ʻO PBAT (polybutylene terephthalate) kahi pōkole no polybutylene terephthalate. ʻO nā mea maka no ka hoʻomākaukau ʻana i ka PBAT ka nui o ka adipic acid (AA), terephthalic acid (PTA), butylene glycol (BDO) ma ke ʻano he monomers, e like me kekahi hapa o ka esterification a i ʻole transesterification reaction a me ka polycondensation reaction e synthesize polyadipic acid/butylene terephthalate. ester, a laila ma o ka esterification, polycondensation a me ka granulation ʻekolu mau ʻanuʻu e hoʻomākaukau ai i ka huahana hope. Loaʻa i ka PBAT nā apo benzene, no laila he kiʻekiʻe ka molecular thermal stability, akā haʻahaʻa haʻahaʻa molecular degradation rate; noho nā molekala i kahi ākea nui a kūpono i ka hui ʻana me nā molela ʻē aʻe; Loaʻa iā ia nā kaulahao momona, kahi e hōʻoiaʻiʻo ai i ka loli maikaʻi o nā kaulahao mole a no laila ka ductility maikaʻi.
PBAT mea he semi-crystalline polymer, maʻamau ka crystallization wela ma kahi o 110 °C, a me ka helu heheʻe ma kahi o 130 °C, a me ka mānoanoa ma waena o 1.18g/ml~1.3g/ml. ʻO ka crystallinity o PBAT ma kahi o 30%, a ʻoi aku ka paʻakikī o Shore ma luna o 85. ʻO ka PBAT he copolymer o nā hui aliphatic a me nā hui aromatic, kahi e hui pū ai i nā waiwai degradation maikaʻi loa o nā polyesters aliphatic a me nā waiwai mechanical maikaʻi o nā polyesters aromatic. ʻO ka hana hana o ka PBAT e like loa me LDPE, a hiki ke puhi ʻia ke kiʻi me nā mea hana LDPE.
He biodegradability maikaʻi ko PBAT, a ʻo nā huahana i hana ʻia me ka PBAT ua maʻalahi a hoʻohaʻahaʻa loa ʻia me ke kōkua o nā microorganisms maoli a me nā bacteria, i hoʻololi ʻia i carbon dioxide a me ka wai. Ma muli o kona ductility maikaʻi, elongation i ka haʻihaʻi, ka wela a me ka hopena o ka hopena, hiki ke hoʻohana ʻia ka PBAT i ka ʻoihana paʻi palaki, e like me nā ʻeke kūʻai, ʻeke ʻōpala, a me nā mea ʻē aʻe, a hoʻohana pū ʻia i ka papa ʻaina, mulch film a me nā māla ʻē aʻe.
Ka manawa hoʻouna: Jan-19-2023