Neoprene (cr) yog lub polymerization ntawm ch2 = CCL -ch = ch2 (2-chloro-1, 3-butadiene) los yog lawv cov copolymers nrog lwm monomers.Qhov tseem ceeb raw li cov chloroprene yog acetylene.Various hom polychloroprene yuav tsum npaj los ntawm emulsion polymerization.The txheej txheem ntawm polymerization yuav raug kho kom tsim cov khoom tsis muaj crosslinked thiab non-branched polymers (sib -polymers) .Ntawm ntau ntau hom neoprene tau muab faib ua ob pawg raws li nws cov qauv thiab yam ntxwv:
1. Thawj hom yog cov leej faj dawb polymer nyob rau hauv cov composition, thiab tus tseem ceeb regulator siv nyob rau hauv synthesis yog mercaptan;
2. Qhov thib ob hom yog chloroprene roj hmab uas muaj cov phlu tuaj rau hauv cov yeeb yaj duab molecular, uas tshwm sim nyob rau hauv daim ntawv ntawm ib tus choj polysulfur.Lub tuav cov khoom siv nyob rau hauv txoj kev tsim muaj leej faj los sis leej faj nrog mercaptan.Qhov nruab nrab molecular luj ntawm neoprene yog 100, 200, 000. Txawm tias cov polychloroprene muaj qib siab ntawm kev sib daj sib deev, nws tseem muaj tshuaj muaj zog thiab tiv thaiv rau ntau hom kev laus.Qhov no yog vim hais tias cov electronegative chlorine atoms ntawm cov pa roj carbon dioxide ntawm ob lub paj nyiaj nyiam PI electron txheej, txo cov electron qhov sib npaug ntawm cov nyiaj txais ob thiab yog li cov reactivity ntawm cov nyiaj txais ob. Lub tshuaj chlorine nws tus kheej nws cov kev ua si thiab reactivity.
Ceev: 1200 ~ 1240kg / m3.Glass hloov qhov kub thiab txias: - 40 ℃ .Crystalline theem kub: 40 ~ 65 ℃.
Muaj cov tshuaj chlorine nyob rau hauv polychloroprene ua rau nws tsis muaj peev xwm, thaum lub polarity ntawm lub polymer ua rau nws resistant rau fatty hydrocarbon o thiab co nplaum rau co.
Thaum pib ntawm qhov tsim muaj, nws tau tsim rau cov roj hmab uas tsis muaj roj rau cov roj uas hloov cov roj hmab. Yog li ntawd, neoprene tseem siv dav hnub no. Nyob rau hauv txhua rooj plaub, lub cev ua ke ntawm neoprene tau siv rau ntau tshaj li ib txhiab hom kev siv nyob rau hauv tag nrho kev lag luam, ntawm cov uas nws yog dav paub.
Cov khoom ntawm cr yog nyob ntawm seb cov microstructure ntawm lub polymer, nws cov khoom ua nyob ntawm seb qhov nyhav thiab qhov faib ntawm cov polymer, tus naj npawb thiab kev faib cov branched chains thiab crosslinks, thiab nws cov khoom siv tshuaj nyob ntawm cov tshuaj chlorine nyob rau theem ntug ntawm carbon atoms.The yooj yim ntau yam ntawm cr yog homopolymer ntawm chloroprene.Nws muaj kev molecular tshiab thiab crystallization ntsuam ntawm chav tsev kub, thiab nws cov crystallinity decreases nrog cov laus ntawm polymer.Tus siv cov cr adhesive vim nws yog ntawm 20 ℃ qab polymerization, nws cov crystallinity siab.
Tseem ceeb kev ua tau zoo
Kev txwv tsis pub tshaj, kub kub - neoprene muaj peev xwm, daim ntaub ntawv nrawm ntawm 80 ~ 95 ℃, nws pom qhov zoo ntawm tus cwj pwm thiab daim ntawv thov ntawm cov pa, tshwj xeeb formula tau txog 120 ℃, tshaj qhov txwv tsis ua rau neoprene soften los yog yaj, tab sis yuav ua rau kom los yog poob ntawm elasticity.Cold - - 20 ℃ mus rau 25 ℃ qis hauv daim ntawv thov, kev hloov tsuas yog hloov me me, hauv qab no kub, qhov kub thiab txias, 40 ℃ (-) ua ntej nws zom , cov mis tshwj xeeb tau cog lus tseg rau daim ntawv thov qis tshaj ntawm 55 ℃ qab xoom.
Zoo kawg nkaus tsis kam mus siv quav ciab, roj, roj, lubricants thiab ntau yam roj av khoom.
Zoo tsis kam mus rau alkali, dilute mineral pob zeb thiab inorganic ntsev daws.
Kev tsim nyog tsim nrog kev ua zoo thiab kev ua huab cua.
Nws muaj peev xwm ua tau yog nyob hauv dej los yog faus hauv av rau ib qho ntev.
Yav zoo siab tsis kam mus rau dabtsi, twisting thiab compression.
Tseem ceeb siv
Cov khoom siv neoprene muaj xws li: hlau thiab cable txheej, muaj roj paug, siv tawv roj hmab, siv tawv, ntaub, siv los tsim kev sib txawv, cov khoom ua qoob, cov khoom ua kua, , cov khoom siv siab / molding, ntau hom khau, ntawv, ntim, siv thiab lwm cov khoom siv.