Cov ntaub ntawv yas pob tshab yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob hauv hluav taws xob, feem ntau yog siv rau hauv lub thawv sib txuas. Yog li dab tsi yog cov khoom tseem ceeb ntawm lub thawv yas pob tshab?
Feem ntau siv cov ntaub ntawv pob tshab yas yog:
1. Polymethylmethacrylate (PMMA)
Feem ntau hu ua plexiglass, nws yog cov yas nrog cov khoom siv kho qhov muag zoo tshaj plaws. Cov khoom siv hluav taws xob thiab hluav taws xob ntawm PMMA yog dav dav, lub thermal expansion coefficient yog 8-10 lub sij hawm ntawm cov iav inorganic, lub sij hawm ntev siv kub tsuas yog 80 degrees, thiab hygroscopicity siab.
2. Polycarbonate (PC)
Nws yog pob tshab engineering yas nrog cov khoom zoo heev, thiab cov khoom kho qhov muag ntawm PC tsuas yog qis dua li PMMA. Txawm li cas los xij, nws yog kub-resistant thiab txias-resistant, thiab muaj peev xwm tswj tau cov khoom ruaj khov hauv thaj tsam ntawm -135-120 degrees.
3. Styrene-methyl methacrylate copolymer (MS)
Nws yog tsim los ntawm 70% styrene thiab 30% methyl methacrylate copolymer. Lub teeb xa hluav taws xob ntawm cov copolymer zoo dua li ntawm PS, thaum tswj cov dej ntws zoo ntawm PS.
4. Polystyrene (PS)
Ua ke nrog PMMA thiab PC, lawv hu ua peb lub pob tshab yas loj. Nws cov khoom kho qhov muag tsis zoo dua PMMA, tab sis qhov nqus dej noo tsawg, thiab huab cua tsis kam ntawm PS cov khoom tsis zoo, thiab nws yuav tig daj thiab turbid tom qab lub sij hawm ntev cia thiab tshav ntuj raug.
5. Styrene acrylonitrile feem ntau hu ua AS thiab SAN
Nws muaj 20 feem pua -30 feem pua qhov loj ntawm acrylonitrile monomer, thiab tus so yog styrene monomer copolymerized nrog nws. Kev xa tawm ntawm AS zoo ib yam li PS, tab sis qhov ntsuas qhov cuam tshuam qis dua me ntsis. Qhov siab tshaj plaws kev siv kub ntawm cov khoom siv AS yog 10 degrees siab dua li ntawm PS, thiab cov khoom siv kho tshuab, huab cua tsis kam thiab kev ntxhov siab tawg kuj tseem txhim kho.
