Hydrogenated nitrile rubber (HNBR) yitirhisiwa ngopfu eka switirhisiwa leswi lavaka swivumbeko swa dynamic swa mahiselo yale henhla nale hansi xikan’we naku tiya ka kahle eka ku dyuhala, endzhaku ka ku pfimba eka oyili na mati Endzhaku ko pfimba eka mafurha na mati, HNBR yitirhisiwa ngopfu eka switirhisiwa leswi lavaka swivumbeko swale henhla swa dynamic eka mahiselo yale henhla nale hansi xikan’we naku lwisana kahle na ku dyuhala. Switirhisiwa leswi tolovelekeke leswi lavaka swivumbeko leswi i ti timing belts, ti high pressure hoses na ti paper rolls. Switirhisiwa swa rhaba leswi tirhisiwaka swi endliwa eka swiyimo swa dynamic leswi lavaka ngopfu naswona switala ku endliwa switshuketa eka mahiselo yohambana hambana na frequency. Swikambelo swa ntolovelo leswi tirhisiwaka ku hlamusela swivumbeko swa dynamic swa switirhisiwa hi ntolovelo swi endliwa eka mahiselo ya kamara.
Loko swikambelo leswi swinga hlamusela kahle switirhisiwa leswinga tatiwanga, mipimo eka mahiselo ya ndzhawu ayi kombisi mbuyelo wa mahiselo eka ku tirhisana ka filler-monomer. ku tirhisana ka filler na filler-polymer xikan’we na mbuyelo wa swona eka swivumbeko swa swilo eka mahiselo yale henhla swinene. Eka ti polymers leti endleriweke ngopfu ngopfu switirhisiwa swa mahiselo yale henhla, ku twisisa mbuyelo wa mahiselo eka swivumbeko swa xithekiniki swa switirhisiwa swa laveka eka ku antswisiwa loku faneleke ka compound.
Eka phepha leri, mbuyelo wa mahiselo eka swivumbeko swa xithekiniki swa tirhaba leti tatiweke wu lavisisiwile, ku kongomisiwa eka muxaka wa filler, mpimo wa yona, na ku tirhisana ka filler na ti polymers ta HNBR na hydrogenated carboxylated nitrile butadiene rubber (HXNBR).
Hi xikongomelo lexi, phepha leri ri pimanisa ti carbon blacks leti tiyisisaka (N330) na leti nga tiyisiki (N990) na silica (VulcasilN). Vuandlalo bya silica byi nga cinciwa hi ndlela yo ka yi nga tirhi (filler surface hydrophobic) na hi ndlela yo tirha (filler surface hydrophobic naswona yi bohiwa eka polymer). Nhlayo leyi andzaka ya ti compounds yitlhela yitirhisa ti monomeric fillers, kufana na zinc diacrylate (ZAD), leyinga polymerized in situ hinkarhi wa vulcanization kuva yi antswisa swivumbeko swa material. 'fillers' leti tintshwa na ku tirhisana ka tona na matrix ya polymer a swi se dyondziwa hi ku ya hi swivumbeko leswi titshegeke hi mahiselo na frequency. 'fillers' leyintshwa na ku tirhisana ka tona na matrix ya polymer a swi kamberiwanga hi ku ya hi swivumbeko leswi titshegeke hi mahiselo na frequency.
Hiku ya hi swivumbeko swa michini na dynamic mechanical swa ti vulcanized na unvulcanized HNBR compounds, ti fillers to hambana hambana (carbon black, silica na ZDA) ti kamberiwile kuva ti tatiwa. na ZDA) filled standard HNBR na HXNBR rubbers swikamberiwile hiku xixima ku titshega ka mahiselo ya swivumbeko swo tiyisisa.
Kuhunguteka ka modulus hiku tlakuka ka mahiselo eka ti rubbers hinkwato letinga vulcanized (handle ka sisiteme leyi taleke hi silica) i mbuyelo wa ku titshega ka mahiselo ya viscosity ya polymer matrix. Muxaka na nhlayo ya filler eka binder swiboha ntsena degree ya reinforcement naswona aswina mbuyelo eka kuhunguteka loku titshegeke hi mahiselo eka binder modulus.
Eka swinamarheti leswi taleke hi silica, ku hlangana ka swiphemuphemu swa silica swi boha mahanyelo lawa ya titshegeke hi mahiselo. Loko vuandlalo bya silica byi tshunguriwa hi silica alkane treatment kuva ku fikeleriwa hydrophobicity, ku hlangana ka ti silica particles swa siveriwa. Eka ti amplitudes letikulu ta deformation, ku tiyisisiwa ka ti carbon black hinkwato na ti silica-filled compounds swinga hlamuseriwa tani hi hydrodynamic reinforcement ntsena.
Loko ZDA yitirhisiwa tani hi filler, kungari na mbuyelo wo tiyisisa lowu voniwaka eka ti unvulcanized rubber compounds hikuva ZDA ayi se polymerized naswona yitirha ntsena tani hi low relative molecular mass plasticizer. Ti compounds letingana ZDA atiri na ti viscosities tale hansi eka tinxaka hinkwato, leswi kombaka swivumbeko swa kahle swaku lulamisiwa.
Ku pimanisiwa ka swivumbeko swa michini leswi cinca-cincaka na swivumbeko swa ntshikelelo eka rhaba ya vulcanized swi kombisile leswaku nkatsakanyo wa rhaba ya HXNBR leyi taleke hi ZDA a yi ri na Matimba lamakulu yo tatisela naswona swivumbeko swa michini swo hetelela leswikulu (ntshikelelo na ku leha loko ku tshoveka) swi hungutekile loko mahiselo ya tlakuka eka swihlanganisi hinkwaswo. Ku tirhisana lokukulu exikarhi ka filler surface na polymer matrix swi engetelela mbuyelo wa mahiselo eka swivumbeko swo tiyisisa. Hambi leswi ku tirhisana ka ionic exikarhi ka mintlawa ya ZDA na HXNBR carboxyl swi kuriseke ntshikelelo wa ku tshoveka, ku tirhisana loku ka ionic a ku ri hava mbuyelo eka ku titshega ka mahiselo ya ntshikelelo wa ku tshoveka. Leswi swi ringanyeta leswaku ku tirhisana ka ionic loku tiyeke hi michini exikarhi ka ZDA na functionalized polymer matrix (HXNBR) i xilaveko xa le mahlweni xa swivumbeko swa kahle swa michini na swa michini leswi cinca-cincaka swa swilo swa rhaba leswi nga na ku lahlekeriwa ka le hansi ka hysteresis ehansi ka swiyimo swa dynamic deformation.
