Gukwirakwiza ibikoresho bya HNBR bya reberi kubushyuhe bwo hejuru bukoreshwa

Hydrogenated nitrile rubber (HNBR) ikoreshwa cyane mubisabwa bisaba ubushyuhe bwo hejuru kandi buke bwo hasi hamwe no kurwanya gusaza, nyuma yo kubyimba amavuta n'amazi Nyuma yo kubyimba amavuta n'amazi, HNBR ikoreshwa cyane mubisabwa bisaba imbaraga zikomeye cyane mubushyuhe bwo hejuru kandi buke hamwe no kurwanya gusaza neza. Porogaramu zisanzwe zisaba iyi miterere ni umukandara wigihe, umuvuduko mwinshi hamwe nimpapuro. Ibicuruzwa bya reberi bikoreshwa bikenerwa cyane ningaruka zingirakamaro kandi akenshi bigahungabana kubera ubushyuhe bwinshi ninshuro. Ibizamini bisanzwe bikoreshwa mukuranga imbaraga zingirakamaro mubikoresho bikorerwa mubushyuhe bwicyumba.

Mugihe ibi bizamini bishobora kuranga ibikoresho bituzuye neza, ibipimo byubushyuhe bwibidukikije ntibigaragaza ingaruka zubushyuhe kumikoranire yuzuza-monomer. kuzuza no kuzuza-polymer hamwe ningaruka zabyo kumiterere yibintu mubushyuhe bwinshi. Kuri polymers yagenewe byumwihariko kubushyuhe bwo hejuru, gusobanukirwa ningaruka zubushyuhe kumiterere ya tekiniki yibikoresho birakenewe muburyo bwiza bwo guhuza neza.

Muri iyi nyandiko, hasuzumwe ingaruka zubushyuhe kumiterere ya tekiniki ya reberi yuzuye, hibandwa ku bwoko bwuzuza, urugero rwabwo, ndetse n’imikoranire yuzuza na HNBR hamwe na hydrogenated carboxylated nitrile butadiene rubber (HXNBR).

Kubwiyi ntego, iyi mpapuro igereranya gushimangira (N330) no kudakomeza (N990) umukara wa karubone hamwe na silika (VulcasilN). Ubuso bwa silika burashobora guhindurwa muburyo bworoshye (kuzuza hejuru ya hydrophobique) no gukora cyane (kuzuza hydrophobique yuzuye kandi bihujwe na polymer). Umubare wiyongera wibintu ukoresha kandi wuzuza monomeric, nka zinc diacrylate (ZAD), ishobora guhindurwamo polimeri mugihe cyogusimba kugirango itezimbere ibintu. Izi nshyashya 'zuzuza ' nubusabane bwazo na polymer matrix ntabwo byigeze byigwa mubijyanye nubushyuhe nibintu biterwa ninshuro. Ibishya 'byuzuza ' nubusabane bwabo na polymer matrix ntabwo byigeze byigwa mubijyanye nubushyuhe nibintu biterwa ninshuro.

Hashingiwe ku miterere ya mehaniki na dinamike yimiterere ya HNBR yibirunga kandi itavanze, ibyuzuzo bitandukanye (karubone yumukara, silika na ZDA) byasesenguwe kugirango byuzuzwe. na ZDA) byujujwe ibisanzwe bya HNBR na HXNBR byasesenguwe kubijyanye n'ubushyuhe bushingiye kumiterere yibikorwa.

Kugabanuka kwa modulus hamwe no kwiyongera kwubushyuhe kuri reberi zose zidafite uruhushya (usibye sisitemu yuzuye silika) ni ingaruka ziterwa nubushyuhe bushingiye ku bushyuhe bwa matrix ya polymer. Ubwoko nubunini bwuzuza muri binder bigena gusa urwego rwo gushimangira kandi nta ngaruka bigira ku kugabanuka kwubushyuhe kugabanuka kugabanuka kwa moderi.

Kubikoresho bya silika byuzuye, guhuza ibice bya silika bigena imyitwarire ishingiye kubushyuhe. Niba ubuso bwa silika buvuwe hamwe na silika alkane ivura kugirango ugere kuri hydrophobicity, ihuriro ryibice bya silika birabujijwe. Kuri amplitude nini yo guhindura ibintu, gushimangira ibintu byose byirabura bya karubone na silika byuzuye bishobora gusobanurwa nkimbaraga za hydrodynamic gusa.

Niba ZDA ikoreshwa nkuwuzuza, nta ngaruka zishimangira zigaragara mubintu bya rubber bitavanze kuko ZDA itarashyirwa mubikorwa kandi ikora nka plastike ya molekile nkeya ugereranije. Ibikoresho birimo ZDA byari bifite viscositike nkeya kumurongo wose, byerekana uburyo bwiza bwo gutunganya.

Kugereranya imiterere yubukanishi bwa dinamike hamwe nuburyo bwo guhangayikishwa na reberi yibirunga byerekanaga ko uruganda rwa ZDA rwuzuyemo HXNBR rwuzuye rufite imbaraga nyinshi zuzuzanya nimbaraga nini cyane za mashini (guhangayika no kurambura kuruhuka) byagabanutse hamwe nubushyuhe bwiyongera kuri binders zose. Imikoranire ikomeye hagati yuzuye yuzuza na polymer matrix yongerera ingaruka ubushyuhe kubishimangira ibintu. Nubwo imikoranire ya ionic hagati yitsinda rya ZDA na HXNBR ya carboxyl yagabanije cyane imvune zavunitse, iyi mikoranire ya ionic nta ngaruka yagize ku bushyuhe bw’ubushyuhe bw’imvune zavunitse. Ibi byerekana ko imikoranire ihamye ya ionic hagati ya ZDA na materix ya polymer ikora (HXNBR) nibisabwa kugirango habeho ibikoresho byiza bya mashini na dinamike yibikoresho bya reberi hamwe no gutakaza hystereze nkeya mubihe bigenda bihindagurika.