Mea Polyester

ʻO ka polyester kahi ʻano opolymersaia i loko o kaester hui hanai kēlā me kēia ʻāpana hou o kā lākou kaulahao nui.Ma keʻano he kiko'īmea waiwai, pili pinepine ia i kahi ʻano i kapa ʻiapolyethylene terephthalate(PET).Hoʻokomo ʻia nā polyesters i nā kemika kūlohelohe, e like me ka inmea kanuanā pepeke, a me nā synthetics e like mepolybutyrate.ʻO nā polyesters kūlohelohe a me kekahi mau mea syntheticbiodegradable, akā ʻaʻole ka hapa nui o nā polyesters synthetic.Hoʻohana nui ʻia nā polyesters synthetic i nā lole.

I kekahi manawa, wili pū ʻia nā pulu poliester me nā pulu maoli e hana i kahiloleme na waiwai huikau.pulupulu-ʻO nā hui polyester hiki ke ikaika, wrinkle- a me ka waimaka, a hoʻemi i ka emi ʻana.ʻO nā fiber syntheticʻO ka hoʻohana ʻana i ka polyester i ka wai kiʻekiʻe, ka makani a me ke kūpaʻa kūlohelohe i hoʻohālikelike ʻia me nā fibers i loaʻa i nā mea kanu.He emi lākoupale ahia hiki ke hoohehee ke puhiia.

ʻO nā polyesters crystalline wai kekahi o nā mea hana mua i hoʻohana ʻiapolymers kristal wai.Hoʻohana ʻia lākou no ko lākou mau ʻano mechanical a me ka pale wela.He mea koʻikoʻi kēia mau hiʻohiʻona i kā lākou noi ʻana ma ke ʻano he sila abradable i nā mīkini jet.

ʻO nā polyesters e kū nei ma ke ʻano hecutinʻāpana omea kanu cuticles, i loko oomega hydroxy acidsa me kā lākou mau huaʻōlelo, i hoʻopili ʻia ma oesternā paʻa, e hana ana i nā polymer polyester o ka nui ʻole.Hana ʻia nā polyesters enā pii loko o ka genusʻO nā hui, ka mea huna acellophane-e like me ka polyester lining no kā lākou mau pūnāwai ma lalo o ka honua i loaʻa iā lākou ka inoa kapakapa "polyester bees".

Ma muli o ka hana kemika, hiki i ka polyester ke amea ʻeleʻelea i ʻolethermoset.Aia kekahipolyester resinshoolaia e na mea paakiki;akā naʻe, ʻo nā polyesters maʻamau he thermoplastics.[11]Hoʻopili ʻia ka pūʻulu OH me kahiIsocyanatepūhui hana i loko o kahi ʻōnaehana ʻāpana 2 e hana ana i nā uhi i hiki ke koho ʻia i ka puaʻa.Hiki ke loli ke ʻano o nā polyesters ma ke ʻano he thermoplastics ma hope o ka hoʻohana ʻana i ka wela.ʻOiai hiki ke hoʻopau ʻia i nā wela kiʻekiʻe, ʻo nā polyesters e emi iho mai ke ahi a hoʻopau iā ia iho i ka hoʻā ʻana.He kiʻekiʻe ka fiber polyesterpaʻa paʻaaE-modulusa me ka haʻahaʻa haʻahaʻa wai a me ka liʻiliʻihōʻemii ka hoʻohālikelike ʻana me nā fiber ʻoihana ʻē aʻe.

ʻO ka hoʻonui ʻana i nā ʻāpana ʻala o nā polyesters e hoʻonui i kā lākouaniani hoʻololi wela, ka wela hehee,paʻa wela, kūpaʻa kemika, a me ka pale ʻana i ka solvent.

Hiki nō hoʻi nā polyesterstelechelic oligomerse like me ka polycaprolactone diol (PCL) a me ka polyethylene adipate diol (PEA).A laila hoʻohana ʻia lākou e like meprepolymers.