Tetrahydrofuran/CAS:109-99-9

Ko te Tetrahydrofuran, e whakarapopototia ana ko te THF, he matū rauropi heterocyclic. Nō te akomanga etera, he hua hauwai katoa o te matū kakara furan. Ko te Tetrahydrofuran tētahi o ngā etera polar kaha rawa atu, e whakamahia ana hei whakarewa polarity reo i roto i ngā tauhohenga matū me te tango. He wai kore tae, he pūngāwerewere i te pāmahana rūma, he rite te kakara ki te etera. Ka rewa i roto i te nuinga o ngā whakarewa rauropi pērā i te wai, te etanoru, te etera, te acetone, me te benzene, ka kiia he "whakarewa whānui". I te pāmahana rūma, ka uru te wai ki te wai, ā, ka whakamahia e ētahi kaihokohoko matū ture kore tēnei hei whiwhi moni nui mā te whakaranu i te matū tetrahydrofuran ki te wai. Nā te āhua o te THF ki te hanga i ngā peroxide i te wā rokiroki, ka tāpirihia e ngā hua ahumahi te BHT antioxidant. Ko te ihirangi makuku ≤ 0.2%. He āhuatanga o te paitini iti, te iti o te kohua, me te rere pai.

Whakamahinga

1. Ko te tauhohenga hanga spandex o ngā rauemi mata tetrahydrofuran ka taea te polycondensation (mā te cation i tīmatahia te mowhiti-whakatuwhera polymerization) ki te polytetramethylene ether glycol (PTMEG), e mōhiotia ana ko te tetrahydrofuran homopolymerization ether. Ko te PTMEG me te toluene diisocyanate (TDI) i hangaia mai i te ātete-aukati, te ātete-hinu, te mahi pāmahana iti, te kaha teitei o ngā rapa motuhake; ā, ko te dimethyl terephthalate me te 1,4-butanediol i hangaia mai i ngā rauemi elastomer polyester poraka polyether. Ko te papatipu ngota whanaunga o te PTT he 2,000. Ko te papatipu ngota whanaunga o te 2000 PTMEG me te p-methylene bis (4-phenyl) diisocyanate (MDI) he mea hanga mai i ngā muka polyurethane elastic (spandex, muka SPANDEX), ngā rapa motuhake me ētahi paninga motuhake. Ko te THF te whakamahinga nui rawa atu mō te hanga PTMEG, e ai ki ngā tatauranga whānui, neke atu i te 80% o te THF o te ao e whakamahia ana mō te hanga PTMEG, me te PTMEG, me te PTMEG, me te PTMEG, me te PTMEG, me te PTMEG, me te PTMEG, me te PTMEG, me te PTMEG. Ko te PTMEG, me te PTMEG te nuinga e whakamahia ana mō te hanga muka spandex elastic.
2. Ko te whakarewa mahi tino pai te tetrahydrofuran he whakarewa pai e whakamahia whānuitia ana, inā koa mō te whakarewa i te PVC, te polyvinylidene chloride me te butylaniline, e whakamahia whānuitia ana hei whakarewa mō ngā paninga mata, ngā paninga ārai-waikura, ngā waituhi tā, ngā rīpene me ngā paninga kiriata mō te electro-Chemicalbook Aluminium Plating Liquid ka taea te whakahaere i te matotoru o te konumohe me te kanapa. Ko te paninga rīpene aukume, te paninga mata PVC, te horoi i te tauhohenga PVC, te tango i te kiriata PVC, te paninga cellophane, te waituhi tā kirihou, te paninga polyurethane thermoplastic, ngā whakarewa mō ngā piri, e whakamahia whānuitia ana i roto i ngā paninga mata, ngā paninga tiaki, ngā waituhi, ngā tangohanga me ngā kaihoko maimoatanga mata mō te hiako horihori hangai.
3. Whakamahia hei rauemi mata mō te hanga rauropi pērā i ngā rongoā e whakamahia ana i roto i te hanga tetrahydrothiophene, 1.4 - dichloroethane, 2.3. Ka whakamahia hei hanga tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyrolactone me te pyrrolidone. I roto i te umanga rongoā, ka whakamahia mō te hanga mare, Rifamycin, progesterone me ētahi rongoā homoni. Ka hangaia te Tetrahydrothiophenol mā te maimoatanga hauwai sulfide, ka taea te whakamahi hei kakara i roto i te hau wahie (tāpiri tautuhi), ā, koia hoki te whakarewa matua i roto i te umanga rongoā.
4. Ētahi atu Whakamahinga Ko te whakarewa chromatography (gel permeation chromatography), e whakamahia ana mō te whakareka o te hau māori, te whakarewa mō te tango acetylene, me ngā whakaū mārama mō ngā rauemi polymer. Nā te whānui o te whakamahinga o te tetrahydrofuran, inā koa te tere o te tipu o te umanga spandex o Haina i ngā tau tata nei, kei te piki haere te tono a Haina mō te PTMEG, ā, ko te hua o tēnei tono mō te tetrahydrofuran he ia tere tipu hoki.

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