Rauemi Polyester

Ko te polyester tētahi wāhanga ongā pūmuakei roto ngāester rōpū mahii roto i ia waeine tāruarua o tā rātou mekameka matua. Hei mea motuhakerauemi, e pā ana ki tētahi momo e kiia nei kopolyethylene terephthalate(PET). Kei roto i ngā polyesters ngā matū tūturu, pērā i roto ingā tipumengā pepeke, me ngā mea hangai pērā i tepolybutyrateKo ngā polyesters tūturu me ētahi mea hangai hepirau-ora, engari ko te nuinga o ngā polyesters hangai kāore i te pena. He nui te whakamahinga o ngā polyesters hangai i roto i ngā kākahu.

I ētahi wā ka mirohia ngā muka polyester me ngā muka taiao hei hanga i tētahikakahume ngā āhuatanga whakaranu.Miro-ka taea e ngā ranunga polyester te kaha, te ātete ki te kita me te haehae, ā, ka whakaiti i te mimiti.muka hangaiHe nui te ātete o te whakamahi i te polyester ki te wai, ki te hau, ki te taiao hoki, ki te whakaritea ki ngā muka tipu. He iti ake te ātete kiātete ahiā, ka taea te rewa ina tahuna.

Ko ngā polyesters tioata wai kei roto i ngā mea tuatahi e whakamahia ana i roto i te ahumahingā pūmua tioata waiE whakamahia ana ēnei mō ō rātou āhuatanga miihini me te ātete ki te wera. He mea nui anō hoki ēnei āhuatanga hei hiri ka taea te pakaru i roto i ngā miihini rererangi.

Ko ngā polyesters e kitea ana i te taiao kokutinwāhanga ongā kiriuhi tipu, kei roto kongā waikawa hauwai omegame ō rātou pānga, e honoa ana māesterngā hononga, e hanga ana i ngā pūhui polyester o te rahi kāore i te mōhiotia. Ka hangaia hoki ngā polyesters engā pīi roto i te iraNgā Koreti, e huna ana i tekirihou-he arai polyester mō ā rātou pūtau uri i raro i te whenua, ā, nā reira i tapaina ai rātou ko ngā "pī polyester".

I runga i te hanganga matū, ka taea e te polyester tekirihou werarāneiwhakamahana. Kei reira anō hokingā kapia polyesterka whakamaroketia mā te whakamahi i ngā whakapakeke; heoi, ko ngā polyesters tino noa ko ngā thermoplastics.[11]Ka tauhohe te rōpū OH ki tētahiIsocyanatehe matū mahi i roto i tētahi pūnaha wāhanga e rua e whakaputa ana i ngā paninga ka taea te tāpiri tae. Ka rerekē pea te āhua o ngā polyesters hei thermoplastics i muri i te whakamahinga o te wera. Ahakoa ka mura i ngā pāmahana teitei, ka memeha haere ngā polyesters mai i te mura, ā, ka tineia anō i te mura. He teitei ngā muka polyestermanawanuimeE-modulusme te iti o te mimiti wai, me te iti hokite mimitiki te whakataurite ki ētahi atu muka ahumahi.

Mā te whakanui ake i ngā wāhanga kakara o ngā polyesters ka nui ake tō rātoupāmahana whakawhiti karāhe, te pāmahana rewa,pumau wera, te pumau matū, me te ātete ki te whakarewa.

Ka taea hoki te whakamahi i ngā polyesterswaea-whakairoiro ngā oligomerpērā i te polycaprolactone diol (PCL) me te polyethylene adipate diol (PEA). Kātahi ka whakamahia heingā prepolymer.