a ɛko tia conveyor belt ne ɔhyew a ɛkorɔn fiberglass ntama a ɛko tia, yɛsrɛ sɛ fa akwan a ɛwɔ ase ha no so di yɛn ho nkɔmmɔ:

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