Hauv kev lag luam roj hmab, qhov kawg tensile lub zog yog ib qho cuab yeej cuab tam tseem ceeb. Qhov kev sim ntsuas no ntsuas qhov kawg ntawm lub zog ntawm cov roj hmab vulcanised. Txawm hais tias cov khoom siv roj hmab tsis tau rub los ze rau nws qhov kawg tensile lub zog, ntau tus neeg siv cov khoom siv roj hmab tseem suav tias yog ib qho tseem ceeb qhia txog qhov zoo ntawm tag nrho cov khoom. Lub zog tensile yog li ntawd ib qho kev qhia dav dav, thiab txawm hais tias qhov kawg ntawm kev siv cov khoom tshwj xeeb muaj me ntsis ua rau nws, cov neeg tsim khoom feem ntau yuav tsum tawm ntawm lawv txoj kev kom tau raws li nws.
1. Cov ntsiab cai dav dav
Yuav kom tau txais lub zog tensile siab tshaj plaws, feem ntau yuav tsum pib nrog elastomers qhov twg strain-induced crystallisation tuaj yeem tshwm sim, xws li NR, CR, IR, HNBR.
2. Ntuj roj hmab NR
Adhesives raws li cov roj hmab ntuj feem ntau muaj lub zog tensile ntau dua li neoprene adhesives. Ntawm ntau qib ntawm cov roj hmab ntuj, No. 1 fume zaj duab xis muaj lub zog tensile siab tshaj plaws. Nws tau raug tshaj tawm tias, yam tsawg kawg yog nyob rau hauv cov ntaub ntawv ntawm cov pa roj carbon dub puv tebchaw, No. 3 fume film muab lub zog tensile zoo dua li No. 1 fume film. Rau tej yam ntuj tso roj hmab tebchaw, tshuaj plasticisers (plastisol) xws li biphenyl amidothiophenol los yog pentachlorothiophenol (PCTP) yuav tsum tau zam, raws li lawv txo lub tensile lub zog ntawm lub compound.
3. Chloroprene CR
Chloroprene (CR) yog strain-induced crystalline roj hmab uas muab lub zog tensile siab thaum tsis muaj fillers. Qhov tseeb, qee zaum lub zog tensile tuaj yeem nce ntxiv los ntawm kev txo qis ntawm cov muab tub lim. Siab molecular luj ntawm CR muab ntau zog tensile zog.
4. Nitrile roj hmab NBR
NBR nrog cov ntsiab lus siab ntawm acrylonitrile (ACN) muab lub zog tensile ntau dua. NBR nrog qhov nqaim molecular hnyav faib muab lub zog tensile ntau dua.
5. Kev cuam tshuam ntawm molecular hnyav
Los ntawm kev ua kom zoo, kev siv NBRs nrog lub siab meniscus viscosity thiab siab molecular hnyav muab lub zog tensile ntau dua.
6. Carboxylated elastomers
Xav txog kev hloov uncarboxylated NBR nrog carboxylated XNBR thiab uncarboxylated HNBR nrog carboxylated XHNBR los txhim kho lub zog tensile ntawm cov compound.
Carboxylated NBR nrog tus nqi tsim nyog ntawm zinc oxide muab lub zog tensile ntau dua li cov pa NBR.
7. EPDM
Kev siv semi-crystalline EPDM (cov ntsiab lus siab ethylene) muab lub zog tensile ntau dua.
8. Reactive EPDM
Hloov tsis hloov EPDM nrog 2% (ntau seem) txiv neej anhydride hloov EPDM hauv kev sib xyaw nrog NR nce lub zog tensile ntawm NR / EPDM cov tebchaw.
9. Gels
Synthetic gels xws li SBR feem ntau muaj stabilizers. Txawm li cas los xij, thaum sib xyaw SBR cov tebchaw ntawm qhov kub siab tshaj 163 ° C, ob qho tib si xoob gels (uas tuaj yeem muab sib xyaw) thiab cov gels nruj (uas tsis tuaj yeem muab sib xyaw thiab tsis sib xyaw hauv qee cov kuab tshuaj) tuaj yeem tsim tau. Ob hom gel txo lub zog tensile ntawm lub compound. Yog li ntawd, qhov sib tov kub ntawm SBR yuav tsum tau kho nrog kev saib xyuas.
10. Vulcanization
Ib txoj hauv kev tseem ceeb kom tau txais lub zog tensile siab yog txhawm rau txhim kho qhov sib txawv ntawm qhov sib txawv, tsis txhob muaj cov sulfurisation, tom qab-vulcanisation thiab tsis txhob blistering ntawm cov roj hmab thaum lub sij hawm vulcanisation vim tsis txaus siab los yog siv cov khoom volatile.
11. Siab-poob vulcanisation
Rau cov khoom vulcanised hauv autoclaves, tsim cov hlwv thiab ua rau txo qis hauv tensile lub zog tuaj yeem zam los ntawm maj mam txo lub siab kom txog thaum kawg ntawm vulcanisation, qhov no yog hu ua 'siab poob vulcanisation'.
12. Vulcanisation lub sij hawm thiab kub
Lub sij hawm ntev vulcanisation ntawm qhov kub qis ua rau muaj kev sib koom ua ke ntawm ntau cov sulfur bonds, siab dua sulfur crosslink ceev thiab yog li lub zog tensile ntau dua.
13. Lub zog tensile tuaj yeem txhim kho los ntawm kev sib xyaw kom zoo dua los txhim kho cov dispersion ntawm reinforcing fillers xws li carbon dub, thaum tsis txhob sib tov ntawm impurities los yog loj undispersed Cheebtsam.
14. Fillers
Rau cov fillers xws li carbon dub los yog silica, kev xaiv ntawm ib tug me me particle loj nrog ib tug loj cheeb tsam yuav ua tau zoo nyob rau hauv kev txhim kho tensile zog. Yuav tsum tsis txhob muaj kev txhawb nqa lossis sau cov khoom siv xws li av nplaum, calcium carbonate, talc, quartz xuab zeb, thiab lwm yam.
15. Carbon dub
Txhawm rau kom ntseeg tau tias cov pa roj carbon dub tau tawg tau zoo, nws cov filling yuav tsum tau nce mus rau qib zoo los txhim kho lub zog tensile. Cov pa roj carbon dub nrog me me particle loj yuav muaj qhov zoo tshaj plaws filling tus nqi. Ua kom cov cheeb tsam tshwj xeeb ntawm cov pa roj carbon dub thiab txhim kho qhov tawg ntawm cov pa roj carbon dub los ntawm kev txuas ntxiv lub voj voog sib xyaw tuaj yeem txhim kho lub zog tensile ntawm cov roj hmab.
16. Dawb carbon dub
Kev siv cov silica precipitated nrog rau thaj chaw siab tshwj xeeb tuaj yeem txhim kho lub zog tensile ntawm cov compound.
17. Cov yas yas
Plasticisers yuav tsum zam yog tias xav tau lub zog tensile siab.
18. Thaum vulcanising NBR tebchaw, cov pa vulcanisation yog yooj yim dua rau disperse tusyees, yog li ntawd, sulfur kho nrog magnesium carbonate yuav disperse zoo dua nyob rau hauv polar tebchaw zoo li NBR. Yog tias tus neeg sawv cev vulcanising tsis zoo dispersed, lub zog tensile tuaj yeem cuam tshuam loj heev.
19. Multi-sulphur bonded crosslinking network
Nrog cov pa vulcanisation systems, crosslinking network yog dominated los ntawm polysulphide bonds; Nrog EV, qhov sib txuas sib txuas sib txuas yog ua tiav los ntawm ib leeg thiab ob chav sulphide bonds, qhov qub ua rau muaj zog tensile ntau dua.
20. Ionic crosslinking tes hauj lwm
Ionic cross-linked compounds muaj lub zog tensile ntau dua vim tias cov ntsiab lus sib txuas tuaj yeem plam thiab yog li txav mus yam tsis raug torn.
21. Kev nyuaj siab crystallisation
Kev sib xyaw ua ke ntawm cov roj hmab ntuj thiab neoprene uas muaj cov khoom siv dag zog hauv cov nplaum yuav pab ua kom lub zog tensile.
