Koj Puas Paub Txhua Yam Txog CPE

yam ntxwv
Vim tias CPE molecules tsis muaj ob txoj hlua, lawv muaj huab cua zoo, nplaim taws ua haujlwm, zoo thermal stability dua li PVC, tus nqi qis thiab kev ua haujlwm zoo heev. Soluble nyob rau hauv aromatic hydrocarbons thiab halogenated hydrocarbons, insoluble nyob rau hauv fatty hydrocarbons, saum toj no 170 degree decomposition, tso hydrogen chloride gas, nws muaj ib tug ruaj khov qauv, zoo heev aging kuj, nplaim kuj, txias kuj, huab cua tsis kam, dawb colorability, tshuaj tiv thaiv, ozone. tsis kam thiab hluav taws xob rwb thaiv tsev thiab kev sib raug zoo thiab kev ua haujlwm, tuaj yeem sib xyaw nrog PVC, PE, PS thiab roj hmab los txhim kho nws lub cev.
Peb yam tseem ceeb uas cuam tshuam rau CPE kev ua tau zoo
Ua ntej: PE hom- - - - -PE CPE muaj viscosity siab thiab tensile lub zog, tab sis qhov adhesion ntawm CPE thiab PVC resin yog tsawg, lub viscosity thiab tensile lub zog ntawm CPE tau nrog tsawg molecular hnyav polyethylene yog tsawg, thiab cov CPE tau nrog high density polyethylene muaj cua sov zoo.
Thib ob: qhov loj ntawm cov khoom siv raw khoom particle{{{0}}} particle loj me me dhau los ua cov kua nplaum khov lossis CPE loj, thaum cov khoom loj dhau lawm, kev faib cov tshuaj chlorine tsis sib xws, nyuaj rau yaj. nyob rau hauv cov kuab tshuaj organic, qhov particle loj ntawm 0.1-200 μ m.
Thib peb: thaum cov tshuaj chloride degree ntawm CPE- - - - -chloride cov ntsiab lus tsawg dua 25 feem pua, nws tsis sib haum nrog PVC thiab tsis tuaj yeem siv los ua tus neeg sawv cev hloov kho; Thaum cov ntsiab lus chlorine ntau dua 40 feem pua, nws yog sib xws nrog PVC, nws tuaj yeem siv los ua cov yas yas thiab tsis haum rau kev hloov pauv; CPE nrog cov ntsiab lus chlorine ntawm 36-38 feem pua ​​muaj qhov elasticity zoo thiab sib haum nrog PVC, yog li nws tau dav siv los ua PVC cuam tshuam kev hloov pauv.Cov feem ntau siv CPE muaj 35 feem pua ​​​​chlorine, CPE nrog cov ntsiab lus chlorine ntawm li 35 feem pua ​​muaj cov crystallinity tsawg. thiab vitrification kub, nrog zoo roj hmab elasticity, thiab haum compatibility nrog PVC, thiab yog dav siv los ua ib qho kev hloov pauv ntawm PVC cov khoom nyuaj.
Kev xaiv ntawm CPE kuj
  1. Domestic CPE models are generally identified as 135A, 135B, 140B, 239C, etc. The first digits 1 and 2 indicate the size of residual crystallinity (TAC value), 1 represents TAC value at 0-10%, 2 is TAC value>10 feem pua, tus lej thib ob thiab tus lej thib peb qhia cov ntsiab lus chlorine, xws li 35 yog 35 feem pua ​​​​chlorine cov ntsiab lus, qhov kawg yog tsab ntawv ABC, siv los qhia qhov hnyav molecular ntawm raw khoom PE, A yog qhov siab tshaj plaws thiab C yog qhov tsawg kawg nkaus.
2. Kev cuam tshuam ntawm qhov hnyav molecular: Hom A cov khoom ntawm CPE muaj qhov hnyav tshaj plaws molecular thiab loj melting viscosity, thiab nws cov viscosity yog qhov zoo tshaj plaws match nrog PVC, nrog rau qhov zoo tshaj plaws dispersion nyhuv nyob rau hauv PVC, uas muaj peev xwm tsim ib tug zoo tagnrho network dispersion daim ntawv. Yog li, cov khoom siv A-hom ntawm CPE feem ntau yog xaiv los ua tus neeg sawv cev hloov kho ntawm PVC.
3. TAC tus nqi: TAC tus nqi qhia txog cov ntsiab lus ntawm PE crystallization thiab undetermined morphology nyob rau hauv CPE molecules, uas qhia txog cov uniform faib ntawm chlorine atoms ntawm CPE molecules. Qhov loj TAC tus nqi qhia txog crystallization ntawm PE saw ntu, thaum PE saw ntu muaj kev sib raug zoo nrog PVC, thiab tus nqi TAC me me ua rau kev sib raug zoo ntawm PE thiab PVC. Feem ntau, CPE nrog TAC tus nqi tsawg dua 5 yog xaiv los ntawm kev cuam tshuam.
Cov nyhuv ntawm CPE ntxiv rau PVC
Thaum tus nqi sib ntxiv yog qis dua 10, lub zog impulse ntawm PVC nce sai nrog qhov sib ntxiv ntawm CPE, tab sis ntxiv cov nyiaj ntawm CPE tsis tshua muaj zog ua rau lub zog ntawm PVC.Yog li ntawd, raws li kev cuam tshuam tsis kam, qhov sib ntxiv ntawm CPE yog qhov tsim nyog. rau 8-10 luam. Lub caij no, nrog rau qhov nce ntawm CPE, lub zog tensile ntawm PVC sib xyaw tseem txo qis, thiab qhov elongation ntawm pob txha nce. Yog hais tias lub toughness yog qhia los ntawm cov khoom ntawm tensile lub zog thiab puas elongation, nws yog pom tseeb hais tias PVC toughness yuav nce nrog qhov nce ntawm CPE ntxiv.
Cov ntaub ntawv uas nyob rau hauv ntau tshaj 8 daim ntawv, CPE ntau tshaj saturated solubility nyob rau hauv PVC los ntawm PVC nag lossis daus, PVC rau lub hiav txwv, CPE rau cov kob microphase sib cais qauv, yog li zoo heev txhim kho qhov cuam tshuam lub zog ntawm PVC, kuj muaj cov khoom uas CPE muaj peev xwm tsim ib tug network. nyob rau hauv cov mis, yog li cuam tshuam kev hloov pauv, tab sis CPE hauv qhov qis ntxiv (xws li 1 daim ntawv), tsis yog nyob rau hauv cov qauv txheej txheem los tsim ib lub network, yuav tsis tshaj nws cov saturated solubility hauv PVC thiab nag lossis daus, nws cuam tshuam kev hloov pauv hauv cov qauv. .
Cov txiaj ntsig ntawm CPE rau PVC txheej txheem
Thaum tus naj npawb ntawm CPE ntxiv yog tsawg dua 5 daim ntawv, nws yog ncua plasticizing, thiab nws yeej tsis cuam tshuam rau plasticization ntawm cov qauv txheej txheem. Thaum CPE ntau tshaj 5 qhov chaw, nws ua lub luag haujlwm hauv kev txhawb nqa plasticizing. Nrog rau qhov nce ntawm CPE, lub sij hawm plasticizing ntawm cov mis yuav luv thiab luv, qhov siab tshaj plaws plasticizing torque thiab sib npaug torque nce, thiab plasticizing kub maj mam txo.
Cov ntsiab lus ntawm CPE yog 35 feem pua, muaj ob txoj hlua hauv nws cov qauv: ib qho yog cov saw hlau hydrogen hloov los ntawm cov tshuaj chlorine atoms, cov qauv no muaj zog, zoo ib yam li PVC, ob qho kev sib raug zoo yog qhov zoo, lwm qhov yog hydrogen atoms tsis hloov los ntawm chlorine atoms PE saw, seem ntawm cov qauv polarity yog qhov tsis muaj zog, tsis zoo sib xws nrog PVC, lub lubrication sab nraud ntawm PVC, tuaj yeem ncua cov yas ntawm PVC.
Lub vitrification kub ntawm CPE yog nyob ib ncig ntawm 10 degree, whereas ib tug PVC ntawm 80 degree, nyob rau hauv lub xeem tej yam kev mob, CPE pom ib tug qauv rau mos yas ua ntej PVC thiab ib tug me ntsis viscosity siab dua, Thaum ib tug me ntsis ntawm CPE yog ntxiv, me me tag nrho cov nyiaj. ntawm cov kab nruab nrab ntawm cov saw txuas nrog kev sib raug zoo ntawm CPE thiab PVC, Qhov tseem ceeb ntawm sab nraud lubrication ntawm PE saw ntu, Plasticity ntawm lub kaw lus qeeb, Nrog rau qhov nce hauv CPE, Cov yas muag thaum ntxov thiab siab dua viscosity ntawm loj CPE molecules nce lub viscosity ntawm tag nrho cov formulation system, lub sij hawm no, lub cawv ntawm CPE nyob rau hauv lub viscosity ntawm tag nrho cov khoom overcomes lub sab nraud lubrication ntawm PE saw ntu nyob rau hauv nws cov qauv, Rau tag nrho cov formulation system pib plasticizing nyob rau hauv ntau qis kub, los txhawb lub plasticization ntawm cov khoom.