To vovo na thermoplastics la, zi geɖe la, wozãa elastomers le dzoxɔxɔ vovovowo me eye wòwua woƒe glass transition temperature (TG) ŋutɔ. Viɖe siwo le elastomers ŋu wu thermoplastics lae nye woƒe ŋutete be woahaya keŋkeŋ kloe tso tensile state (high elasticity), kpakple woƒe generalized elasticity, low hardness kple modulus ƒe nɔnɔme siwo bɔbɔ. Ne wozã elastomers le xɔme ƒe dzoxɔxɔ te la, woɖea sesẽme ƒe dzidziɖedzi fiana, modulus ƒe dzidziɖedzi, kple elasticity dzi ɖeɖe kpɔtɔ. Ne wozã elastomers le xɔme ƒe dzoxɔxɔ te la, nɔnɔme aɖe li be sesẽme nadzi ɖe edzi, modulus nadzi ɖe edzi, elasticity be wòaɖe edzi akpɔtɔ (bɔbɔe tensile) kple compression set be wòadzi ɖe edzi. Le elastomer ƒe kuxia nu la, nudzɔdzɔ eve ateŋu adzɔ le ɣeyiɣi ɖeka me - glass ƒe sesẽ kple kristalo ƒe akpa aɖe - Cr, EPDM, NR nye elastomers ƒe kpɔɖeŋu aɖewo siwo ɖea kristalowɔwɔ fiana.
1. Dzoxɔxɔ ƒe dodokpɔ si me dzoxɔxɔ mele o ƒe wɔwɔfia .
Wozãa brittleness, compression permanent deformation, retraction, hardening kple cryogenic hardening ƒe geɖe be woatsɔ ade dzesi polymer nɔnɔmewo le dzoxɔxɔ si bɔbɔ me. Compressive stress relaxation nye nu yeye aɖe eye wòléa ŋku ɖe nusi wotsɔ xea nu ƒe nutrenu ƒe ŋusẽ ŋu le ɣeyiɣi aɖe me le nutome ƒe nɔnɔme vovovowo me.
2. brittleness ƒe dzoxɔxɔ .
ASTM D 2137 ɖe brittleness dzoxɔxɔ gɔme be enye dzoxɔxɔ si bɔbɔ wu si me vulcanized rababa maɖe gbagbã alo gbagbã le nɔnɔme siwo woɖo ɖi me o. Wodzraa rababa atɔ̃ siwo ƒe nɔnɔme woɖo ɖi do ŋgɔ ɖo, wodaa wo ɖe xɔ alo tsi me, wotsɔa dzoxɔxɔ si woɖo ɖi la dea eme hena 3±0.5min, eye emegbe wonaa 2.0±0.2m/s ƒe ŋusẽkpɔɖeamedzi ƒe sesẽme. Woɖea lã siwo wowɔ la ɖa eye wodoa wo kpɔ be woawɔ dɔ ɖe ame dzi alo ado wo kpɔ. Woɖea kpɔɖeŋua ɖa hedoa wo kpɔna be edze ame dzi alo gbã, eye wo katã megblẽ o. Wogbugbɔ dodokpɔa wɔ vaseɖe dzoxɔxɔ si le brittleness me - dzoxɔxɔ si bɔbɔ wu si me womekpɔ gbagbãƒe aɖeke le o la gogo 1°C ŋutɔ.
3. Dzoxɔxɔ si bɔbɔ ɖe anyi ƒe nutete ƒe ɖoɖo kple dzoxɔxɔ si le bɔbɔe ƒe sesẽ .
Dodokpɔ ƒe ɖoɖo si wowɔ na dzoxɔxɔ sue ƒe nutete ƒe hatsotso la te ɖe esi na nutete ƒe ɖoɖo si wozãna ɖaa ŋu ŋutɔ, negbe ɖe wotsɔ ŋusẽ ƒe mɔnu aɖewo, abe tsikpe ƒuƒu, nitrogen si nye tsi, alo mɔ̃ɖaŋununya ene, kpɔ dzoxɔxɔa dzi, eye asixɔxɔa le dzoxɔxɔ si woɖo ɖi la me le ± 1°C me. Ne wogaxɔe tso fixture la me vɔ la, wotsɔa kpɔɖeŋua hã dana ɖe dzoxɔxɔ si le bɔbɔe si woɖo ɖi la dzi eye wotsɔa eƒe didime nyea milimeta 29 eye eƒe titrime nyea milimeta 12.5. Dzoxɔxɔ sue ƒe nutete ƒe hatsotso nye mɔnu si metso tẽ o hena nutrenu zazã ɖe atike si ŋu nya ku ɖo ŋu. Compressive stress relaxation nye mɔnu si wozãna tẽ eye woaƒo nu tso eŋu emegbe. Zi geɖe la, wozãa Vulcanized compression set specimen (29mm x 12.5mm) hã zi geɖe, gake wogadoe kpɔ le dzoxɔxɔ si bɔbɔ me, si nye esi sɔ kple esi wowɔ na compression set, eye emegbe wogadoe ɖe dzoxɔxɔ si sɔ kple woƒe dzoxɔxɔ si woɖo la me. Sesẽme kple dzoxɔxɔ sue ƒe nutete ƒe hatsotso la kpɔa ŋusẽ ɖe fafa dzi tẽ, gake hã to polymer la ƒe nɔnɔme be wòanye kristalo, kple kristalo ƒe tsɔtsɔme si nɔ te ɖe dzoxɔxɔ dzi, le kpɔɖeŋu me, Cr crystallizes kabakaba wu le -10°C me, eye emegbe wòɖina ɖe anyi le kɔsɔkɔsɔ ƒe akpa si le anyigba dzi, vevietɔ le esi wowɔe le megbeƒuƒu me ta).
4. Gehman ƒe dzoxɔxɔ si le bɔbɔe ƒe sesẽ .
ASTM D 1053 ƒo nu tso dzoxɔxɔ ƒe sesẽme ƒe sesẽ mɔnu ŋu ale: wotsɔa elastic polymer ƒe kpɔɖeŋu siwo kplɔ wo nɔewo ɖo la blana ɖe ka si wonya be torsional constant si wonya ŋu, eye wotsɔa ka la ƒe nugbɔ kemɛa blaa ta si te ŋu ɖea mɔ be woatro ka la. Wonyrɔa lãmenugbagbeviawo ɖe dzoxɔxɔ ƒe mɔ̃ me le dzoxɔxɔ tɔxɛ aɖe si le dzɔdzɔme nu me, eye le ɣeyiɣi sia me la, wotsɔa 180° troa torsion ta la, eye emegbe wotsɔa agbɔsɔsɔ (si mede 180° o) troa lãawo ƒe nɔnɔme si nye inverse of the specimen's flexibility and sthickness. Emegbe zã goniometer ƒe agbɔsɔsɔme nàtsɔ anya alesi gbegbe wowɔ kpɔɖeŋui ƒe agbɔsɔsɔme, dzogoe si dzi wotroe le kple alesi rababa la sesẽe. Wodzia ɖoɖoa ƒe dzoxɔxɔ ɖe edzi vivivi le teƒe sia, eye wokpɔa dzogoe si wotsɔ trɔa asi le dzoxɔxɔ ŋu ƒe nɔnɔmetata. Woŋlɔa dzoxɔxɔ siwo me modulus la ɖoa T2, T10, kple T100 le zi geɖe be wosɔ kple modulus ƒe asixɔxɔ le xɔme ƒe dzoxɔxɔ me.
5. Dzoxɔxɔ si bɔbɔ ɖe anyi (TR dodokpɔ) .
Wozãa TR dodokpɔa tsɔ daa ŋutete si le kpɔɖeŋu aɖe ŋu le tensile nɔnɔme me ne wozã compressive permanent deformation kple compressive stress relaxation si wokpɔ to compressive stress me tsɔ de dzesi dzoxɔxɔ ƒe ŋusẽkpɔɖeamedzi siwo bɔbɔ. Abe alesi míekpe va yi ene la, polymer geɖe abe NR kple PVC ene awɔ kristalo le dzoxɔxɔ si bɔbɔ me, gake kekeɖenu ate ŋu awɔ kristalo hã, si ana woakpɔ nu bubuwo ne wole ŋku lém ɖe dzoxɔxɔ ƒe nɔnɔme siwo bɔbɔ ŋu. Le dodokpɔ ƒe dɔbiagbalẽviwo abe yaƒoƒo ƒe ʋuʋudedi ene gome la, TR le tension te sɔ ŋutɔ eye wozãnɛ enuenu. Le dodokpɔ sia me la, wodidia kpɔɖeŋua ɖe edzi (zi geɖe la, 50% alo 100%) eye wotsia tsikpe me le nɔnɔme didi me. Woɖea asi le kpɔɖeŋua ŋu, eye le ɣeyiɣi sia me la, wodoa dzoxɔxɔa ɖe dzi le agbɔsɔsɔ si woɖo ɖi me be woatsɔ adzidze nusi wotsɔ wɔ kpɔɖeŋua ƒe gbugbɔgadzɔ, wodzidzea ʋuʋudedi ƒe didime eye woŋlɔa didime la ɖi. Zi geɖe la, dzoxɔxɔ si me lãmenugbagbeviwo ƒe wɔwɔme dzi ɖena kpɔtɔna le 10%, 30%, 50%, kple 70% nyea TR10, TR30, TR50, kple TR70. TR10 ku ɖe dzoxɔxɔ si le brittleness ŋu; TR70 ku ɖe kpɔɖeŋua ƒe nɔnɔmetɔtrɔ tegbee le dzoxɔxɔ si mebɔ o ƒe nutete me ŋu; eye wozãa vovototo si le TR10 kple TR70 dome tsɔ dzidzea kpɔɖeŋua ƒe kristalowɔwɔ (zi alesi vovototoa loloe la, zi nenemae wònɔa bɔbɔe be woawɔ kristalo).
6 . Dzoxɔxɔ si le bɔbɔe Compressive stress ƒe ɖiɖiɖeme (CSR) .
Woate ŋu azã CSR dodokpɔa atsɔ agblɔ nyagblɔɖiwo tso nusiwo wotsɔna tsia nu ƒe dɔwɔwɔ kple woƒe agbenɔƒe ŋu. Ne wotsɔ elastomeric-nuwɔnu aɖe na be wòatrɔ ɣesiaɣi la, wowɔa ŋusẽ si wotsɔ ƒo ƒui, eye ŋutete si le nusi wotsɔ wɔe ŋu be wòalé ŋusẽ sia me ɖe asi le nutome ƒe didime aɖe me dzidzea ŋutete si le esi be wòatre enu. Dzɔdzɔmeŋusẽ kple atikewo ƒe mɔnuwo siaa kpena ɖe nuteɖeamedzi ƒe ɖiɖiɖeme ŋu, le ɣeyiɣi kple dzoxɔxɔ nu, nu ɖeka axɔ aƒe ɖe eme, wokpɔa ŋutilã me ɖiɖiɖeme le dzoxɔxɔ si bɔbɔ me, le nuteɖeamedzi aɖe megbe teti, si hea kɔsɔkɔsɔ ƒe tɔtrɔ ɖe ɖoɖo nu kple tɔtrɔ le rababa-faller kple filler-filler ƒe anyigba dzi, eye nuteɖeamedzi ɖeɖeɖa ƒe ɖoɖoa trɔna. Le dzoxɔxɔ si kɔkɔ wu me la, atikewo ƒe wɔwɔmee ɖoa ɖiɖiɖeme ƒe agbɔsɔsɔme, ne dzɔdzɔmenuwo ƒe dɔwɔwɔwo le sue xoxo eye atikewo ƒe ɖiɖiɖeme nye nusi womate ŋu atrɔ o, si hea kɔsɔkɔsɔ ƒe gbagbã kple cross-linking reactions vɛ. Dzoxɔxɔ ƒe keke alo dzoxɔxɔ ƒe dzidziɖedzi kpata ate ŋu akpɔ ŋusẽ ɖe nuteɖeamedzi ƒe ɖiɖiɖeme dzi le elastomers me. Le CSR dodokpɔa me la, wodaa dodokpɔa ƒe kpɔɖeŋu .
Le CSR dodokpɔ me la, nuteɖeamedzi ƒe ɖiɖiɖeme dzina ɖe edzi ne wodo dodokpɔ ƒe kpɔɖeŋua ɖe dzoxɔxɔ si kɔ dzi. Ne nuteɖeamedzi ƒe ɖiɖiɖeme dzɔ le dodokpɔa ƒe gɔmedzedze la, gbɔɖeme bubu ƒe agbɔsɔsɔ dzina ɖe edzi gbã eye eƒe asixɔxɔ si sɔ gbɔ wu le tsatsam gbãtɔ me. Le tensile gã dodokpɔ piece be woawɔ gasket kpɔɖeŋuwo (19mm gota didime, ememe didime 15mm), kple elastic fixture woa ƒo ɖe kpɔɖeŋua ɖe woƒe xɔme ƒe dzoxɔxɔ ƒe titrime 25%, eye le 25 °C be woalé ɖe 25 l, 25 l -20 ~ 110 °C cycle of 24h, dodokpɔ ƒe ɣeyiɣi bliboa le dodokpɔ ƒe dzoxɔxɔ, dodokpɔ ƒe dzoxɔxɔ, ŋusẽ si yia edzi ƒe nyametsotso. Wowɔa ŋusẽdzidzenu ɣesiaɣi le dodokpɔɣia katã me le dodokpɔ ƒe dzoxɔxɔa me.
7. Ŋusẽ si Ethylene ƒe agbɔsɔsɔ kpɔna ɖe ame dzi .
7.1 Ethylene ƒe agbɔsɔsɔ kpɔa ŋusẽ gãtɔ ɖe EPDM polymers ƒe dzoxɔxɔ ƒe dɔwɔwɔ si bɔbɔ ƒe dɔwɔwɔ dzi. Woda polymer siwo ƒe ethylene ƒe agbɔsɔsɔme tso 48% va ɖo 72% kpɔ le nutrenu ƒe atike siwo le nyonyome nyuitɔ me. Wo katã ƒe taɖodzinue nye be yewoaɖe Mooney ƒe ʋeʋẽ ƒe tɔtrɔ dzi akpɔtɔ to EnB dodo ɖe polymer vovovo siawo me me.
EPDM rababa nye amorphous ne ethylene/propylene ratio sɔ eye monomers eveawo ƒe mama le polymer kɔsɔkɔsɔa me nye random. EPDM si me ethylene ƒe 48% kple 54% le la mewɔa kristalo le xɔme ƒe dzoxɔxɔ nu alo wu nenema o. Ne ethylene ƒe agbɔsɔsɔ ɖo 65% la, ethylene ƒe ɖoɖowo dzea dzidziɖedzi le xexlẽme kple didime me gɔme eye woateŋu awɔ kristalo, si wokpɔna le kristalo ƒe taƒoƒo siwo le DSC ƒe fli siwo ƒo xlã 40°C me. Zi alesi DSC la loloe la, zi nenemae kristalo siwo dzɔna la lolonae.
7.2 Tsɔ kpe ɖe ŋusẽ si ethylene ƒe agbɔsɔsɔ kpɔna ɖe dzoxɔxɔ si bɔbɔ ƒe nɔnɔmewo dzi ŋu la, kristalo ƒe lolome kpɔa ŋusẽ ɖe atike siwo me kristalo siwo me kristalo le ƒe tsakatsaka kple wo ŋudɔwɔwɔ bɔbɔe dzi. Zi alesi crystallite ƒe lolome loloe la, zi nenemae wòhiãna be dzoxɔxɔ kple lãɖeɖedɔa nasɔ gbɔ wu le tsakatsaka ƒe afɔɖeɖea me be woatsɔ polymer la atsaka kple akpa bubuawo bliboe. EPDM ƒe ƒuƒoƒo ƒe rababa ƒe ŋusẽ ƒuƒlu dzina ɖe edzi ne ethylene ƒe agbɔsɔsɔ le dzidzim ɖe edzi. Le nutrenu ƒe atikewo me afisi wodzidze ethylene ƒe agbɔsɔsɔ ƒe ŋusẽkpɔɖeamedzi le la, ethylene ƒe agbɔsɔsɔ si dzi ɖe edzi tso 50% va ɖo 68% na rababa ƒe ŋusẽ dzi ɖe edzi zi gbɔ zi ene ya teti. Xɔa me ƒe dzoxɔxɔ hã dzina ɖe edzi ne ethylene ƒe agbɔsɔsɔ le dzidzim ɖe edzi. shore a sesẽ si le amorphous polymer adhesive nye 63°, gake ƒuta a sesẽ si le polymer si me ethylene sɔ gbɔ wu nye 79°. Esia tso ethylene ƒe ɖoɖoa ƒe dzidziɖedzi, kristalo ƒe dzidziɖedzi le adhesive me, kple thermoplastic polymers ƒe dzidziɖedzi si sɔ kplii gbɔ.
7.3 Ne wodzidze sesẽme le dzoxɔxɔ si bɔbɔ me, si to vovo na polymers siwo me ethylene sɔ gbɔ ɖo la, amorphous polymers la ɖea tɔtrɔ sue aɖe fiana le sesẽme me, gake ethylene si lolo wu ƒe sesẽme ƒe tɔtrɔ meɖea fli ƒe nɔnɔme fiana o eye sesẽme si le eme la yia edzi le xɔme ƒe dzoxɔxɔ me, ale be polymer siwo le kɔkɔ wu la me.
7.4 Compression set la nɔ te ɖe dodokpɔ ƒe dzoxɔxɔ dzi le akpa gãtɔ me. Ne wodoe kpɔ le 175°C la, vovototo aɖeke mele nutete si woɖo ɖe polymerawo dometɔ aɖeke dome o (set la kpɔa ŋusẽ ɖe atike la ƒe wɔwɔme kple vulcanization system tiatia dzi). Le ethylene kristaloawo ƒe ƒoƒo vɔ megbe la, polymer la ɖea nɔnɔme si me nɔnɔme mele o fiana, eye be woate ŋu alé ŋku ɖe ethylene ƒe agbɔsɔsɔ ƒe ŋusẽkpɔɖeamedzi ŋu la, wowɔ dodokpɔwo le 23°C me. Edze ƒã be polymer siwo ƒe ethylene sɔ gbɔ wu la ƒe nɔnɔme trɔna ɖaa wu (si sɔ gbɔ wu zi gbɔ zi eve wu), eye ethylene ƒe ŋusẽkpɔɖeamedzia lolo wu gɔ̃ hã ne wodoe kpɔ le -20°C kple -40°C. Polymer siwo ƒe ethylene sɔ gbɔ wu 60% ƒe nɔnɔme trɔna ɖaa (>80%); Le -40°C me la, polymers siwo ƒe nɔnɔme meɖina o bliboe koe ƒe nɔnɔme trɔna ɖaa si nɔa anyi ɖaa (17%).
7.5 Ethylene ƒe ŋusẽkpɔɖeamedzi ɖe dzoxɔxɔ ƒe sesẽ si bɔbɔ tso Gehman dodokpɔwo me dzi. Ne wotsɔ dzoxɔxɔ na la, zi alesi dzogoea kɔe la, zi nenemae sesẽme ƒe dzidziɖedzi (alo modulus ƒe dzidziɖedzi) dzina ɖe edzii. Le dzoxɔxɔ si bɔbɔ me la, stiffness modulus dzina ɖe edzi ŋutɔ ne ethylene ƒe agbɔsɔsɔ le dzidzim ɖe edzi. Le amorphous polymers gome la, T2 nye -47°C, gake ethylene si sɔ gbɔ wu ƒe polymer ya ƒe T2 nye -16°C ko.
7.6TR Dzidzedze ƒe tsɔtsɔme ƒe ɖeɖekpɔkpɔ le lãmenugbagbeviwo ƒe ʋuʋu vɔ megbe, ethylene ƒe agbɔsɔsɔ kpɔa ŋusẽ ɖe dodokpɔmɔnu dzi ŋutɔ, si gaɖi Gehman dodokpɔa ake.
Esia sɔ kple Gehman dodokpɔa. Polymer vovovoawo ƒe ʋuʋu (%) toa vovo abe dzoxɔxɔ ƒe dɔwɔwɔ ene, eye amorphous polymers ye xɔa shrinkage si sɔ gbɔ wu le dzoxɔxɔ si bɔbɔ me; Gake abe alesi wogblɔe ɖi ene la, eƒe hayahaya gblẽna ne ethylene ƒe agbɔsɔsɔ dzina ɖe edzi le dzoxɔxɔ aɖe me.
Gbugbɔgadzɔ gblẽna ɖe edzi. TR10 ƒe asixɔxɔ to vovo tso -53°C na amorphous polymers va ɖo -28°C na polymers siwo ƒe ethylene sɔ gbɔ.
7.7 Nutete ƒe nuteɖeamedzi ƒe ɖiɖiɖeme (CSR) ƒe tsatsam .
Si yina gagbɔna. Mimi atikeawo, na woaɖe dzi ɖi le dzoxɔxɔ 25°C me hena gaƒoƒo 24, eye emegbe woatsɔ wo ade dzoxɔxɔ ƒe tsatsam si tso -20°C va ɖo 110°C hena gaƒoƒo 24. Ne woƒoe zi gbãtɔ, le dadasɔ ƒe ɣeyiɣia megbe la, crystalline polymer E ƒe nuteɖeamedzi buna wu amorphous polymer, eye ne eɖiɖi ɖe anyi va ɖo -20°C la, nutrenu ƒe ŋusẽ si le polymer eveawo me dzi ɖena kpɔtɔna, esime amorphous polymer A ƒe nuteɖeamedzi ƒe nuléle ɖe asi sɔ gbɔ (F/F0 si kɔkɔ wu). Dzoxɔxɔ na atike la va ɖo 110°C gbugbɔ eƒe nutrenuŋusẽ ɖo anyi, eye ne wogbugbɔe yi anyime va ɖo -20°C la, crystalline polymer la ƒe nutrenuŋusẽ si susɔ la mede 20% le eƒe asixɔxɔ me o, si wobuna zi geɖe be ebɔbɔ akpa na dɔwɔwɔ akpa gãtɔ, eye amorphous polymer la gade eƒe nutrenu si wu 50%. Tsitretsitsi si kplɔe ɖo na woƒo nya ta nenema ke. Edze ƒã be amorphous polymers nyo wu na nutrenu zazã le afisiwo dzoxɔxɔ ƒe dɔwɔwɔ kɔkɔ kple sue le.
8. Ŋusẽ si Diolefin ƒe nyawo kpɔna ɖe ame dzi .
Be woana teƒe si me mekɔ o si hiã na vulcanization la, wotsɔa diolefins siwo me womeƒoa nu le o abe ENB ene, HX kple DCPD kpena ɖe ethylene propylene polymers ŋu. Kadodo eve ɖeka wɔa dɔ le polymer matrix la me, gake evelia wɔa dɔ abe kpeɖeŋutɔ na polymer si wowɔ molecule ƒe kɔsɔkɔsɔ ene eye wònaa vulcanization point na sulfur yellow vulcanization. Woda ENB ƒe ŋusẽkpɔɖeamedzi kpɔ le yaƒoƒo ƒe ahuhɔ̃e (tsidzadza) bar ƒe nɔnɔmetatawo me. Wotsɔ polymers siwo me 2%, 6% kple 8% ENB le sɔ kple wo nɔewo.ENB ƒe tsɔtsɔ kpe ɖe eŋu kpɔ ŋusẽ ɖe vulcanization ƒe nɔnɔmewo kple crosslink density dzi vevie. Modulus dzi ɖe edzi esime didime dzi ɖe kpɔtɔ ŋutɔ. Sesẽa dzi ɖe edzi eye nutete ƒe ƒuƒoƒoa nyo ɖe edzi le dzoxɔxɔ ƒe dziyiyi me. Ne Enb ƒe nyawo le dzidzim ɖe edzi la, ɣeyiɣi si woatsɔ awɔ dzoe la va nɔa kpuie wu.
ENB nye nusi me nɔnɔme mele o, eye ne wotsɔe kpe ɖe polymer ƒe megbeƒu ŋu la, egblẽa nu le ethylene ƒe akpa si le polymer la me ƒe kristalowɔwɔ ŋu, ale be woate ŋu akpɔ polymer siwo ƒe ethylene sɔ kple wo nɔewo, eye ENB ƒe agbɔsɔsɔ si sɔ gbɔ la nana dzoxɔxɔ si bɔbɔ ɖe anyi ƒe nɔnɔmewo nyona ɖe edzi. Le xɔme ƒe dzoxɔxɔ me la, Enb ƒe agbɔsɔsɔ si sɔ gbɔ wu la nana nutete ƒe ɖoɖoa nyona ɖe edzi vie le crosslink ƒe kpekpeme si nyo wu ta. Ke hã, le dzoxɔxɔ si bɔbɔ me la, nutete ƒe hatsotso si nye polymer siwo ƒe Enb sɔ gbɔ la nyo ŋutɔ wu polymer siwo ƒe 2% EnB ƒe agbɔsɔsɔme le. Dɔ si ENB ƒe agbɔsɔsɔ wɔna ɖe brittleness dzoxɔxɔ, dzoxɔxɔ ƒe megbedede, kple Gehman ƒe dodokpɔ meɖe vovototo gã aɖeke fia le brittleness dzoxɔxɔ me le polymers le bliboe, kple na Gehman ƒe dodokpɔ kple TR dodokpɔ, polymer ɖesiaɖe ɖe ŋgɔyiyi le dzoxɔxɔ sue ƒe nɔnɔmewo me kple ENB ƒe agbɔsɔsɔ si le dzidzim ɖe edzi.
9. Ŋusẽ si Mooney Viscosity kpɔna ɖe dzoxɔxɔ si bɔbɔ ƒe nɔnɔmewo dzi .
Wonya nyuie be Mooney Viscosity (Molecular Mass) kpɔa ŋusẽ ɖe elastomers ƒe dɔwɔwɔ ƒe nɔnɔme dzi vevie. Le extrusion kple molding zazã le extrusion kple molding dɔwɔwɔwo me la, ele vevie be woatia nusi me mooney viscosity ƒe asixɔxɔ si sɔ le. Wozã atike ma ke si wozã tsɔ ku nu me le ŋusẽ si monomer etɔ̃lia, ENB, kpɔna ɖe dzoxɔxɔ si bɔbɔ ƒe nɔnɔmewo dzi tsɔ lé ŋku ɖe Mooney ƒe ʋeʋẽ ŋu la, wotsɔ polymer siwo ƒe mooney ƒe ʋeʋẽ lilili nye 30, 60, kple 80 sɔ kple wo nɔewo, eye wotsɔ polymery ƒe akpa siwo le Mooney ƒe lãkusi me la dzi ɖe edzi. Tensile strength, modulus, kple rababa ƒe ŋusẽ ƒuƒu dzi ɖe edzi esi Mooney Viscosity le dzidzim ɖe edzi. Dɔ si Mooney ƒe ʋeʋẽ wɔna ɖe EPDM ƒe dzoxɔxɔ ƒe nɔnɔme siwo bɔbɔ ɖe anyi dzi la meɖe dzesi o. Ke hã, nutete si nɔa anyi ɖaa le xɔme ƒe dzoxɔxɔ nu, -20°C kple -40°C dzina ɖe edzi ne molecule ƒe lolome le dzidzim ɖe edzi. Ke hã, nutete si woɖo ɖe xɔme ƒe dzoxɔxɔ dzi, -20°C kple -40°C metrɔ boo o kple molecule ƒe lolome si le dzidzim ɖe edzi, gake nutete si woɖo ɖe dzoxɔxɔ si kɔ (175°C) ya ɖe tɔtrɔ aɖewo fia le EPDM adhesives ƒe mooney ƒe ʋeʋẽ si kɔ wu ŋu.
10. Nyataƒoƒo .
Ethylene kple diolefin ƒe agbɔsɔsɔ kpɔa ŋusẽ ɖe EPDM elastomers ƒe dɔwɔwɔ dzi vevie le dzoxɔxɔ si bɔbɔ me, kple polymers siwo ƒe ethylene mesɔ gbɔ o la wɔa dɔ nyuie eye polymers siwo me diolefin sɔ gbɔ ɖo la nyona ɖe edzi le ethylene ƒe akpa si nye ethylene ƒe akpa si le polymer la me ƒe kristalowɔwɔ ta. Ele be woazã ethylene ƒe agbɔsɔsɔ si bɔbɔ ɖe anyi ƒe polymers ne dzoxɔxɔ ƒe dɔwɔwɔ si bɔbɔ nye seɖoƒe.
