Ko te rerekētanga i waenga i te momo TPU polyether me te momo polyester

Ko te rerekētanga i waenganui iMomo polyether TPUmemomo polyester

E rua ngā momo TPU: te momo polyether me te momo polyester. E ai ki ngā whakaritenga rerekē o ngā tono hua, me whiriwhiri ngā momo TPU rerekē. Hei tauira, ki te mea he teitei ngā whakaritenga mō te ātete ki te waikura, he pai ake te momo TPU polyether i te momo TPU polyester.

Nō reira, i tēnei rā, me kōrero tātou mō ngā rerekētanga i waenganui imomo TPU polyethermemomo TPU polyester, ā, me pēhea te wehewehe i a rātou? Ka whakamāramahia e ngā mea e whai ake nei ngā āhuatanga e whā: ngā rerekētanga o ngā rauemi mata, ngā rerekētanga hanganga, ngā whakatairite mahi, me ngā tikanga tautuhi.

1. Ngā rerekētanga o ngā rauemi mata

Ki taku whakaaro he tokomaha te hunga e mōhio ana ki te ariā o ngā elastomers thermoplastic, arā, ko te āhuatanga hanganga o ēnei he whakauru i ngā wāhanga ngohengohe me ngā wāhanga mārō, hei whakaputa i te ngāwari me te pakari ki te rauemi.

Kei roto hoki i te TPU ngā wāhanga mekameka ngohengohe me ngā wāhanga mekameka mārō, ā, ko te rerekētanga i waenga i te momo TPU polyether me te momo TPU polyester kei roto i te rerekētanga o ngā wāhanga mekameka ngohengohe. Ka kitea te rerekētanga mai i ngā rauemi mata.

Momo TPU polyether: 4-4'- diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), 1,4-butanediol (BDO), me te horopeta tata ki te 40% mō te MDI, 40% mō te PTMEG, me te 20% mō te BDO.

Momo TPU polyester: 4-4 '- diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), waikawa adipic (AA), ko te MDI te 40%, ko te AA te 35%, ā, ko te BDO te 25%.

Ka kitea e tātou ko te rauemi mata mō te wāhanga mekameka ngohengohe momo TPU polyether ko te polytetrahydrofuran (PTMEG); Ko te rauemi mata mō ngā wāhanga mekameka ngohengohe momo TPU polyester ko te waikawa adipic (AA), ka tauhohe te waikawa adipic ki te butanediol hei hanga i te polybutylene adipate ester hei wāhanga mekameka ngohengohe.

2. Ngā rerekētanga hanganga

He hanganga raina poraka momo-n (AB) te mekameka ngota o te TPU, ko A he polyester, he polyether rānei he taumaha ngota teitei (1000-6000), ko B he butanediol te tikanga, ā, ko te hanganga matū i waenga i ngā wāhanga mekameka AB he diisocyanate.

E ai ki ngā hanganga rerekē o A, ka taea te wehewehe i ngā TPU ki te momo polyester, te momo polyether, te momo polycaprolactone, te momo polycarbonate, me ētahi atu. Ko ngā momo e tino kitea ana ko te momo polyether TPU me te momo polyester TPU.

Mai i te pikitia i runga ake nei, ka kitea ko ngā mekameka ngota ngota whānui o te momo TPU polyether me te momo TPU polyester he hanganga rārangi, ko te rerekētanga matua ko te mea he polyol polyether, he polyol polyester rānei te wāhanga mekameka ngohengohe.

3. Whakataurite mahi

Ko ngā polyol polyether he pūhui waipiro, he oligomer rānei me ngā here ether me ngā rōpū hydroxyl i ngā rōpū mutunga o te hanganga mekameka matua o te ngota ngota. Nā te iti o te kaha piripono o ngā here ether i roto i tōna hanganga me te ngāwari o te huri.

Nō reira, he tino pai te ngāwari o te TPU polyether ki te pāmahana iti, te ātete ki te waikura, te ātete ki te pokepokea ai, te ātete ki te UV, me ētahi atu. He pai te pa ki te ringa o te hua, engari he ngoikore te kaha o te kiri me te kaha o te pakaru.

Ka taea e ngā rōpū ester me te kaha hononga kovalent kaha i roto i ngā polyol polyester te hanga hononga hauwai me ngā wāhanga mekameka mārō, hei pūwāhi hononga whakawhiti rapa. Heoi, he ngāwari te pakaru o te polyester nā te whakaekenga mai o ngā ngota wai, ā, ka taea e te waikawa i puta mai i te hydrolysis te whakakorikori ake i te hydrolysis o te polyester.

Nō reira, he pai ngā āhuatanga miihini o te polyester TPU, he ātete kakahu, he ātete haehae, he ātete waikura matū, he ātete pāmahana teitei, he ngāwari te tukatuka, engari he iti te ātete ki te waikura.

4. Tikanga tautuhi

Mō te TPU pai ake hei whakamahi, me whiriwhiri noa i runga i ngā whakaritenga ā-tinana o te hua. Hei whakatutuki i ngā āhuatanga miihini pai, whakamahia te TPU polyester; ki te whakaarohia te utu, te mātotoru, me te taiao whakamahinga hua, pēnei i te hanga hua whakangahau wai, he pai ake te TPU polyether.

Heoi, ina whiriwhiria, ina whakaranua rānei ngā momo TPU e rua, kāore he rerekētanga nui o te āhua. Nō reira, me pēhea tātou e wehewehe ai i a rātou?

He maha ngā tikanga, pērā i te ine tae matū, te ine chromatography hau-papatipu (GCMS), te ine wherikotanga waenga-whero, me ētahi atu. Heoi, he nui ngā whakaritenga hangarau e hiahiatia ana mō ēnei tikanga, ā, he roa te wā e pau ana.

He tikanga tautuhi ngāwari, tere hoki? Āe te whakautu, hei tauira, he tikanga whakatairite mātotoru.

Kotahi anake te taputapu whakamātautau kiato e hiahiatia ana mō tēnei tikanga. Hei tauira, he mita kiato rapa tino tika, ko ngā mahi ine ko:

Whakatakotoria te hua ki roto i te ripanga ine, whakaaturia te taumaha o te hua, ka pēhi i te pātene Tomo hei maumahara.
Whakatakotoria te hua ki roto i te wai hei whakaatu i te uara mātotoru.
E rima hēkona te roa o te tukanga ine katoa, kātahi ka taea te wehewehe i runga i te mātāpono he teitei ake te mātotoru o te momo TPU polyester i te momo TPU polyether. Ko te awhe mātotoru motuhake ko: momo TPU polyether -1.13-1.18 g/cm3; Polyester TPU -1.18-1.22 g/cm3. Mā tēnei tikanga ka taea te wehewehe wawe i waenga i te momo TPU polyester me te momo polyether.