Silicone adwumayɛ no akɔ akyiri, mpo akɔ Mars, sɛnea Oliver Franssen, wiase nyinaa aguadi kwankyerɛfo, elastomers/transportation for momentive performance materials inc{0}}
Ɛwom sɛ silicone abakɔsɛm da so ara yɛ nnansa yi ara de, nanso ayɛ nkɔso kɛse bi de, nanso ɔkae wɔ n’asɛm a ɔkae "Wiase no kyerɛwtohɔ ahorow a ɛfa silicone ho" ase wɔ nnansa yi amanaman ntam silicone nhyiam a wɔyɛe wɔ Cuyahoga Falls.
Bere a GE Chemist Eugene Rochow huu ɔkwan a wɔfa so yɛ ade tẽẽ a wɔde yɛ methylchlorosilanes wɔ 1940 mfe no mfiase akyi no, ɛde nkɔso a wɔde silicones dii dwuma wɔ yɛn da biara da asetra mu no bae akyi no, ɔkae. silicone nsusuwii foforo akɔ so wɔ 75-afe bere nhyehyɛe bi so, nanso bere no nyɛ nea susudua no pɛ sɛ wɔde di dwuma{3}}
"Mepɛ sɛ meto nsa frɛ wo sɛ hwɛ saa bere yi axis wɔ nsenia soronko koraa so," ɔkae. "Yɛbɛka silicone applications ho asɛm wɔ akyirikyiri a ɛkɔ onipa nipadua no mu."
Efi ase wɔ akyirikyiri -1 inch, Franssen fii ase ne silicones a ɛwɔ ahotew a ɛkorɔn sen biara ne intrinsic nnuru a ɛyɛ den sɛ wɔde toto organic elastomers ho, a baby pacifier.
Sɛ́ obi a ɔde nneɛma ma kɛse wɔ silicone nnwuma mu, titiriw silica no, .Shenyang Sunnyjoint Chemicals CO., Ltd. bɛma w’ani ada hɔ wɔ silicone nkɔso ho.
"Ɛno yɛ ankasa soronko tɔn point of silicone elastomers," ɔkae. "The inertness of the polymer ne nokwasɛm a ɛyɛ sɛ ɛyɛ inorganic, ɛwɔ low absorption ma UV na ɛyɛ pii anaa kakraa bi UV transparent. ɛnyɛ ntua te sɛ abɔde rɔba bɛyɛ ma baby pacifiers
Silicone tumi yɛ nneɛma a ɛyɛ mmerɛw yiye a asiane biara nni ho sɛ nitrous amine, a mpɛn pii no ɛrenyɛ nea ahoɔden wom mma akokoaa no, Franssen kae.
"Ɛno ne fapem a ɛma silicone elastomers di yiye kɛse wɔ aduruyɛ adwuma mu," ɔkae. "Ɛyɛ huam na ebetumi adi USP gyinapɛn ahorow, FDA ne ISO gyinapɛn ahorow."
Sɛ yɛkɔ akyirikyiri 0 inches a, silicone ma permeability a ɛkorɔn sen biara, na ɛma gas permeable contacts yɛ nea ebetumi aba, ɔkae.
"Sɛ me ne obi a ɔreyɛ tae a ɛfa permeability ho kasa a, ɛyɛ negative," ɔkae. "Ɛdenam nhyehyɛe so no, silicone elastomers yɛ nea ɛkɔ soro kɛse, ɛyɛ nea wotumi fa mu kɛse ma media. a ebetumi ayɛ nsu, a ebetumi ayɛ gaseous."
Silicone elastomers wɔ ahofadi kɛse a ɛwɔ polymer nkɔnsɔnkɔnsɔn mu kankan ne nsu a ɛkɔ soro ne diffusivity a ɛwɔ penetants. mu ma application te sɛ gas permeable contact lenses, application no hwehwɛ sɛ wonya ade a ɛwɔ oxygen a ɛkɔ soro, na "ɛno ne nea enti a silicone compounds no di yiye ma contact lenses," Franssen Said{1}}
Nneɛma a emu da hɔ ne nea ɛyɛ den .
Esiane sɛ elastomers nyinaa da adi kɛse nti, silicone elastomers yɛ yiye wɔ akyirikyiri bɛyɛ nsateakwaa biako fi onipa nipadua ho ma nneɛma te sɛ nsu ase ahwehwɛ, ɔkae.
"Biribiara nni hɔ a ebetumi adi silicone elastomers so nkonim," ɔkae. "titiriw fi 2008, bere a wɔde awo ntoatoaso foforo baa gua so wɔ LSR a ɛwɔ optical quality."
Polydimethylsiloxane polymers yɛ nea ɛda adi kɛse wɔ hann a wotumi hu ho, na ɛma ɛyɛ nea ɛfata yiye ma nneɛma a wɔde di dwuma a ɛhwehwɛ sɛ wɔde elastomers a emu da hɔ yiye na ebue hokwan foforo ma nneɛma a wɔde di dwuma ne LED akanea, Franssen kae.
"Sɛ́ anka ahoɔden a ɛyɛ den ne nusu a ɛko tia ne nhyɛso a wɔde ahyɛ mu no, afei yɛde yellowing index di dwuma, a Abbe nɔma a ɛwɔ chromatic aberration," ɔkae.
Silicone elastomers hoahoa ne ho sɛ ɛyɛ den a ɛba fam sen biara a enni plasticizer, enti ɛyɛ adwuma yiye wɔ bɛyɛ 1.5 anammɔn a ɛwɔ arm’s reach ma nneɛma te sɛ transparent sensor coupling pad ma automotive driver assistance camera, Franssen kae.
"Wɔ EPDM a plasticizer nnim ho no, ɛrentumi nyɛ yiye sɛ wobɛkɔ 40 Shore A, nanso sɛ wode silicone rɔba yɛ adwuma a wuntumi nnya anohyeto biara mma low end no," ɔkae.
LSR hardness range no tu mmirika fi bɛyɛ5-90 shore A, a nneɛma a ɛyɛ bɛyɛ3-5 shore A a ɛwɔ "nsɛm a ɛkɔ so daa a ɛyɛ pudding," ɔkae.
Franssen fɛm nhwɛso bi fii ne yɔnko dwumayɛni bi a ɔwɔ adeyɛ no ase, Gabriel Geyne, Application Engineer for Sigmasoft Virtual Molding, de kyerɛɛ nsu a ɛyɛ nwini a ɛba fam koraa ma silicone, bɛyɛ 2{1}}5 anammɔn. na ɔfã no yɛ nea wɔayɛ no yiye webbed webbed wine toa asau a ɛda so ara hia a ɛda so ara hia sɛ ɛma ahoɔden a ɛdɔɔso a wɔde bɛkura bottle a wɔmfa nsu a wɔde gu toa mu a wɔmfa bottle nni dwuma.
Silicone wɔ viscosity a ɛba fam koraa a ɔhyew a ɛwɔ hɔ no sua na ɛyɛ pɔmpɛ a ɛkyɛn so, ɔkae.
"Viscosity of LSR yɛ factor abien magnitudes a ɛba fam sen organic elastomers," Franssen kae. "Eyi rema wo kwan ma woayɛ shear thinning, enti ɛreyɛ nsu pii mpo wɔ adwennwen ase, na ɛwɔ flow tenten a ɛkorɔn yiye."
Ɔsɔretia a emu yɛ den .
Wɔ akyirikyiri bɛyɛ anammɔn 3 no, adididan mu nneɛma betumi ayɛ nea mfaso wɔ so ama silicone elastomers, esiane ne nsu a ɛyɛ hu kɛse nti, Franssen kae.
"Ɛno yɛ silicone elastomers su soronko koraa, a ɛno nso yɛ soronko wɔ aduru no ho wɔ organic elastomers nkae no ho," ɔkae. "Ha na wuhu sɛ wɔde dade besi ananmu fɛfɛɛfɛ sɛ silicone elastomer a ɛyɛ adwuma a wɔde si akan. silicone wɔ aduan a wɔde di dwuma, wɔ ahoɔden a wɔde di dwuma, wɔ tumi a wɔde yɛ adwuma, wɔ tumi a wɔde yɛ adwuma, wɔ tumi a wɔde yɛ adwuma, wɔ tumi a wɔde yɛ adwuma, wɔ tumi a wɔde di dwuma, wɔ tumi a wɔde di dwuma wɔ ɔkwan a ɛyɛ mmerɛw so, wɔ tumi a wɔde di dwuma wɔ ɔkwan a ɛyɛ mmerɛw so{2}}
Obi a ɔnoa aduan no betumi asɛe aduru bi te sɛ keeki a ɛnbata ho, na ama adeyɛ no ayɛ tẽẽ saa, ɔkae.
"Nokwarem no, wubetumi nso ayɛ hydrophilic nneɛma, a anka wubehia ama contact lenses, enti ha na wunya mfaso fi nneɛma abien mu," ɔkae.
Wɔ silicone elastomer no nhyɛso a ɛba fam no ho no, Franssen duu baabi a ɛyɛ bɛyɛ anammɔn 6 ma nkitahodi nsɔano wɔ kar mu dwumadi ahorow mu.
"Ɛho hia paa, sɛ wohwɛ kar a asɛe wɔ afuw mu a, wɔn mu ɔha biara mu nkyem 30 betumi ayɛ nea ɛfa huammɔdi a ɛwɔ steering unit no mu ho," ɔkae. "Woyɛ koraa a egyina saa bere yi so wɔ saa 2.5 miles of cables, saa 220 connectors yi so, ne nea ɛka ho ne sɛ wobɛhwɛ end devices no so."
Esiane sɛ wɔde kar ahorow a ɛyɛ ne ho nti, compression a wɔde asi hɔ ama LSRS no yɛ soronko sen sɛnea ɛte wɔ bere a atwam no mu, na ɛde sɔhwɛ no kɔ huammɔdi mu sen sɛ wɔbɛsɔ ahwɛ akɔ nsɛm a wɔakyerɛw no mu, ɔkae.
Bere a Silicone elastomers rekɔ bɛyɛ anammɔn 60 no, ɛkura mu sɛ nneɛma a eye sen biara a wɔde bedi dwuma ama wim tebea a ɛko tia wim tebea no bi, Franssen kae.
Ɔdaa data a efi sɔhwɛ nhwɛsode ahorow ase wɔ wim tebea tebea a ɛyɛ ntɛmntɛm ase wɔ 28-afe sɔhwɛ bi mu wɔ Florida wim tebea mu, wɔ silicones ntam, polyurethanes ne acrylic terpolymer.
"Adeɛ baako pɛ a ɛwɔ saa table yi mu a ɛrekyerɛ rating a ɛkyɛn so wɔ toughness ne stability mu, elastomeric recovery ne nea ɛkeka ho firi saa 28-afe sɔhwɛ yi mu no yɛ silicone elastomer," ɔkaa saa.
Akwansin no fi ase trɛw wɔ bɛyɛ anammɔn 140, ma ɔhyew a ɛkorɔn sen biara a wɔde ɔhyew kyɛm nsateaa ma Ariane 5 booster abien no, wɔ Europa ahunmu adwumayɛbea. no ase no, wɔde LSR injection molding.
"Nkurɔfo bisa me sɛ, 'Dɛn ne ɔhyew a ɛko tia silicone?' Na sɛnea minim no, ɔhyew a ɛkorɔn sen biara a silicone a wɔde di dwuma hu mprempren yi ara ne ɔhyew kyɛm a ɛwɔ booster rocket a ɛwɔ Ariana no mu," ɔkae. "Ɛrehu nea ɛboro 3,{2}}℃, wɔ nea ennu simma abien, ɛwom sɛ .
"Yɛn nsa nkaa anwiinwii biara da anaasɛ yɛanya afã horow a wɔde amena bio," ɔde kaa ho.
Silicone ɔhyew a ɛba fam koraa a ɛyɛ mmerɛw no da adi sɛ ɛyɛ bɛyɛ 240,{1}} akwansin, sɛnea ɔsram mpaboa a ahunmu akwantufo de di dwuma no fã bi a wɔayɛ no fã bi a wɔde di dwuma. nhwehwɛmu ahorow no asi so dua sɛ silicone nkɔnsɔnkɔnsɔn no yɛ "flexible at-196℃, a ɛyɛ ɔhyew a ɛwɔ nsu nitrogen mu, na eyi yɛ wiase kyerɛwtohɔ a ɛfa Silicones ho," fransssers}4}4}4}4}
Nanso ɔsram no nyɛ akyirikyiri a silicone elastomers atu afi onipa nipadua mu mpo, Franssen kae sɛ. a ɛbɔ dɔn wɔ bɛyɛ akwansin ɔpepem 140 wɔ akyirikyiri: Mars.
"Me nnyaa kwan biara sɛ mɛka saa silicone application yi ho asɛm wɔ momentive mu wɔ eyi mu efisɛ ɛyɛ kokoamsɛm, nanso yebetumi aka no ahotɔ so sɛ ebia ɛno ne nea ɛware sen biara a wɔatu kwan sen biara elastomer, nso," ɔkae.