Kev faib tawm thiab cov yam ntxwv ntawm cov roj hmab tshwj xeeb

Cov roj hmab ua los ntawm cov khoom siv yog ib qho ntawm peb yam khoom siv tseem ceeb thiab siv dav hauv ntau yam kev lag luam, kev tiv thaiv lub teb chaws, kev thauj mus los thiab kev ua neej txhua hnub. Cov roj hmab ua los ntawm cov khoom siv ua tau zoo thiab ua haujlwm tau zoo yog cov khoom siv tseem ceeb rau kev txhim kho lub caij nyoog tshiab, thiab nws kuj yog ib qho khoom siv tseem ceeb rau lub teb chaws.

Cov khoom siv roj hmab tshwj xeeb yog hais txog cov khoom siv roj hmab uas txawv ntawm cov khoom siv roj hmab dav dav thiab muaj cov khoom tshwj xeeb xws li kev tiv taus kub thiab qis, kev laus tiv taus, kev tiv taus ablation, thiab kev tiv taus tshuaj lom neeg, feem ntau yog roj hmab hydrogenated nitrile (HNBR), thermoplastic vulcanizate (TPV), Silicone roj hmab, roj hmab fluorine, roj hmab fluorosilicone, roj hmab acrylate, thiab lwm yam. Vim nws cov khoom tshwj xeeb, cov khoom siv roj hmab tshwj xeeb tau dhau los ua cov khoom tseem ceeb rau kev tsim cov tswv yim tseem ceeb hauv tebchaws thiab cov teb tshiab xws li aerospace, kev tiv thaiv lub tebchaws thiab kev lag luam tub rog, cov ntaub ntawv hluav taws xob, lub zog, ib puag ncig, thiab dej hiav txwv.

1. Cov roj hmab hydrogenated nitrile (HNBR)

Cov roj hmab nitrile hydrogenated yog cov roj hmab uas muaj roj ntau heev uas tau los ntawm kev xaiv cov hydrogenating butadiene units ntawm cov saw roj hmab nitrile rau lub hom phiaj ntawm kev txhim kho qhov kub thiab txias tsis kam thiab kev laus tsis kam ntawm nitrile butadiene roj hmab (NBR). , nws lub ntsiab feature yog tias nws tuaj yeem siv tau ntev ntawm 150 ℃, thiab nws tseem tuaj yeem tswj tau cov khoom siv lub cev thiab cov khoom siv kho tshuab siab ntawm qhov kub siab, uas tuaj yeem ua tau raws li qhov xav tau tshwj xeeb ntawm kev tiv taus kub thiab tshuaj lom neeg ntawm cov ntaub ntawv hauv tsheb, aerospace, roj teb thiab lwm yam teb. Cov kev xav tau, ntau dua thiab ntau dua siv dav, xws li cov roj foob tsheb, cov khoom siv roj, cov siv tsheb kis, cov thawv tuav thiab cov pistons rau av nkos, luam ntawv thiab textile roj hmab rollers, aerospace foob, cov ntaub ntawv nqus dej poob siab, thiab lwm yam.

2. Thermoplastic Vulcanizate (TPV)

Cov thermoplastic vulcanizates, luv ua TPVs, yog ib chav kawm tshwj xeeb ntawm cov thermoplastic elastomers uas tsim los ntawm "dynamic vulcanization" ntawm cov khoom sib xyaw ua ke ntawm cov thermoplastics thiab elastomers, piv txwv li kev xaiv ntawm theem elastomer thaum lub sijhawm sib tov nrog cov thermoplastic Sexual cross-linking. Kev sib xyaw ua ke ntawm cov roj hmab theem nyob rau hauv qhov muaj tus neeg sawv cev crosslinking (tej zaum peroxides, diamines, sulfur accelerators, thiab lwm yam) thaum lub sijhawm sib xyaw nrog cov thermoplastics ua rau muaj cov thermoplastic matrix dynamic vulcanizate txuas ntxiv uas muaj cov roj hmab sib xyaw ua ke. Cov khoom me me hauv theem, dynamic vulcanization ua rau muaj kev nce hauv cov roj hmab viscosity, uas txhawb nqa theem inversion thiab muab ntau theem morphology hauv TPV. TPV muaj ob qho kev ua tau zoo ib yam li cov roj hmab thermosetting thiab qhov ceev ntawm cov thermoplastics, uas feem ntau pom tseeb hauv kev ua tau zoo / tus nqi piv, tsim qauv yooj ywm, lub teeb yuag, dav dav kub ua haujlwm, yooj yim ua, khoom zoo thiab qhov ntev ruaj khov Thiab rov ua dua tshiab, siv dav hauv cov khoom siv tsheb, kev tsim hluav taws xob, cov ntsaws ruaj ruaj thiab lwm yam teb.

3. Cov roj hmab silicone

Cov roj hmab silicone yog ib hom roj hmab tshwj xeeb uas ua los ntawm cov polysiloxane linear sib xyaw nrog cov khoom siv ntxiv, cov khoom siv ntxiv thiab cov khoom ntxiv, thiab tom qab vulcanization ua rau lub network zoo li elastomer. Nws muaj kev tiv taus kub thiab txias zoo heev, tiv taus huab cua, tiv taus ozone, tiv taus arc, rwb thaiv tsev hluav taws xob, tiv taus dej noo, huab cua permeability siab thiab physiological inertia. Nws muaj ntau yam kev siv hauv kev lag luam niaj hnub, hluav taws xob thiab hluav taws xob, tsheb, kev tsim kho, kev kho mob, kev saib xyuas tus kheej thiab lwm yam, thiab tau dhau los ua cov khoom siv ua tau zoo hauv kev lag luam aerospace, kev tiv thaiv thiab tub rog, kev tsim khoom ntse thiab lwm yam.

4. Cov roj hmab fluorine

Fluorine roj hmab yog hais txog cov khoom siv roj hmab uas muaj fluorine uas muaj cov fluorine atoms nyob rau ntawm cov atoms carbon ntawm cov saw hlau tseem ceeb lossis cov saw hlau sab. Nws cov khoom tshwj xeeb yog txiav txim siab los ntawm cov yam ntxwv ntawm cov fluorine atoms. Fluorine roj hmab tuaj yeem siv tau ntawm 250 ° C ntev, thiab qhov kub siab tshaj plaws tuaj yeem ncav cuag 300 ° C, thaum qhov kub txwv ntawm EPDM thiab butyl roj hmab ib txwm muaj tsuas yog 150 ° C. Ntxiv nrog rau kev tiv thaiv kub siab, fluororubber muaj kev tiv thaiv roj zoo heev, kev tiv thaiv tshuaj lom neeg, kev tiv thaiv acid thiab alkali, thiab nws cov kev ua tau zoo yog qhov zoo tshaj plaws ntawm txhua cov ntaub ntawv roj hmab elastomer. Nws feem ntau yog siv rau kev tiv thaiv roj ntawm rockets, missiles, dav hlau, nkoj, tsheb thiab lwm yam tsheb. Cov teb tshwj xeeb xws li kev sib khi thiab cov kav dej tiv thaiv roj yog cov khoom tseem ceeb rau kev lag luam hauv tebchaws thiab kev tiv thaiv tebchaws thiab kev lag luam tub rog.

5. Acrylate roj hmab (ACM)

Acrylate roj hmab (ACM) yog ib qho elastomer tau los ntawm kev sib xyaw ua ke ntawm acrylate ua lub ntsiab monomer. Nws cov saw hlau tseem ceeb yog cov saw hlau carbon saturated, thiab nws cov pab pawg sab yog cov pab pawg polar ester. Vim nws cov qauv tshwj xeeb, nws muaj ntau yam zoo heev, xws li kev tiv taus cua sov, kev laus tiv taus, kev tiv taus roj, kev tiv taus ozone, kev tiv taus UV, thiab lwm yam., nws cov khoom siv kho tshuab thiab cov khoom ua tiav zoo dua li fluororubber thiab silicone roj hmab, thiab nws cov cua sov tiv taus, kev laus tiv taus thiab kev tiv taus roj zoo heev. Hauv roj hmab nitrile. ACM siv dav hauv ntau qhov chaw kub thiab roj-resistant, thiab tau dhau los ua cov khoom siv sealing tsim thiab txhawb nqa los ntawm kev lag luam tsheb hauv xyoo tas los no.