Video: Yuav ua li cas kho phenolic resin?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Novolac resins yog thermally ruaj khov thiab tuaj yeem kho tau los ntawm kev sib txuas nrog cov neeg pub dawb formaldehyde xws li hexamethylenetetramine. Txawm li cas los xij, feem ntau siv dav phenolic resins rau composites yog resoles tsim los ntawm reacting phenol nrog ib tug ntau dua equimolar tus nqi ntawm formaldehyde nyob rau hauv alkaline tej yam kev mob.
Ib yam li ib tug yuav nug, dab tsi yog kev siv phenolic resin?
Phenolic resins muaj nyob rau hauv ib tug myriad ntawm industrial cov khoom. Lawv feem ntau yog siv nyob rau hauv zus tau tej cov circuit boards. Lawv paub zoo dua rau kev tsim cov khoom molded nrog rau cov pob billiards, chav kuaj countertops, thiab ua cov txheej thiab cov nplaum.
Dab tsi yog qhov txawv ntawm epoxy resin thiab phenolic resin? Thaum ob qho tib si ntawm qhov chaw kuaj mob no resin , lawv txawv hauv txoj kev lawv tsim. Namely, phenolic cob countertops yog ua nyob rau hauv txheej. Epoxy , ntawm qhov tod tes, yog ua los ntawm kev sib xyaw ntawm cov ntaub ntawv suav nrog resin , silica, fillers, thiab hardeners uas tom qab ntawd tsim los rau hauv cov khoom lag luam.
Tsis tas li ntawd, phenolic resin puas txaus ntshai?
1. Amino thiab phenolic resins muaj formaldehyde, uas yog heev tshuaj lom los ntawm inhalation, heev tshuaj lom los ntawm qhov muag sib cuag thiab noj, thiab nruab nrab tshuaj lom los ntawm kev sib cuag ntawm daim tawv nqaij.
phenolic txheej yog dab tsi?
Phenolic coatings muab kev tiv thaiv corrosion zoo zoo rau ntau yam kev siv nrog rau kev pabcuam rau cov kua qaub feem ntau, cov kuab tshuaj, thiab ntsev. Qhov no epoxy phenolic txheej yog tshuaj resistant thiab feem ntau siv nyob rau hauv qhov chaw uas tsis muaj pH ib puag ncig thiab siab dua kub yog yam tseem ceeb.
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