Acrylonitrile-butadiene-styrene copolymer (ABS) muaj cov khoom siv hluav taws xob zoo heev, tiv taus txias, tiv taus roj, tshuaj lom neeg ruaj khov, thiab cov khoom siv cuam tshuam, thiab tau siv dav hauv cov khoom siv hluav taws xob, khoom siv hauv tsev thiab kev thauj mus los.Txawm li cas los xij, cov pa oxygen ntawm ABS tsuas yog 18%, thiab nws tuaj yeem hlawv tom qab hluav taws, uas txwv nws cov khoom hauv ntau daim ntawv thov.Yuav kom ua tiav cov nplaim hluav taws kub nyhiab ntawm ABS rau UL94 V-0, cov nplaim hluav taws xob ntxiv yog feem ntau loj.Cov khoom siv hluav taws xob ntawm cov khoom raug txo, thiab tus nqi siab dua.
Acrylonitrile-butadiene-styrene copolymer (ABS) muaj cov khoom siv hluav taws xob zoo heev, tiv taus txias, tiv taus roj, tshuaj lom neeg ruaj khov, thiab cov khoom siv cuam tshuam, thiab tau siv dav hauv cov khoom siv hluav taws xob, khoom siv hauv tsev thiab kev thauj mus los.Txawm li cas los xij, cov pa oxygen ntawm ABS tsuas yog 18%, thiab nws tuaj yeem hlawv tom qab hluav taws, uas txwv nws cov khoom hauv ntau daim ntawv thov.Yuav kom ua tiav cov nplaim hluav taws kub nyhiab ntawm ABS rau UL94 V-0, cov nplaim hluav taws xob ntxiv yog feem ntau loj.Cov khoom siv hluav taws xob ntawm cov khoom raug txo, thiab tus nqi siab dua.
Polytetrafluoroethylene (PTFE) muaj cov txiaj ntsig zoo los tiv thaiv kev poob thiab tau siv dav hauv cov nplaim hluav taws xob PC / ABS thiab lwm yam ntaub ntawv, tab sis muaj qee cov ntaub ntawv tshawb fawb txog PTFE hauv nplaim hluav taws kub ABS.ABS nplaim retardant feem ntau nyob rau hauv kev lag luam, thaum qhia PTFE, tham txog cov nyhuv ntawm PTFE ntawm kev ua tau zoo ntawm nplaim taws retardant ABS.
1. Kev sim ib feem
1.1.Main raw khoom
ABS, brominated triazine, antimony trioxide, PTFE, antioxidants, lubricants, thiab lwm yam.
1.2.Cov cuab yeej tseem ceeb
Twin-ntsia hlau extruder: SHJ-35 hom;txhaj tshuaj molding tshuab: T80 hom;computer-tswj hluav taws xob universal kuaj tshuab: CM6104 hom;thermal deformation kub ntsuas ntsuas: 303;Thermogravimetric (TG) analyzer: 209C hom.Pendulum impact tester: Qauv ZBC-25B;Melt flow rate (MFR) ntsuas: MPXRZ-40A;Kab rov tav thiab ntsug combustion tester: Qauv HVR-2.
1.3.Kev npaj ua qauv
Qhuav ABS ntawm 80 ℃ rau 3 mus rau 5 teev, ces sib tov ABS, brominated triazine, antimony trioxide, PTFE, thiab lwm yam additives uniformly, yaj thiab muab los ntawm ib tug ntxaib-ntsia hlau extruder rau extrusion thiab granulation.Extrusion kub yog 215-225 ℃, ntsia hlau ceev yog 360 r / min;ces nws yog tshuab thiab qhuav ntawm 80 ℃ rau 2 teev, ces txhaj rau hauv tus qauv qauv, txhaj tshuaj kub yog 200 ~ 210 ℃.
1.4.Kev xeem ua haujlwm
combustion kev ua tau zoo: kuaj raws li UL94;tensile kev ua tau zoo: kuaj raws li GB / T 1040-1992;dabtsi yog khoov zog: kuaj raws li GB/T 9341-2000;cuam tshuam lub zog ntawm cantilever notch: kuaj raws li GB / T 1843-1996;MFR: raws li GB / T 3682-= = 2000 xeem, kub 220 ℃, load 220kg;kub distortion kub: kuaj raws li GB / T 16341-2004;TG tsom xam: cua kub tus nqi 10. C/min,.Qhov kub ntau yog 30 ~ 700 ℃, nyob rau hauv nitrogen cua.
2. Cov txiaj ntsig thiab kev sib tham
2.1.Cov qauv tsis muaj nplaim hluav taws kub hnyiab tag tom qab thawj qhov hluav taws kub, thiab cov nplaim hluav taws kub tsis zoo.Thaum muaj qee qhov nyiaj ntawm brominated triazine thiab antimony trioxide nplaim retardant ntxiv, cov nplaim hluav taws kub hnyiab tau zoo dua, thiab cov nplaim hluav taws kub hnyiab tau nce mus txog qib UL94V-2, tab sis lub sij hawm kub hnyiab tau ntev dua, thiab cov nplaim hluav taws kub hnyiab tseem tsis tau. zoo tagnrho.Qhov sib ntxiv ntawm PTFE ho shortens lub sij hawm hlawv ntawm cov khoom.Thaum 0.2% PTFE ntxiv, cov nplaim hluav taws kub ntawm cov khoom yog nce los ntawm V-2 mus rau V-0.Qhov no yog vim hais tias PTFE muaj lub siab melting point (323 ° C), thiab nws tsis yaj ntawm cov khoom siv kub, tab sis nws yog ib qho yooj yim rau fibrillate los tsim ib tug fiber ntau network nyob rau hauv lub blending shear quab yuam, uas txo cov nplaim taws.
2.2.Tom qab ntxiv cov nplaim hluav taws kub, qhov cuam tshuam lub zog ntawm cov khoom poob qis, thaum lwm yam khoom siv hloov pauv me ntsis.Nyob rau hauv sib piv, thaum nplaim retardants thiab PTFE ntxiv nyob rau tib lub sij hawm, lub toughness ntawm cov khoom yog ib tug me ntsis txhim khu kev qha piv nrog cov nplaim retardants ib leeg, thiab raws li tus nqi ntawm PTFE nce, lub notched cuam tshuam lub zog ntawm cov khoom kuj nce, uas tej zaum yuav yog lub fiber network qauv tsim los ntawm PTFE nyob rau hauv cov khoom plays lub luag hauj lwm ntxiv dag zog rau ib yam twg.
2.3.Raws li tus nqi ntawm PTFE nce, MFR ntawm cov khoom maj mam txo.Thaum tus nqi ntawm PTFE ntxiv yog 0.3%, MFR ntawm nplaim hluav taws kub ABS txo los ntawm 23.1g / 10min mus rau 14.5g / 10min, qhia txog cov nyhuv ntawm PTFE ntawm cov khoom ntws ntawm cov khoom.Qhov loj dua yog vim muaj cov khoom siv PTFE fiber ntau, uas cuam tshuam cov ndlwg ntawm ABS molecules.Vim yog cov qauv tshwj xeeb tsim los ntawm PTFE thaum lub sijhawm ua haujlwm, cov khoom siv strips zoo li o ntawm qhov tawm ntawm cov khoom siv strips, ua rau cov ntaub ntawv tuab dua thiab qeeb pelletizing.Extrusion ntawm cov ntaub ntawv tsis muaj PTFE yog qhov qub.
2.4.TG thiab DTG tsom xam cov ntaub ntawv
Muaj tsuas yog ib lub ncov ntawm thermal poob phaus nyob rau hauv cov txheej txheem ntawm thermal poob ntawm ntshiab ABS, thiab ob lub ncov ntawm thermal poob tshwm sim nyob rau hauv tus txheej txheem ntawm thermal poob ntawm nplaim retardant ABS.Thawj lub ncov yog tshwm sim los ntawm decomposition ntawm nplaim hluav taws, thiab lub ncov thib ob yog tshwm sim los ntawm decomposition ntawm ABS.Nrog rau qhov sib ntxiv ntawm PTFE, lub ncov thermal poob qhov kub (427 ° C) ntawm ABS yog 1.8 ° C siab dua li ntawm ABS ntshiab (428.8 ° C), tab sis lub ncov sib txawv thermal poob tus nqi (qhov kub poob ntau) ( 11.7% / min) tsuas yog Lub ncov sib txawv thermal poob qis ntawm cov ntshiab ABS (18.8% / min) yog 62.2%, uas yog 7.9% qis dua qhov sib txawv thermal poob qis (12.7% / min) ntawm cov qauv 28 yam tsis muaj PTFE ntxiv.Qhov sib ntxiv ntawm PTFE tuaj yeem txhim kho cov nplaim retardant kev ua tau zoo ntawm cov khoom.
Bromotriazine thiab antimony trioxide yog cov halogen-antimony nplaim retardants, uas tsis tsuas yog hloov cov roj theem nplaim retardant cov tshuaj tiv thaiv tab sis kuj hloov cov thermal degradation cov tshuaj tiv thaiv ntawm lub condensed theem.Cov pa roj carbon residual ntawm ntshiab ABS ntawm 700 ℃ yog 1.2%, thiab cov nplaim hluav taws kub ABS nrog brominated triazine thiab antimony trioxide ntxiv.Cov pa roj carbon seem ntawm 700 ℃ yog 3.5%.Qhov tsim ntawm cov pa roj carbon txheej kuj yuav pab kom muaj kev tiv thaiv ntawm cov khoom.Ignitability.Nyob rau tib lub sijhawm, cov pa roj carbon seem ntawm 700 ° C nrog PTFE ntxiv yog 3.6%, qhia tias PTFE ua tsis tiav los txhawb kev tsim cov pa roj carbon.Qhov sib ntxiv ntawm PTFE tuaj yeem txhawb nqa cov txheej txheem carbon denser thiab zoo dua rwb thaiv tsev thiab oxygen thaiv, yog li Siv nrog halogen-antimony nplaim retardant, nplaim retardant nyhuv yog zoo heev.
3. Cov lus xaus
3.1.Qhov sib ntxiv ntawm PTFE tuaj yeem txo qhov siab tshaj qhov hnyav poob ntawm cov nplaim hluav taws kub ABS, txo cov sijhawm kub ntawm cov khoom, thiab txhim kho cov nplaim hluav taws kub ntawm cov khoom.
3.2.Qhov sib ntxiv ntawm PTFE tsis tshua muaj txiaj ntsig rau cov khoom siv hluav taws xob ntawm cov nplaim hluav taws kub ABS, thiab rau qee qhov kev txhim kho lub zog ntawm cov khoom.
3.3.PTFE muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm cov khoom siv hluav taws xob hluav taws xob ABS, thiab qhov ntau npaum li cas yuav tsum tau hloov kho raws li qhov xav tau thaum siv.
Post lub sij hawm: Jun-11-2020