kev ceev faj siv cov tshuaj sulfur dub

sulfur dub 240%yog ib qho tshuaj molecular siab uas muaj ntau sulfur, nws cov qauv muaj disulfide bonds thiab polysulfide bonds, thiab nws tsis ruaj khov heev. Tshwj xeeb, polysulfide bond tuaj yeem oxidized rau sulfur oxide los ntawm oxygen hauv huab cua nyob rau hauv qee qhov kub thiab txias thiab av noo, thiab ntxiv cuam tshuam nrog cov dej molecules hauv huab cua los tsim sulfuric acid, yog li txo qhov muaj zog ntawm cov xov paj, fiber brittleness, thiab txhua lub fibers yog embrittle rau hauv hmoov thaum loj. Vim li no, txhawm rau txo lossis tiv thaiv kev puas tsuaj ntawm fiber brittleness tom qab dyeing nrog vulcanized dub dye, cov ntsiab lus hauv qab no yuav tsum tau sau tseg:

① Tus nqi ntawm cov xim dub vulcanized yuav tsum raug txwv, thiab tus nqi ntawm cov xim tshwj xeeb mercerized yuav tsum tsis pub tshaj 700g / pob. Vim tias tus nqi ntawm cov xim yog siab, qhov muaj feem ntawm brittleness yog loj, thiab qhov dyeing fastness txo qis, thiab ntxuav yog nyuaj dua.

② Tom qab zas xim, nws yuav tsum tau ntxuav kom huv si kom tiv thaiv kev ntxuav tsis huv, thiab cov xim ntab ntawm cov xov paj yooj yim rau decompose rau hauv sulfuric acid thaum lub sijhawm khaws cia, uas ua rau cov fiber brittle.

③ Tom qab zas xim, urea, soda tshauv thiab sodium acetate yuav tsum tau siv rau kev kho mob tiv thaiv kev tawg.

④ Cov xov paj raug rhaub hauv dej huv ua ntej zas xim, thiab qib embrittlement ntawm cov xov paj zas xim hauv dej huv zoo dua li ntawm lye tom qab zas xim.

⑤ Cov xov paj yuav tsum tau qhuav raws sijhawm tom qab zas xim, vim tias cov xov paj ntub yooj yim rau cua sov hauv cov txheej txheem pawg, yog li cov ntsiab lus ntawm cov xov paj tiv thaiv kev tawg paj txo qis, tus nqi pH txo qis, uas tsis zoo rau kev tiv thaiv kev tawg paj. Tom qab ziab cov xov paj, nws yuav tsum tau txias ntuj, yog li qhov kub ntawm cov xov paj tuaj yeem ntim ua ntej poob rau hauv chav tsev kub. Vim tias nws tsis txias tom qab ziab thiab ntim tam sim ntawd, qhov kub tsis yooj yim faib, uas ua rau lub zog rau kev lwj ntawm cov xim thiab cov kua qaub, ua rau muaj peev xwm ntawm cov fiber kom tawg paj.

⑥Kev xaiv cov xim dub tiv thaiv brittle-sulfur, cov xim no tau ntxiv rau formaldehyde thiab chloroacetic acid thaum tsim khoom, qhov tshwm sim methyl-chlorine vulcanized anti-brittle-dub, yog li ntawd cov sulfur atoms yooj yim oxidized ua lub xeev ruaj khov, uas tuaj yeem tiv thaiv qhov oxidation ntawm sulfur atoms los tsim cov kua qaub thiab brittle fiber.