Qee cov yam ntxwv ntawm cov roj hmab

1. Reflecting roj hmab zoo li elasticity

Roj hmab yog qhov sib txawv ntawm lub zog elastic uas cuam tshuam los ntawm qhov ntev elastic coefficient (Young's modulus).Nws hais txog qhov hu ua "rubber elasticity" uas tuaj yeem rov qab tau txawm tias ntau pua feem pua ​​​​ntawm deformation raws li entropy elasticity tsim los ntawm kev cog lus thiab thim rov qab ntawm molecular locks.

2. Reflecting viscoelasticity ntawm roj hmab

Raws li Hooke txoj cai, lub cev hu ua viscoelastic nrog cov khoom nruab nrab ntawm lub cev elastic thiab cov kua dej tiav.Qhov ntawd yog hais tias, rau cov kev ua xws li deformation los ntawm sab nraud quab yuam, lawv yog dominated los ntawm lub sij hawm thiab kub tej yam kev mob, thiab nthuav phenomena ntawm creep thiab kev nyuaj siab so.Thaum lub sij hawm vibration, muaj ib theem sib txawv ntawm kev ntxhov siab thiab deformation, uas kuj qhia hysteresis poob.Lub zog poob yog manifested nyob rau hauv daim ntawv ntawm tshav kub tiam raws li nws qhov loj.Ntxiv mus, nyob rau hauv dynamic phenomena, periodic dependence yuav tsum tau pom, uas yog siv rau lub sij hawm kub hloov txoj cai.

3. Nws muaj kev ua haujlwm ntawm kev tiv thaiv kev vibration thiab buffering

Kev sib cuam tshuam ntawm softness, elasticity, thiab viscoelasticity ntawm roj hmab qhia tau hais tias nws muaj peev xwm txo tau suab thiab vibration kis tau tus mob.Yog li nws yog siv nyob rau hauv kev ntsuas los txo cov suab nrov thiab kev co muaj kuab paug.

4. Muaj qhov tseem ceeb nyob ntawm qhov kub thiab txias

Tsis tsuas yog roj hmab, tab sis ntau lub cev ntawm cov ntaub ntawv polymer feem ntau cuam tshuam los ntawm qhov kub thiab txias, thiab roj hmab muaj lub siab nyiam ntawm viscoelasticity, uas tseem cuam tshuam rau qhov kub thiab txias.Zuag qhia tag nrho, roj hmab yog nquag embrittlement ntawm qhov kub thiab txias;Thaum qhov kub thiab txias, cov txheej txheem xws li softening, dissolution, thermal oxidation, thermal decomposition, thiab combustion yuav tshwm sim.Tsis tas li ntawd, vim roj hmab yog cov organic, nws tsis muaj nplaim taws.

5. Cov yam ntxwv ntawm hluav taws xob rwb thaiv tsev

Ib yam li cov yas, roj hmab yog qhov qub insulator.Siv rau hauv rwb thaiv tsev ntawm daim tawv nqaij thiab lwm yam, cov yam ntxwv ntawm hluav taws xob rwb thaiv tsev kuj raug cuam tshuam los ntawm kev sib txawv formulations.Tsis tas li ntawd, muaj cov roj hmab conductive uas nquag txo cov rwb thaiv tsev tiv thaiv kom tsis txhob muaj hluav taws xob.

6. Kev laus tshwm sim

Piv nrog rau kev xeb ntawm cov hlau, ntoo, pob zeb, thiab kev puas tsuaj ntawm cov yas, cov khoom hloov pauv los ntawm ib puag ncig yog hu ua aging phenomena hauv kev lag luam roj hmab.Zuag qhia tag nrho, nws yog ib qho nyuaj rau hais tias roj hmab yog ib yam khoom uas zoo heev durability.UV rays, tshav kub, oxygen, ozone, roj, kuab tshuaj, tshuaj, kev nyuaj siab, kev co, thiab lwm yam yog lub ntsiab ua rau kev laus.

7. Yuav tsum tau ntxiv sulfur

Cov txheej txheem ntawm kev sib txuas ntawm cov saw zoo li polymers ntawm roj hmab nrog leej faj lossis lwm yam tshuaj hu ua sulfur ntxiv.Vim qhov txo qis ntawm cov yas ntws, qhov formability, lub zog, thiab lwm yam khoom siv lub cev tau txhim kho, thiab qhov kub thiab txias ntawm kev siv tau nthuav dav, ua rau kev ua tau zoo dua qub.Ntxiv rau sulfur sulfidation haum rau elastomers nrog ob daim ntawv cog lus, kuj tseem muaj peroxide sulfidation thiab ammonium sulfidation siv peroxides.Hauv cov roj hmab thermoplastic, tseem hu ua roj hmab zoo li cov yas, kuj tseem muaj cov uas tsis tas yuav muaj leej faj ntxiv.

8. Cov qauv tsim nyog

Hauv cov roj hmab hluavtaws, kev zam yog ua rau qhov kev tsim xws li polyurethane tsis tas yuav tsum tau (tshwj tsis yog rau cov neeg ua haujlwm crosslinking).Feem ntau, roj hmab yuav tsum muaj ntau yam formulations.Nws yog ib qho tseem ceeb uas yuav tsum tau xa mus rau hom thiab tus nqi ntawm formulation xaiv raws li "tsim ib tug formula" nyob rau hauv roj hmab ua technology.Qhov hloov maj mam ntawm cov qauv siv tau raws li lub hom phiaj thiab kev ua tau zoo yuav tsum tau hais tias yog cov cuab yeej siv los ntawm ntau lub tuam txhab ua.

9. Lwm yam nta

(a) Lub ntiajteb txawj nqus tshwj xeeb

Hais txog cov roj hmab nyoos, cov roj hmab ntuj yog li ntawm 0.91 txog 0.93, EPM yog qhov tsawg tshaj plaws ntawm 0.86 txog 0.87, thiab fluororubber yog qhov loj tshaj plaws ntawm 1.8 txog 2.0.Cov roj hmab tswv yim sib txawv raws li cov qauv, nrog rau lub ntiajteb txawj nqus ntawm li 2 rau carbon dub thiab sulfur, 5.6 rau cov hlau sib txuas xws li zinc oxide, thiab kwv yees li 1 rau cov organic formulations.Feem ntau, qhov tshwj xeeb lub ntiajteb txawj nqus yog li ntawm 1 mus rau 2. Tsis tas li ntawd, nyob rau hauv cov xwm txheej tshwj xeeb, kuj tseem muaj cov khoom siv hnyav xws li soundproof films uas muaj cov hmoov txhuas.Zuag qhia tag nrho, piv rau cov hlau thiab lwm yam khoom siv, nws tuaj yeem hais tau sib dua.

(b) Hardness

Zuag qhia tag nrho, nws zoo li mos.Txawm hais tias muaj ntau yam nrog cov tawv tawv hauv qab, nws tseem tuaj yeem tau txais cov nplaum tawv zoo ib yam li cov roj hmab polyurethane, uas tuaj yeem hloov pauv raws li cov qauv sib txawv.

(c) Ua pa

Zuag qhia tag nrho, nws yog ib qho nyuaj rau siv cua thiab lwm yam gases raws li cov khoom sib khi.Butyl roj hmab muaj zoo heev uas tsis yog breathability, thaum silicone roj hmab yog kuj yooj yim dua breathable.

(d) Waterproofing

Zuag qhia tag nrho, nws muaj cov khoom tsis muaj dej, qhov nqus dej ntau dua li cov yas, thiab tuaj yeem ncav cuag ntau kaum feem pua ​​​​ntawm cov dej kub npau npau.Ntawm qhov tod tes, nyob rau hauv cov nqe lus ntawm dej tsis kam, vim yog yam xws li kub, lub sij hawm immersion, thiab kev cuam tshuam ntawm cov kua qaub thiab alkali, polyurethane roj hmab yog zoo li yuav undergo dej splitting.

(e) Tshuaj tiv thaiv

Zuag qhia tag nrho, nws muaj zog tiv thaiv cov tshuaj inorganic, thiab yuav luag tag nrho cov roj hmab tuaj yeem tiv taus qis qis ntawm alkali.Ntau cov roj hmab ua nkig thaum sib cuag nrog cov muaj zog oxidizing acids.Txawm hais tias nws muaj peev xwm tiv taus cov roj fatty acids xws li cov tshuaj organic xws li cawv thiab ether.Tab sis nyob rau hauv hydrogen carbide, acetone, carbon tetrachloride, carbon disulfide, phenolic tebchaw, thiab lwm yam, lawv tau yooj yim invaded thiab ua o thiab tsis muaj zog.Tsis tas li ntawd, nyob rau hauv cov nqe lus ntawm cov roj kuj, ntau muaj peev xwm tiv taus cov tsiaj thiab zaub roj, tab sis lawv yuav deform thiab yog nquag o thaum nyob rau hauv kev sib cuag nrog roj av.Tsis tas li ntawd, nws tseem cuam tshuam los ntawm yam xws li hom roj hmab, hom thiab tus nqi ntawm kev tsim, thiab kub.

(f) Hnav tsis kam

Nws yog ib tug yam ntxwv uas yuav tsum tau tshwj xeeb tshaj yog nyob rau hauv lub teb ntawm log tsheb, nyias siv, khau, thiab lwm yam. Piv rau hnav los ntawm slipping, ntxhib hnav yog ntau ntawm cov teeb meem.Polyurethane roj hmab, roj hmab ntuj, roj hmab butadiene, thiab lwm yam muaj kev hnav zoo heev.

(g) Kev qaug zog

Nws yog hais txog lub durability thaum rov deformation thiab vibration.Txawm hais tias qhov kev nrhiav yog qhov nyuaj los tsim cov kab nrib pleb thiab kev vam meej vim yog cua sov, nws kuj muaj feem xyuam rau cov khoom siv hloov pauv los ntawm kev siv tshuab.SBR yog superior rau cov roj hmab ntuj nyob rau hauv cov nqe lus ntawm tawg tiam, tab sis nws txoj kev loj hlob tus nqi yog ceev thiab heev tsis zoo.Kev cuam tshuam los ntawm hom roj hmab, amplitude ntawm quab yuam, deformation ceev, thiab tus neeg sawv cev txhawb zog.

(h) Lub zog

Roj hmab muaj zog tensile (pob txha lub zog, elongation,% modulus), compressive zog, shear zog, tsim kua muag zog, thiab lwm yam. Muaj cov nplaum zoo li polyurethane roj hmab uas yog cov roj hmab ntshiab uas muaj lub zog loj, nrog rau ntau cov roj hmab uas tau txhim kho los ntawm kev sib xyaw ua ke. cov tshuaj tiv thaiv thiab cov tshuaj tiv thaiv.

(i) nplaim tsis kam

Nws yog hais txog kev sib piv ntawm ignitability thiab combustion tus nqi ntawm cov ntaub ntawv thaum lawv los rau hauv kev sib cuag nrog hluav taws.Txawm li cas los xij, dripping, toxicity ntawm cov roj tsim tawm, thiab cov pa luam yeeb yog qhov teeb meem.Vim tias roj hmab yog cov organic, nws tsis tuaj yeem ua tsis tau nplaim taws, tab sis nws tseem tab tom txhim kho cov nplaim hluav taws, thiab tseem muaj cov roj hmab nrog cov nplaim hluav taws zoo li fluororubber thiab chloroprene roj hmab.

(j) Adhesiveness

Zuag qhia tag nrho, nws muaj adhesion zoo.Dissolved nyob rau hauv ib tug hnyav thiab raug rau adhesive ua, txoj kev no muaj peev xwm ua tiav cov nplaum nplaum ntawm cov roj hmab system.Cov log tsheb thiab lwm yam khoom siv tau koom ua ke raws li kev ntxiv sulfur.Cov roj hmab ntuj thiab SBR yog siv rau hauv kev sib txuas ntawm roj hmab rau roj hmab, roj hmab rau fiber ntau, roj hmab rau yas, roj hmab rau hlau, thiab lwm yam.

(k) Toxicity

Hauv kev tsim cov roj hmab, qee qhov stabilizers thiab plasticizers muaj cov khoom tsis zoo, thiab cadmium raws li pigments yuav tsum tau sau tseg.