Makhalidwe ndi ntchito tebulo la Nitrile Rubber

Kufotokozera mwatsatanetsatane za mawonekedwe a rabara ya nitrile

Nitrile rabara ndi copolymer ya butadiene ndi acrylonitrile, ndipo acrylonitrile yake yophatikizidwa imakhudza kwambiri makina ake, zomatira, komanso kukana kutentha.Kutengera mawonekedwe a butadiene ndi acrylonitrile monomers, butadiene imakhala ndi polarity yofooka, pomwe acrylonitrile ili ndi polarity yamphamvu.Choncho, kuchuluka kwa acrylonitrile pa unyolo waukulu wa rabara ya nitrile, kumapangitsanso kusinthasintha kwa unyolo waukulu.Kukwera kwa brittleness kutentha kwapamwamba kwambiri, kumakhala koipitsitsa kwambiri kukana kutentha;Kumbali inayi, acrylonitrile imakhala ndi kukana kwabwino kwa kutentha chifukwa pakuwotcha, acrylonitrile mu rabara ya nitrile imatha kupanga zinthu zosungunuka za mowa kuti ziletse kuwonongeka kwa okosijeni.Choncho, kutentha kwa mphira wa nitrile kumawonjezeka ndi kuwonjezeka kwa acrylonitrile;Pakadali pano, chifukwa cha polarity factor ya acrylonitrile, kuwonjezera zomwe zili mu acrylonitrile zimatha kupititsa patsogolo mphamvu zomatira za rabara ya nitrile.Choncho, ndikofunika kwambiri kuyesa zomwe zili mu acrylonitrile womangidwa mu mphira wa nitrile.

Zomwe zili mu acrylonitrile zimakhudza kwambiri ntchito ya NBR.Zomwe zili mu acrylonitrile mu rabala ya acrylonitrile nitrile zili pakati pa 15% ndi 50%.Ngati zinthu za acrylonitrile zikuwonjezeka kufika pa 60%, zimakhala zolimba, zofanana ndi zikopa, ndipo sizikhalanso ndi mphira.

1. Kukana kwamafuta ndi kukana zosungunulira: Labala ya Nitrile imakhala ndi kukana kwamafuta mu rabala wamba.Labala ya Nitrile imagonjetsedwa ndi mafuta a petroleum, benzene, ndi zosungunulira zina zosakhala polar kuposa mphira wachilengedwe, mphira wa styrene butadiene, rabala wa butyl, ndi mphira wina wopanda polar, komanso ndi wabwino kuposa mphira wothira polar.Komabe, mphira wa nitrile sulimbana bwino ndi mafuta a polar ndi zosungunulira (monga ethanol), koma kukana kopanda mphira wopanda polar.

2. Mawonekedwe a thupi: Rabara ya Nitrile ndi mawonekedwe osasinthika a nitrile copolymers omwe samawunikira pansi pa kupsinjika.Chifukwa chake, mawonekedwe akuthupi komanso amakina a rabala yoyera ya nitrile ndi yofanana ndi ya rabara ya styrene nitrile, yotsika kwambiri kuposa mphira wachilengedwe.Pambuyo powonjezera zowonjezeretsa monga kaboni wakuda ndi phenolic resin, kulimba kwa mphira wopangidwa ndi nitrile kumatha kufika pamlingo wa mphira wachilengedwe, nthawi zambiri pafupifupi 24.50mpa.Pamene ma polarity a NBR akuwonjezeka, kusinthasintha kwa macromolecular chain kumachepa, mphamvu ya atomiki pakati pa mamolekyu imawonjezeka, zomangira ziwiri zimachepa, ndipo unyolo wa macromolecular umakhala wosasunthika, zomwe zimapangitsa kuti pakhale kusintha kwa machitidwe.Zomwe zili mu ACN zikakhala pakati pa 35% ndi 40%, ndizomwe zimafunikira pakupanikizana, kulimba, komanso kulimba pa 75 ℃.Ngati kukana kwamafuta kukukwaniritsa zofunikira, mitundu yokhala ndi ACN yochepera 40% iyenera kugwiritsidwa ntchito momwe mungathere.Kutanuka kwa mphira wa nitrile ndikocheperako kuposa mphira wachilengedwe ndi rabala wa styrene butadiene.Kuthamanga kwa NBR kumagwirizana kwambiri ndi kutentha.Poyerekeza ndi NBR, mwayi wa kutentha ndi kuwonjezeka kwa elasticity ndi waukulu.Chifukwa chake, mphira wa nitrile ndiwoyenera kwambiri popanga zotsekemera zotsekemera zokhala ndi mafuta ambiri.Makhalidwe a elasticity ya mphira wa nitrile kusintha ndi kumanga kwa acrylonitrile

3. Mpweya: Mpira wa Nitrile uli ndi mpweya wabwino kwambiri kuposa mphira wachilengedwe ndi mphira wa styrene butadiene, koma siwofanana ndi mphira wa polysulfide, womwe umafanana ndi mphira wa butyl.

4. Kuchita kwa kutentha kwapansi: Labala ya Nitrile imakhala ndi kutentha kochepa kwambiri mu rabala.Kuchita kwa kutentha kwapansi kumakhudzana ndi zomwe zili mu acrylonitrile, ndipo kutentha kwa magalasi kumawonjezeka ndi kuwonjezeka kwa acrylonitrile.Ikhoza kuchepetsa kutentha kwa galasi la mphira wa nitrile ndikuwongolera ntchito yake yotsika.

5. Kutentha kwa kutentha: Rabara ya Nitrile imakhala ndi kutentha kwabwino kuposa mphira wachilengedwe ndi rabala ya styrene butadiene.Posankha chilinganizo choyenera, mankhwala a rabara a nitrile angagwiritsidwe ntchito mosalekeza pa 120 ℃;Imatha kupirira mafuta otentha pa 150 ℃;Ikaviika mumafuta pa 191 ℃ kwa maola 70, imakhalabe ndi mphamvu yopindika.6. Kukana kwa ozoni: Labala ya Nitrile ilibe mphamvu yolimbana ndi ozoni ndipo nthawi zambiri imapangidwa bwino powonjezera zinthu zolimbana ndi ozoni.Komabe, zinthu zomwe zimakumana ndi mafuta pakugwiritsa ntchito zimakhala zosavuta kuchotsa ozoni osamva komanso kutaya kukana kwake kwa ozone.Kuphatikiza ndi PVC, zotsatira zake ndizofunika kwambiri.

7. Kukana madzi: Labala ya Nitrile imakhala ndi madzi abwino kwambiri.Zomwe zili pamwamba pa acrylonitrile, zimakhala bwino kukana madzi.

8. Ntchito yotchinjiriza magetsi: Labala ya Nitrile ili ndi mphamvu yotseketsa magetsi chifukwa cha polarity yake.Ndi mphira wa semiconductor ndipo sayenera kugwiritsidwa ntchito ngati zotchingira.

9. Kukana kukalamba: NBR popanda anti-aging agents ali ndi vuto losakalamba kwambiri, pamene NBR yokhala ndi anti-aging agents imakhala ndi ukalamba wabwino komanso kutentha kwapakati kuposa mphira wachilengedwe.Pambuyo pa ukalamba wotenthedwa wa okosijeni, mphamvu ya mphira wachilengedwe imachepa kwambiri, koma kuchepa kwa mphira wa nitrile kumakhala kochepa kwambiri.

Kukana kutentha kwa mphira wa nitrile ndikofanana ndi kukana kwake kukalamba.Pamene L0000H zaka pa 100 ℃, elongation ake akhoza kupitirira 100%.Mankhwala a mphira wa Nitrile angagwiritsidwe ntchito kwa nthawi yochepa pa 130 ° C ndipo angagwiritsidwe ntchito pa kutentha kwakukulu popanda mpweya.Chifukwa chake, mphira wa nitrile umalimbana bwino ndi kutentha kuposa mphira wachilengedwe ndi mphira wa styrene butadiene.Ngakhale kuposa mphira wa chloroprene.Rabara ya Nitrile imakhala ndi nyengo yofanana ndi kukana kwa ozoni ngati mphira wachilengedwe, koma yotsika pang'ono kuposa mphira wachilengedwe.Kuonjezera polyvinyl chloride ku mphira wa nitrile kumatha kusintha kukana kwake kwa nyengo komanso kukana kwa ozoni.

10. Kukana kwa radiation:

mphira wa Nitrile ukhozanso kuonongeka pansi pa cheza cha nyukiliya, zomwe zimabweretsa kuwonjezeka kwa kuuma komanso kuchepa kwa kutalika.Komabe, poyerekeza ndi ma rubber opangidwa, NBR imakhudzidwa pang'ono ndi ma radiation, ndipo NBR yokhala ndi acrylonitrile ya 33% -38% imakhala ndi kukana bwino kwa radiation.Pambuyo pa ma radiation a nyukiliya, mphamvu yamphamvu ya NBR yokhala ndi acrylonitrile yapamwamba imatha kuwonjezeka ndi 140%.Izi ndichifukwa choti NBR yokhala ndi ma acrylonitrile otsika idzawonongeka ndi ma radiation, pomwe NBR yokhala ndi ma acrylonitrile okwera idzakumana ndi ma radiation a nyukiliya.

Table Magwiridwe a Nitrile Rubber

Zinthu zakuthupi zomwe zimagwiritsidwa ntchito mphira wopangira