2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-15 04:12
Polystyrene tau pom dav siv hauv ntau thaj tsam ntawm peb lub sijhawm. Nws yog ib puag ncig zoo heev, muaj cov thermoplasticity, tsis kim, muaj ntau yam xim thiab duab. Tam sim no, cov khoom siv no tsis muaj qhov sib piv uas tuaj yeem hloov nws hauv ntau qhov kev hwm.
Nta thiab lub hom phiaj
Polystyrene yog cov ntaub ntawv uas tau txais los ntawm polymerizing vinyl benzene (styrene), uas yog cov pa roj carbon tseem ceeb uas feem ntau tsim cov polymers. Cov ntawv Polystyrene muaj cov qauv kab, nws yooj yim rau txheej txheem, tab sis nws lub ntsiab tseem ceeb yog nws cov thermoplasticity siab . Qhov no tso cai rau peb tsim cov khoom lag luam nrog ntau yam duab, txhua hom thiab hom. Cov thev naus laus zis ntawm kev tsim cov yas yog yooj yim heev, thiab hais txog nws cov khoom nws yog cov khoom siv ruaj khov thiab siv tau, ua rau muaj cov yam ntxwv tiv taus poob siab. Nws ua tiav hloov iav vim nws qhov pom kev.
Cov xim palette ntawm cov khoom yog ntau yam, uas ua rau nws muaj peev xwm siv nws hauv kev tsim sab hauv . Ib qho ntxiv, ntau hom yas uas siv tau los ua kom tau cov khoom siv hauv tsev, tshuaj, thiab kev tsim kho. Nws yog siv hauv kev ua tub rog thiab khoom noj khoom haus. Ntau yam nyob ib puag ncig peb tau ua los ntawm polystyrene, suav nrog txhua yam khoom siv thev naus laus zis, yam uas nws nyuaj rau xav txog lub neej niaj hnub no.
Hom thiab yam ntxwv
Raws li nws cov yam ntxwv thiab txheej txheem tsim khoom, cov polymer tuaj yeem yog hom sib txawv
- Polystyrene ntawv GPPS (lub hom phiaj dav dav).
- Cov khoom nruab nrab VIPS.
- Ntawv yas ua npuas ncauj, cim nrog EPS thiab EPS.
- Cov khoom lag luam tso tawm los ntawm kev siv tshuab extruder (EPS, XPS).
- High Impact Resistant Polystyrene (HIPS).
Cov neeg nyiam tshaj plaws yog cov khoom siv dav dav lub hom phiaj, uas muaj qib siab ntawm kev tiv thaiv kom deformation thiab cov npoo zoo ntawm kev nyab xeeb, uas yog vim cov ntsiab lus ntawm cov roj hmab hauv nws cov muaj pes tsawg leeg.
Nws cov khoom siv:
- tsis muaj xim;
- qis nqus dej noo;
- siab dielectric tsis tu ncua;
- hluav taws xob tsis kam;
- tawv thiab tawv;
- tsis muaj zog;
- raug rau ultraviolet hluav taws xob.
Xws li polystyrene tiv taus cov tshuaj hnyav (alkalis, acids) thiab dej, tab sis raug rau tshav ntuj thiab cov kuab tshuaj.
Cov yas siab cuam tshuam ntau dua, tab sis yuav luag zoo ib yam thiab qhov ua kom sov. Cov khoom tau los ntawm extrusion polymerization tau suav tias yog cov khoom siv zoo tshaj plaws rau rwb thaiv tsev cua sov, thiab nws qhov kev ua tau zoo yog qhov tshwj xeeb.
- Polymer nplooj ntawv muaj cov dej noo zoo tiv taus.
- Lawv ua siab ntev nyiaj subzero kub.
- Lawv tau ua kom ntev dua.
- Lawv yog tus phooj ywg ib puag ncig hauv lawv cov muaj pes tsawg leeg.
- Tsis cuam tshuam los ntawm kev tawm tsam.
- Lawv muaj cov thermal conductivity tsawg thiab lub neej ua haujlwm ntev.
- Tsis txhob rot, xeb lossis pwm.
Cov ntawv yas ntawm hom no qiv lawv tus kheej rau ntau txoj hauv kev ua haujlwm - polishing thiab varnishing, milling, sawing, sib sau ua ke siv lub tshuab nqus tsev thiab cua sov ua haujlwm, luam ntawv xim, metallization thiab drilling. Tib txoj kev kho mob uas tsis tuaj yeem siv rau cov khoom siv yog vuam hluav taws xob, vim yas muaj cov yam ntxwv hluav taws xob zoo.
Tab sis extruded polystyrene muaj qhov tsis zoo - qib qis ntawm kev tiv thaiv hluav taws. Txawm li cas los xij, cov khoom tsis hlawv tawm, vim cov khoom siv tua tus kheej. Rau ntau lub hom phiaj, pob tshab lossis dawb yas yas siv. Tab sis nws kuj tseem tuaj yeem ua xim, uas ua tiav los ntawm kev ntxiv cov xim tsim nyog thaum tsim khoom lossis los ntawm kev thov cov zas xim rau qhov chaw tiav lawm. Cov khoom hauv qab no feem ntau siv hauv kev tsim kho:
- glossy polystyrene;
- yas nrog daim iav nto;
- khoom matte.
Qhov ntev ntawm cov ntaub ntawv yog sib txawv: qhov ntev ntawm 1000 txog 3500 hli, qhov dav yog 1000-2000 hli. Cov tuab ntawm cov khoom sib txawv ntawm 1 txog 3 hli. Nws yuav tsum tau ntxiv tias cov ntawv polymer yooj yim rau txheej txheem, nws muaj tus nqi pheej yig, thiab qhov no tseem cuam tshuam rau kev sib tw ntawm cov khoom.
Kev siv tshuab ntau lawm
Polystyrene tau tsim los siv ntau yam thev naus laus zis
Txoj kev ncua . Muab rau polymerization ntawm phenylethylene nyob rau hauv siab nrog maj mam nce hauv qhov kub thiab txias. Thaum lub sijhawm txheej txheem no, qhov kev ncua raug tsim tawm, uas tau muab tso rau hauv lub centrifuge kom tau txais cov khoom kawg. Tom qab ntawd, cov yas ua tiav raug ntxuav thiab qhuav. Nws twb tau txiav txim siab tias yog txoj kev dhau los, yog li nws tsuas yog siv rau kev tsim khoom ntawm copolymers thiab nthuav polystyrene.
Cov thev naus laus zis niaj hnub thaiv kev tsim polystyrene . Txoj kev siv tam sim no niaj hnub no hauv feem ntau cov nroj tsuag tshuaj lom neeg. Nws qhov zoo nyob hauv qhov tseeb tias cov khoom lag luam zoo dua qub, thiab kev tsim cov tshuaj polymer nws tus kheej yog siv yam tsis muaj pov tseg. Cov txheej txheem ntawm kev tsim cov khoom siv muaj ntau theem, tab sis ntawm no, ib yam, nce zuj zus hauv qhov ntsuas kub tau muab raws li ob txoj hauv kev - ua tsis tiav thiab hloov pauv kom tiav.
Tsis tshua muaj tshwm sim, cov khoom lag luam tau txais siv cov txheej txheem emulsion . Txhawm rau ua ib daim ntawv ntawm polystyrene, styrene yog polymerized hauv cov tshuaj alkali nyob rau hauv qhov cuam tshuam ntawm qhov kub siab (86-95 degrees). Cov khoom lag luam tau txais nrog cov ntim khoom loj, vim tias tsis yog tsuas yog cov pa roj carbon (vinyl benzene) nkaus xwb, tab sis kuj yog cov emulsifier, dej, organic peroxides, uas yog cov ua haujlwm (cov pib) ntawm polymerization, raug coj los ua raw khoom.
Yooj yim muab, cov txheej txheem ntawm kev tsim cov khoom siv muaj cov theem hauv qab no: cua sov styrene granules hauv cov extruder, ua npuas ncauj thiab hloov pauv ntxiv ntawm cov ntaub ntawv raw mus rau hauv yob lossis ntawv.
Daim ntawv thov
Vim nws muaj ntau yam ntxwv ua tau zoo thiab ua tau zoo, cov khoom siv tau nquag siv hauv cov hauv qab no
- Raws li kev kho kom zoo nkauj sab hauv thiab sab nrauv. Sandwich panels, nplaum, ua kom tsis muaj suab nrov thiab rwb thaiv tsev cov khoom tsim los ntawm polystyrene. Sab nrauv ntawm lub tsev thiab lwm yam txheej txheem yog thaiv nrog cov khoom ua npuas.
- Hauv kev kho mob. Cov khoom siv yog siv los ua cov twj, lub raj xa dej, lub raj mis, Petri tais thiab lwm yam khoom siv kho mob.
- Kev phooj ywg zoo ib puag ncig thiab tsis muaj kev puas tsuaj ntawm polystyrene rau kev noj qab haus huv ua rau nws muaj peev xwm ua cov khoom siv hauv tsev los ntawm nws - tais diav, ntim khoom, sau cov tais diav, menyuam cov khoom ua si, ntau yam ntim rau hauv tsev. Nws kuj yog qhov zoo tshaj plaws rau kev tsim cov dab da dej thiab da dej.
- Cov hauv paus rau tshuaj ntsuam luam ntawv yog ua los ntawm polymer.
- Polystyrene ua rau lub teeb pom kev zoo, yog li ntawd, rau kev ua liaj ua teb, thav duab rau lub tsev cog khoom thiab tsev cog khoom tau tsim, uas iav tau hloov nrog yas pob tshab.
- Polymer yog siv rau kev lag luam thiab tub rog lub hom phiaj - nws tau siv los tsim cov tsev tsim khoom, lub tshuab cua tshuab, cov cuab yeej siv, cov khoom tawg.
- Cov ntim yas rau kev lag luam khoom noj kuj tseem ua los ntawm polystyrene, piv txwv li, ntim cov tais uas tsim los ntim cov mis lossis cov khoom noj.
- Hauv kev tsim hluav taws xob, cov khoom siv los ua cov yeeb yaj kiab rau kev ua kom sib txuas hauv cov xov hlau thiab cov xov hlau, ntxiv rau tsim cov tsev rau khoom siv hauv tsev - tshuab ntxhua khaub ncaws, tub yees, thiab lwm yam.
- Ib qho ntxiv, yas tau pom daim ntawv thov hauv kev tshaj tawm - cov paib, cov paib, cov paib ntawm lub qhov rooj ntawm cov khw, tsev so, chaw noj mov, tsoomfwv cov tsev haujlwm tau tsim los ntawm nws.
Polystyrene yog pob nyiaj siv, ruaj thiab cov khoom hnyav nrog ntau yam khoom zoo. Tab sis nws tseem yog cov yas pheej yig tshaj plaws, uas piav qhia nws qhov tshwj xeeb thiab xav tau.
Pom zoo:
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