Qhov sib txawv tseem ceeb ntawm PA6 thiab PA66 yog tias PA6 yog muab los ntawm diamine, whereas PA66 yog muab los ntawm diamine thiab diacid.
Muaj ntau hom polyamides muaj ntau yam khoom, nyob ntawm lawv daim ntawv thov. Peb tuaj yeem pom cov polyamides ua PA. Nylon yog ib hom polyamide. Muaj ntau hom nylon, xws li nylon 6 thiab nylon 66, txhais los ntawm PA6 thiab PA66.
Nylon yog dab tsi?
Feem ntau, qhov tshwj xeeb tshaj plaws ntawm nylon fibers yog lawv lub zog thiab lub teeb yuag. Tsis tas li ntawd, cov khoom siv no muaj kev tiv thaiv siab heev, tsis zoo li ntau lwm cov hluavtaws fibers. Nylon yog elastic heev thiab thib ob tsuas yog spandex xov paj thiab roj hmab. Cov khoom no yog resilient, uas ua rau nws resistant rau wrinkles. Cov luster ntawm nylon muab qhov zoo ib yam li paj rwb thiab ntaub plaub. Cov ntaub nylon nruj nreem yuav hnov lub teeb, tab sis nws ntxiab ya raws, huab cua, thiab cua sov. Yog li ntawd, nws yog qhov zoo tshaj plaws los ua cov ntaub ntawm cov kaus thiab cov kaus mom raincoats. Kab thiab mildew tsis cuam tshuam rau nylon.
Txawm li cas los xij, muaj qee qhov tsis zoo ntawm kev siv nylon; e.g. raug tshav ntuj tuaj yeem txo cov khoom ntawm nylon, qhov nyiam ntawm lint thiab av thiab zoo li qub buildup. Cov ntaub ntawv tseem ceeb ntawm nylon suav nrog cov neeg siv khoom siv hluav taws xob, kev lag luam tsheb, ntim khoom thiab lwm yam. Muaj ob hom nylons: lub monaidic (-[RNHCO] n -), thiab dyadic (-[NHRNHCOR'COn]-). Hom nylon feem ntau yog luv li 'nylon x' lossis 'nylon xy', qhov twg x thiab y sawv cev rau cov pa roj carbon atoms hauv cov monomer uas lawv tau tsim. Peb tuaj yeem txheeb xyuas cov hom no li PA6 thiab PA66, feem.
PA6 yog dab tsi?
PA6 yog ib qho tseem ceeb tshaj plaws monadic nylons, feem ntau yog siv los ua fiber ntau ua polymer thiab ua cov yas engineering. Peb tuaj yeem ua ke PA6 los ntawm yaj polymerization ntawm Ɛ-aminocaproic acid lossis Ɛ- caprolactam. Cov khoom no absorbs ya raws mus rau ib qho twg, thiab Tg (iav hloov pauv kub) ntawm PA6 txo nrog rau kev nce noo noo.
Zig-zag molecular conformation thiab anti-parallel npaj ntawm PA6 chains ua rau ntau hydrogen bonds ntawm amide pawg. Lub tensile zog ntawm cov khoom no kuj txo nrog nce noo noo cov ntsiab lus. Lub tenacity ntawm fibers tuaj yeem txhim kho los ntawm yaj spun thiab kub daim duab ntawm fibers. Thaum piv rau PA66, PA6 muaj lub zog muaj zog. Cam khwb cia PA6 muaj txiaj ntsig zoo hauv kev tsim cov khawm khawm thiab cov kabmob, cov roj tso tsheb hlau luam, lub tsev kaw, thiab ntau qhov chaw ntawm cov ntawv tsim cov tshuab thiab cov khoom siv. Fiberglass reinforced PA6 resins yog qhov tseem ceeb hauv kev tsim cov tsheb radiator shrouds, cua ducts, cov khoom siv, roj hlwb, thiab reservoirs.
PA66 yog dab tsi?
PA66 yog dyadic nylon peb tuaj yeem tsim los ntawm qhov kub-kub yaj polymerization ntawm adipic acid thiab hexamethylenediamine. Cov khoom siv no yog ib qho tseem ceeb tshaj plaws thiab muaj txiaj ntsig zoo nylons hauv ntiaj teb, vim nws qhov sib npaug zoo ntawm cov khoom thiab tus nqi qis. Lub melting point ntawm PA66 yog nyob ib ncig ntawm 260-265 ° C, thiab Tg yog txog 50 ° C thaum qhuav.
Zoo ib yam li PA6, cov khoom siv no muaj zig-zag saw conformation, uas ua rau cov intramolecular hydrogen bonds. Cov iav-fiber puv PA66 muaj qhov tshwj xeeb nruj thiab tawv, uas ua rau nws muaj txiaj ntsig zoo hauv kev siv xws li molded industrial xyaum thiab cov khoom siv hauv tsev. Lub zog tensile ntawm PA66 yog ntau dua li ntawm nylon 6. Cov kev siv ntawm molded PA66 muaj xws li lawnmower blades, tsheb laij teb hood extensions, tsheb kauj vab log, skate log, skis rau snowmobiles, bearings, hluav taws xob sib txuas, thiab maus taus crankcases. PA66 fibers yog qhov tseem ceeb hauv kev lag luam khaub ncaws, ntaub thiab ntaub pua plag.
Qhov txawv ntawm PA6 thiab PA66 yog dab tsi?
PA 6 thiab PA66 yog ob hom polyamides. Qhov sib txawv tseem ceeb ntawm PA6 thiab PA66 yog PA6 yog muab los ntawm diamine, whereas PA66 yog muab los ntawm diamine thiab diacid.
Cov lus qhia hauv qab no qhia txog qhov sib txawv ntawm PA6 thiab PA66 hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – PA6 vs PA66
PA6 thiab PA66 qhia txog nylon 6 thiab nylon 66, raws li. Qhov sib txawv tseem ceeb ntawm PA6 thiab PA66 yog PA6 yog muab los ntawm diamine, whereas PA66 yog muab los ntawm diamine thiab diacid.
