Puas yog PET thiab PE tib yam?
PET polyethylene terephthalate.
PE yog polyethylene.
PE: polyethylene
Nws yog ib qho ntawm cov khoom siv polymer feem ntau siv hauv lub neej niaj hnub, thiab yog siv dav hauv kev tsim cov hnab yas, yas zaj duab xis, thiab cov thoob mis nyuj.
Polyethylene yog resistant rau ntau yam organic solvents thiab corrosion ntawm ntau yam acids thiab bases, tab sis tsis rau oxidative acids xws li nitric acid.Polyethylene yuav oxidize nyob rau hauv ib puag ncig oxidizing.
Polyethylene tuaj yeem suav tias yog pob tshab hauv lub xeev zaj duab xis, tab sis thaum nws muaj nyob rau hauv ntau, nws yuav opaque vim muaj zog lub teeb tawg vim muaj ntau cov muaju hauv nws.Lub degree ntawm polyethylene crystallization yog cuam tshuam los ntawm tus naj npawb ntawm cov ceg, thiab cov ceg ntau dua, nws nyuaj rau crystallize.Lub crystal melting kub ntawm polyethylene kuj tseem cuam tshuam los ntawm cov ceg ntoo, xws li ntawm 90 degrees Celsius mus rau 130 degrees Celsius.Cov ceg ntau dua, qhov kub ntawm melting qis dua.Polyethylene ib leeg muaju feem ntau tuaj yeem npaj tau los ntawm kev sib cais HDPE hauv xylene ntawm qhov kub siab tshaj 130 degrees Celsius.
PET: polyethylene terephthalate
Ib tug polymer ntawm terephthalic acid thiab ethylene glycol.Cov lus Askiv luv luv yog PET, uas yog siv los tsim cov polyethylene terephthalate fiber ntau.Suav lag luam npe yog polyester.Hom fiber ntau no muaj lub zog siab thiab hnav zoo ntawm nws cov ntaub.Tam sim no nws yog qhov tsim tau ntau yam ntawm cov hluavtaws fibers.Xyoo 1980, lub ntiaj teb cov khoom tsim tawm yog kwv yees li 5.1 lab tons, suav txog 49% ntawm lub ntiaj teb tag nrho cov khoom siv hluavtaws fiber ntau.
Qhov siab ntawm symmetry ntawm cov qauv molecular thiab rigidity ntawm p-phenylene saw ua rau cov polymer muaj cov yam ntxwv ntawm siab crystallinity, siab melting kub thiab insoluble nyob rau hauv cov organic solvents.melting kub yog 257-265 ° C;Nws qhov ceev nce nrog Lub degree ntawm crystallinity nce, qhov ceev ntawm lub xeev amorphous yog 1.33 g / cm^3, thiab qhov ceev ntawm fiber ntau yog 1.38-1.41 g / cm^3 vim yog crystallinity ntxiv tom qab ncab.Los ntawm kev tshawb fawb X-ray, nws tau suav tias qhov ua tiav Qhov ntom ntawm cov muaju yog 1.463 g / cm3.Lub iav hloov pauv kub ntawm amorphous polymer yog 67 ° C;Crystalline polymer yog 81 ° C.Lub tshav kub ntawm fusion ntawm cov polymer yog 113-122 J / g, lub peev xwm kub yog 1.1-1.4 J / g.Kelvin, qhov dielectric tas li yog 3.0-3.8, thiab qhov tshwj xeeb kuj yog 10^11 10^14 ohm.cm.PET yog insoluble nyob rau hauv ntau cov kuab tshuaj, tsuas yog soluble nyob rau hauv ib co corrosive organic kuab tshuaj xws li tov kuab tshuaj phenol, o-chlorophenol, m-cresol, thiab trifluoroacetic acid.PET fibers ruaj khov rau cov acids tsis muaj zog thiab cov hauv paus.
Daim ntawv thov Nws yog siv los ua raw khoom rau hluavtaws fibers.Cov fibers luv luv tuaj yeem sib xyaw nrog paj rwb, ntaub plaub, thiab hemp los ua cov khaub ncaws textiles los yog cov ntaub kho kom zoo nkauj sab hauv;filaments yuav siv tau los ua khaub ncaws yarns los yog industrial yarns, xws li lim ntaub, log cords, parachutes, conveyor siv, siv kev ruaj ntseg thiab lwm yam. Cov zaj duab xis yuav siv tau raws li lub hauv paus rau photosensitive zaj duab xis thiab suab daim kab xev.Txhaj molded qhov chaw tuaj yeem siv los ua cov thawv ntim khoom.
Peb lub tshuab ntim khoom tuaj yeem sau PE thiab PET lub raj mis
Post lub sij hawm: Feb-25-2022