Yɛbɛkyerɛkyerɛ-temperature aging process of silicone foam materials mu akyerɛ wo afi nnyinasosɛm titiriw a ɛne sɛ ɛkorɔn-temperature aging ne sɛnea nneɛma atitiriw anum no nya onyin ho nhyehyɛe so nkɛntɛnso .
一,mmeae titiriw abien a ɛma silicone sponge .
Silicone foam board a ɛwɔ ɔhyew tebea mu no onyin no fi nsunsuanso a ɛka bom a ɛwɔ akwan abien a ɛne ne ho di nsɛ a wɔayɛ ho mfonini wɔ atifi hɔ mfonini no mu no mu titiriw.
Chemical Pathway (Thermal{}}oxygen aging): Ɔhyew a ɛkorɔn ne oxygen tow hyɛ siloxane akyi dompe ({1}}SI-O-) ne methyl afã nkɔnsɔnkɔnsɔn (-CH₃) so, na ɛma molecule nkɔnsɔnkɔnsɔn a ɛpaapae (depolymerization) anaasɛ ɛma ɛkɔ soro. Eyi ne nnuru ntini a ɛma nneɛma yɛ mmerɛw anaasɛ ɛyɛ den.
Nipadua mu kwan (thermal stress failure): Porous structure a ɛwɔ foam mu no fi awosu mu yɛ mfiri a ɛyɛ mmerɛw. Ɔhyew ntrɛwmu nsusuwii a ɛne ne ho nhyia a ɛwɔ ne nneɛma no mu no ma nhyɛso ahorow a ɛwɔ baabi no ba bere a ɔhyew no rekɔ so no, a ɛtrɛw fi ntini a ɛyɛ mmerɛw sen biara no mu ma efi ase na awiei koraa no ɛma ɔdan no bubu.
2.Wɔ-Nneɛma pɔtee bi a ɛwɔ nkɛntɛnso mu nhwehwɛmu a ɛkɔ akyiri .
1. Polymer molecule nhyehyɛe (ade a ɛkyerɛ) .
Rɔba a wɔannoa no su ne vinyl a ɛwɔ mu: vinyl ne ade titiriw a ɛma crosslinking reaction. Vinyl a ɛwɔ mu no kyerɛ sɛnea netɛw nhyehyɛe no yɛ den ne sɛnea ɛyɛ den wɔ vulcanization akyi. Wɔtaa de rɔba a wɔannoa a ɛwɔ vinyl a ɛwɔ mu pɔtee no di dwuma ma-temperature silicone foam board a ɛkorɔn.
Nneɛma a ɛba fam a ɛyɛ hyew (a ɛho hia): Sɛnea yɛadi kan aka ho asɛm no, D4/D5 cyclide ahorow a aka ne nsu a ɛyɛ hyew no yɛ adwuma sɛ "akwakoraa ne mmerewa a ɛma obi nyin". Saa nneɛma yi taa boaboa ano wɔ foam nkwammoaa mu, na ɛma nkɔnsɔnkɔnsɔn titiriw no a ɛkɔ soro no sɛe ntɛmntɛm ntɛmntɛm wɔ ɔhyew a ɛkɔ soro mu. Eyi a wobedi so no ne adwuma titiriw a ɛbɛma wɔatumi atra ase akyɛ afi fibea no mu.
2. Nhyehyɛe no a wɔbɛhyɛ mu den (skeleton support) .
Filler ne dispersion no su: gas phase silica ne ade titiriw a ɛhyɛ mu den. Ne sorokɔ pɔtee, soro ayaresa nhyehyɛe ne dispersion uniformity wɔ silica gel tẽẽ kyerɛ reinforcing effect. Apete a ɛnyɛ pɛpɛɛpɛ bɛma adwennwen a ɛwɔ mu no ayɛ kɛse na abɛyɛ nea efi ase wɔ onyin ne mpaapaemu mu.
3. Nneɛma a wɔde ka ho ne nea wɔde yɛ (nsɛm a wɔde si hɔ ne ahobammɔ) .
Ɔhyew{0}}Aduru a ɛko tia: Ɔhyew a ɛka ho-ɛko tia nneɛma te sɛ iron oxide (dade kɔkɔɔ) ne cerium oxide betumi akyere free radicals yiye na asiw ɔhyew oxygen onyin kwan no ano, a ɛno ne ade titiriw a ɛma ɛkyɛ{2}}bere a wɔde yɛ ɔhyew no tu mpɔn.
Sulfurization nhyehyɛe: Peroxide vulcanizing agent no su ne ne dodow bɛka crosslinking bond no su ne ne kɛse. crosslinking network a ɛyɛ den na ɛyɛ den no wɔ Anti-akɔkoraa tumi a eye sen biara.
4. Nneɛma a wɔyɛ ho nhyehyɛe (nhyehyɛe a wɔde di dwuma) .
Sɛnea ahurututu no yɛ pɛ: ahurututu kɛse ne ne kyekyɛ ho hia kɛse. Bubble structure a ɛnyɛ pɛpɛɛpɛ no bɛma stress kyekyɛ a ɛnyɛ pɛpɛɛpɛ bere a wɔayɛ no hyew no, na ahurututu akɛse anaa mmeae a ɛyɛ mmerɛw no bedi kan asɛe.
Sulfur a ɛwɔ mu: Sulfur a ɛnnɔɔso no betumi ama nkitahodi nhyehyɛe a enni mũ, mfiri ahoɔden so atew, ne onyin a ɛkɔ so ntɛmntɛm. Sulfur a ɛboro so no betumi de ntwamutam a ɛboro-atitiriw no aba, ɛyɛ den sɛ ɛbɛtew, na ɛyɛ mmerɛw kɛse.
POST-PROCESSING: PUOD PURON-Stage Vulcanization (agode) ho hia na ama wɔayi residual volatiles ne molecules a aka no afi hɔ koraa, a ɛho hia na ama product no ayɛ adwuma yiye na ama ɔhyew a ɛko tia no atu mpɔn.
5. Abɔnten so dwumadie tebea (sɔhwɛ a ɛtwa toɔ) .
Ɔhyew ne bere tenten a wɔde yɛ adwuma: onyin dodow bɛyɛ mmɔho abien wɔ ɔhyew a ɛkɔ soro digrii 10-15 biara mu. Sɛ wɔyɛ adwuma bere tenten wɔ ɔhyew anohyeto a wɔahyɛ no so a, ɛbɛma nkwa nna ayɛ tiaa kɛse.
Ɔhyew a wɔde tu kwan: Ɔhyew mu ɔbrɛ ho nhyɛso a efi ɔhyew ne awɔw a ɛtaa sesa mu ba no sɛe ade kɛse sen nea ɛwɔ ɔhyew tebea a ɛkɔ so daa mu no.
Nneɛma a atwa yɛn ho ahyia: Ngo, acid, alkali anaasɛ ultraviolet hann ne ozone a ɛkɔ so no bɛka abom ne ɔhyew ne onyin ayɛ ntɛmntɛm.
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