Bambanci tsakaninTPU polyether irinkumanau'in polyester
Ana iya raba TPU zuwa nau'i biyu: nau'in polyether da nau'in polyester. Dangane da buƙatun daban-daban na aikace-aikacen samfur, ana buƙatar zaɓar nau'ikan TPU daban-daban. Alal misali, idan buƙatun don juriya na hydrolysis sun yi girma, nau'in polyether TPU ya fi dacewa fiye da nau'in polyester TPU.
Don haka a yau, bari mu yi magana game da bambance-bambancen da ke tsakaninTPU polyetherkumaTPU polyester, da kuma yadda za a bambanta su? Abubuwan da ke biyowa za su fayyace kan abubuwa huɗu: bambance-bambance a cikin albarkatun ƙasa, bambance-bambancen tsari, kwatancen aiki, da hanyoyin ganowa.
1. Bambance-bambance a cikin albarkatun kasa
Na yi imani da yawa mutane sun san ra'ayi na thermoplastic elastomers, wanda ke da tsarin tsarin da ke dauke da sassa masu laushi da wuya, bi da bi, don kawo sassauci da rigidity ga kayan.
Har ila yau, TPU yana da sassan sassa masu laushi da wuyar gaske, kuma bambanci tsakanin nau'in polyether TPU da nau'in polyester TPU ya ta'allaka ne a cikin sassan sarkar mai laushi. Za mu iya ganin bambanci daga albarkatun kasa.
Nau'in polyether TPU: 4-4 '- diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), 1,4-butanediol (BDO), tare da sashi na kusan 40% don MDI, 40% don PTMEG, da 20% don BDO.
Nau'in polyester TPU: 4-4 '- diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), adipic acid (AA), tare da MDI lissafin kusan 40%, AA lissafin kusan 35%, da kuma BDO lissafin kudi game da 25%.
Za mu iya ganin cewa albarkatun kasa na nau'in nau'in polyether TPU sashi mai laushi shine polytetrahydrofuran (PTMEG); Kayan albarkatun kasa don nau'in nau'in polyester TPU sassan sarkar taushi shine adipic acid (AA), inda adipic acid ke amsawa tare da butanediol don samar da polybutylene adipate ester azaman sashin sarkar mai taushi.
2. Bambance-bambancen tsari
Sarkar kwayoyin halitta na TPU tana da nau'in nau'in nau'in nau'in nau'in toshe na TPU, inda A shine babban nauyin kwayoyin halitta (1000-6000) polyester ko polyether, B shine gabaɗaya butanediol, kuma tsarin sinadarai tsakanin sassan sarkar AB shine diisocyanate.
Dangane da nau'ikan tsarin A, ana iya raba TPU zuwa nau'in polyester, nau'in polyether, nau'in polycaprolactone, nau'in polycarbonate, da sauransu.
Daga cikin adadi da ke sama, zamu iya ganin sarƙoƙi na gaba ɗaya na polyether TPU da kuma babban sarkar polyeth ko polyoler polyol.
3. Kwatancen aiki
Polyether polyols ne barasa polymers ko oligomers tare da ether bonds da hydroxyl kungiyoyin a karshen kungiyoyin a kan kwayoyin main sarkar tsarin. Saboda ƙarancin ƙarfin haɗin kai na ether bond a cikin tsarinsa da sauƙi na juyawa.
Sabili da haka, TPU polyether yana da kyakkyawan yanayin yanayin zafi, juriya na hydrolysis, juriya na mold, juriya na UV, da dai sauransu. Samfurin yana da kyakkyawar jin daɗin hannu, amma ƙarfin kwasfa da ƙarfin karyewa ba su da kyau.
Ƙungiyoyin ester waɗanda ke da ƙarfin haɗin gwiwa mai ƙarfi a cikin polyester polyols na iya samar da haɗin gwiwar hydrogen tare da sassan sarkar sarka mai wuya, suna aiki azaman wuraren haɗin kai na roba. Duk da haka, polyester yana da wuyar karyewa saboda mamayewar kwayoyin ruwa, kuma acid ɗin da ake samu ta hanyar hydrolysis na iya kara haifar da hydrolysis na polyester.
Sabili da haka, TPU polyester yana da kyawawan kaddarorin inji, juriya ga juriya, juriya mai tsagewa, juriyar lalata sinadarai, juriya mai ƙarfi, da sauƙin sarrafawa, amma juriya na hydrolysis mara kyau.
4. Hanyar tantancewa
Amma abin da TPU ya fi dacewa don amfani, kawai za a iya cewa zaɓin ya kamata ya dogara ne akan bukatun jiki na samfurin. Don cimma kyawawan kayan aikin injiniya, yi amfani da TPU polyester; Idan la'akari da farashi, yawa, da yanayin amfani da samfur, kamar yin samfuran nishaɗin ruwa, TPU polyether ya fi dacewa.
Koyaya, lokacin zabar, ko haɗa nau'ikan TPU guda biyu bazata, ba su da babban bambanci a bayyanar. To ta yaya za mu bambanta su?
Haƙiƙa akwai hanyoyi da yawa, irin su sinadarai masu launi, iskar gas chromatography-mass spectrometry (GCMS), tsakiyar infrared spectroscopy, da sauransu. Duk da haka, waɗannan hanyoyin suna buƙatar manyan buƙatun fasaha kuma suna ɗaukar lokaci mai tsawo.
Shin akwai hanyar ganowa mai sauƙi da sauri? Amsar ita ce e, misali, hanyar kwatanta yawa.
Wannan hanyar tana buƙatar mai gwada yawa kawai. Ɗaukar madaidaicin mita mai yawa na roba a matsayin misali, matakan aunawa sune:
Sanya samfurin a cikin teburin aunawa, nuna nauyin samfurin, kuma danna maɓallin Shigar don tunawa.
Sanya samfurin a cikin ruwa don nuna ƙimar yawa.
Dukkanin tsarin ma'auni yana ɗaukar kusan daƙiƙa 5, sannan ana iya bambanta bisa ga ka'idar cewa yawancin nau'in polyester TPU ya fi na nau'in polyether TPU. Ƙimar ƙayyadaddun ƙayyadaddun ƙima shine: nau'in polyether TPU -1.13-1.18 g / cm3; Polyester TPU -1.18-1.22 g/cm3. Wannan hanyar na iya bambanta da sauri tsakanin nau'in polyester TPU da nau'in polyether.
Lokacin aikawa: Juni-03-2024