Hua
He mea motuhake ki te hanga waipiro propargyl, 1,4 butynediol me te 3-chloropropyne
1,4-butanediol (BDO) me tana whakaritenga o te PBAT kirihou koiora
Kupu Whakataki
1, 4-butanediol (BDO);Ko te PBAT he kirihou hauhautanga koiora, he copolymer o te butanediol adipate me te butanediol terephthalate.Kei a ia nga ahuatanga o te PBA (polyadipate-1, 4-butanediol ester diol) me te PBT (polybutanediol terephthalate).He pai te ductility me te elongation i te wehenga, me te pai o te wera wera me te paanga o te mahi.I tua atu, he tino pai te koiora me tetahi o nga mea tino rongonui i roto i te rangahau o nga kirihou koiora me te tono pai rawa atu i te maakete.
E whai ake nei te hanganga o nga waahanga mekameka polymer PBAT:
Ko te hanga ahumahi o 1, 4-butanediol kua tutuki i roto i nga tukanga matua e wha.
1. Tikanga Aldehyde (Reppe tikanga): te acetylene tuatahi me te formaldehyde i te aroaro o te Cu-BI catalyst ki te hanga 1, 4-butynediol.Ko te mea whakamutunga ka hauwaitia ki te 1, 4-butenediol ma te nickel skeleton, ka whai ko Ni-Cu-Mn/Al2O3 ki te 1, 4-butanediol.
2. Te hauwai anhydride maleic: kua wehea ano ki te hauwaitanga hauwai anhydride maleic me te hauwaitanga tika anhydride maleic.
3. Tikanga Butadiene: mai i te 1, 3-butadiene me te acetic acid me te oxygen acetyl oxidation tauhohenga, ki te whakaputa i te 1, 4-diacetyloxy-2-butadiene, katahi ka hauwai, hydrolysis.
4. tikanga propylene oxide (te tikanga waipiro allyl): te propylene oxide hei rauemi mata, te isomerization catalytic ki te waipiro allyl, i roto i te phosphine ligand whakakōkī i raro i te mahi o te tauhohenga hydroformylation ki te whakaputa i te hua matua γ-hydroxypropanal, a ka tangohanga, hydrogenation, para ki te tiki BDO.
Ko te tikanga Reppe te tikanga tuku iho hei whakaputa i te BDO, he mea hanga i runga i te acetylene me te formaldehyde hei rauemi mata, te whakahiato me te hauwai o nga hikoinga e rua hei whakaputa i te BDO: ① acetylene me te tauhohenga formaldehyde ki te whakaputa i te 1, 4-butynediol me te waipiro propargyl hei hua kee ;②1, 4-butanediol ka hauwaitia hei hanga 1, 4-butanediol.
He [ara hau/hinu maori] me te [ara waro] te whakarite acetylene : te whakamahi i te coke me te kirikiri i roto i te oumu wera teitei hei whakaputa i te konupūmā carbide, calcium carbide me te tauhohenga wai ki te whakaputa acetylene;Ko te acetylene ka puta mai i te hau maaori, te hinu ranei na roto i te waiora o te mewaro.
