Mea Polyester

He ʻano o ka polyesternā polymersaia i loko o kaʻesetona hui hanai kēlā me kēia ʻāpana hana hou o kā lākou kaulahao nui. Ma ke ʻano he kikoʻīmea hana, ʻo ia ka mea maʻamau e pili ana i kahi ʻano i kapa ʻiapolyethylene terephthalate(PET). Aia nā kemika kūlohelohe i loko o nā polyesters, e like menā mea kanua menā pepeke, a me nā mea synthetic e like mepolybutyrateʻO nā polyesters kūlohelohe a me kekahi mau mea syntheticpalaho kūlohelohe, akā ʻaʻole ka hapa nui o nā polyesters synthetic. Hoʻohana nui ʻia nā polyesters synthetic i nā lole.

I kekahi manawa, ua milo pū ʻia nā olonā polyester me nā olonā kūlohelohe e hana i kahiloleme nā waiwai i hui pū ʻia.Pulupulu-Hiki i nā hui polyester ke ikaika, kūpaʻa i ka wrinkle a me ka haehae, a hōʻemi i ka emi ʻana.Nā olonā hanaʻO ka hoʻohana ʻana i ka polyester he kiʻekiʻe ka pale ʻana i ka wai, ka makani a me ke kaiapuni i hoʻohālikelike ʻia me nā olonā i loaʻa mai nā mea kanu. ʻOi aku ka liʻiliʻi o lākoupale ahia hiki ke heheʻe i ka wā e hoʻā ʻia ai.

ʻO nā polyesters crystalline wai kekahi o nā mea mua i hoʻohana ʻia ma ka ʻoihananā polymers kristal waiHoʻohana ʻia lākou no ko lākou mau waiwai mechanical a me ke kūpaʻa wela. He mea nui hoʻi kēia mau ʻano i kā lākou noi ʻana ma ke ʻano he sila hiki ke nakinaki ʻia i nā ʻenekini jet.

ʻO nā polyesters e kū nei ma ke ʻano e komo pū mecutinʻāpana onā ʻokiʻoki mea kanu, nona kanā waikawa hydroxy omegaa me kā lākou mau derivatives, i hoʻopili ʻia ma oʻesetonanā mea paʻa, e hana ana i nā polymers polyester o ka nui indeterminate. Hana ʻia nā polyesters enā pii loko o ka ʻanoNā Koleta, ka mea e hūnā ai i kahicellophane-e like me ka polyester lining no ko lākou mau cell brood ma lalo o ka honua e loaʻa ai iā lākou ka inoa kapakapa "nā pi polyester".

Ma muli o ke ʻano kemika, hiki i ka polyester ke lilo iplastik welaa i ʻolehoʻonohonoho welaAia pū kekahinā resins polyesterhoʻōla ʻia e nā mea paʻakikī; akā naʻe, ʻo nā polyesters maʻamau he thermoplastics.[11]Hoʻopili ʻia ka hui OH me kahiʻIsocyanatehui hana i loko o kahi ʻōnaehana ʻāpana 2 e hana ana i nā uhi i hiki ke koho ʻia he pigmented. Hiki i nā polyesters ma ke ʻano he thermoplastics ke loli ke ʻano ma hope o ka hoʻopili ʻana o ka wela. ʻOiai hiki ke puhi ʻia i nā mahana kiʻekiʻe, ʻoi aku ka emi ʻana o nā polyesters mai nā lapalapa a pio iā ia iho i ka wā e hoʻā ʻia ai. Loaʻa i nā olonā polyester ke kiʻekiʻekūpaʻaa meModulus-Ea me ka haʻahaʻa o ka omo ʻana o ka wai a me ka liʻiliʻiemi ʻanai ka hoʻohālikelike ʻana me nā olonā ʻoihana ʻē aʻe.

ʻO ka hoʻonui ʻana i nā ʻāpana ʻala o nā polyesters e hoʻonui i kā lākoumahana hoʻololi aniani, ka mahana heheʻe,kūpaʻa wela, ke kūpaʻa kemika, a me ke kūpaʻa i ka mea hoʻoheheʻe.

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