Tilmaamaha Naqshadeynta Qaabaynta Polyol Polyester: Laga bilaabo Xulashada Monomer ilaa Habka Isku-darka
Fahmidda Kiimikada Ka Dambeysa Polyol-ka Polyester-ka ee Waxqabadka Sare leh ee Codsiyada Polyurethane
Polyester polyol waa mid ka mid ah walxaha muhiimka ah ee ceeriin ee loo isticmaalo nidaamyada polyurethane (PU), oo ay ku jiraanpolyurethane-ka biyaha ku jira, polyurethane elastomers, dahaarka, dhejiska, maqaar macmal ah, iyo thermoplastic polyurethane (TPU).
Waxqabadka badeecada polyurethane waxaa si weyn u saameeya qaab-dhismeedka molecular-ka iyo sifooyinka polyol-ka polyester-ka. Arrimaha sidaXulashada monomer, nooca kataliyaha, saamiga aalkolada-acid, qiimaha hydroxyl, miisaanka molecular, iyo habka isku-darkadhammaantood waxay go'aamiyaan waxqabadka kama dambaysta ah ee agabka PU.
Maqaalkani wuxuu sharxayaa macquulka naqshadeynta qaabaynta ee polyols-ka polyester-ka, laga bilaabo xulashada walxaha ceeriin ilaa xakamaynta habka wax soo saarka, isagoo ka caawinaya soosaarayaasha polyurethane inay si fiican u fahmaan sida loo sameeyo polyols-ka polyester-ka ee codsiyada kala duwan.
1. Sidee loo Xushaa Asiidhada Dicarboxylic ee loogu talagalay Samaynta Polyester Polyol?
Asiidhyada Dicarboxylic waxay go'aamiyaan qaab-dhismeedka laf-dhabarta aasaasiga ah ee polyol-ka polyester-ka. Xulashada qaybaha aashitada ayaa si toos ah u saameeya:
Doorashada qaab-dhismeedka aashitada saxda ah waa tallaabada ugu horreysa ee naqshadeynta qaab-dhismeedka polyester polyester polyol.
Asiidhyada Udgoonka: Hagaajinta Adkaanta iyo Iska caabinta Kulaylka
Asiidhka Isophthalic (IPA) iyo Asiidhka Terephthalic (PTA)
Asiidhada udgoonka dicarboxylic waxaa inta badan loo isticmaalaa hagaajinta:
Aashitada Terephthalic (PTA)waxay leedahay qaab-dhismeed toosan oo aad u caadi ah iyo u janjeera kicinta xooggan.
Marka PTA ay la falgasho diols silsilad gaaban sida ethylene glycol (EG) ama 1,4-butanediol (BDO), qaab-dhismeedka polyester-ka ee ka dhasha wuxuu muujin karaa dhaqan xooggan oo crystallization ah, taasoo keenta in polyester polyol-ku uu noqdo mid wax ku ool ah ama adag heerkulka qolka.
Tani waxay yareyn kartaa:
- ✖Dabacsanaanta habaynta
- ✖Xasiloonida kaydinta
- ✖Ku habboonaanta codsiga
Sidaa darteed, polyol-yada polyester-ka ee saafiga ah ee ku salaysan PTA si dhif ah ayaa loo isticmaalaa oo keliya qaababka wax ku oolka ah.
Asiidh isophthalic ah (IPA)Waxay leedahay qaab-dhismeed molecular ah oo aan sinnayn sababtoo ah labada kooxood ee carboxyl waxay ku yaalliin booska meta. Tani waxay yareysaa u janjeersiga crystallization waxayna hagaajisaa xasilloonida dareeraha.
Polyol-yada polyester-ka ee ku salaysan IPA guud ahaan waxay bixiyaan:
- ✔Tg Sare
- ✔Hufnaan wanaagsan
- ✔Socod wanaagsan oo la hagaajiyay
Qaabab badan oo warshadeed, IPA waxaa lagu soo bandhigaa iyadoo lala kaashanayo PTA ama asiidhyada aliphatic si loo dheellitiro adkaanta iyo dabacsanaanta.
Asiidhyada Aliphatic: Dabacsanaanta oo sii kordheysa
Aashitada Adipic (AA)
Adipic acid waa mid ka mid ah asiidhyada aliphatic dicarboxylic ee ugu badan ee loo isticmaalo wax soo saarka polyester polyol.
Silsiladdeeda lix-kaarboon ee dabacsan waxay bixisaa:
- •Dabacsanaan heerkul hoose
- •Babac wanaagsan
- •Tg la dhimay
Polyol-yada polyester-ka ee ku salaysan aashitada Adipic badanaa waxay leeyihiin qiimayaal Tg ah oo u dhexeeya qiyaas ahaan.-60°C ilaa -40°C, iyadoo ku xiran qaab-dhismeedka molecular-ka.
Adipic Acid (AA) + 1,4-Butanediol (BDO)
Waxaa si weyn loogu isticmaalaa polyurethane elastomers sababtoo ah:
- AA waxay bixisaa qaybo jilicsan oo dabacsan
- BDO waxay hagaajisaa joogtaynta silsiladaha iyo kicinta jirka
Qaab-dhismeedkani wuxuu gacan ka geystaa:
- •Xoog sare oo la jiidi karo
- •Iska caabin wanaagsan oo xoqan
- •Waxqabadka farsamada ee aadka u fiican
Aashitada Sebacik (SA)
Sebacic acid wuxuu ka kooban yahay silsilad kaarboon oo ka dheer aashitada adipic.
Faa'iidooyinka:
- ✔Dabacsanaan sare
- ✔Waxqabad heerkul hoose oo wanaagsan
- ✔Sifooyinka hydrophobic ee la hagaajiyay
Si kastaba ha ahaatee, sababtoo ah kharashkeeda sare, SA waxaa inta badan loo isticmaalaa codsiyada polyurethane ee waxqabadka sare leh halkaas oo loo baahan yahay iska caabin qabow oo la xoojiyay.
Qaybaha Aashitada Shaqada: Aashitada Dimer iyo Phthalic Anhydride
Asiidh Dimer ah
Dimer acid waxaa ku jira:
- •Silsiladaha molecular-ka ee dheer ee dabacsan
- •Sifooyinka Hydrophobic
- •Dabacsanaan la hagaajiyay
- •Iska caabin hydrolysis oo wanaagsan
Si kastaba ha ahaatee, kordhinta aashitada dimer waxay yareyn kartaa Tg iyo adkaanta. Waxaa badanaa loo tixgeliyaa nidaamyada polyurethane ee u baahan dabacsanaan iyo iska caabin qoyaan.
Phthalic Anhydride (PA)
Phthalic anhydride waa qayb udgoon oo kharash-ool ah oo leh hufnaan falgal oo wanaagsan.
Way hagaajin kartaa:
- ✔Adkaanta
- ✔Adkaanta
- ✔Tartanka kharashka
Si kastaba ha ahaatee, sababtoo ah saamaynta steric, falcelinteeda kooxda terminal-ka ayaa ka hooseysa marka loo eego IPA.
Istaraatiijiyadda Naqshadeynta Aashitada Caadiga ah
Istaraatiijiyad guud oo loogu talagalay qaabaynta polyester polyester polyester waa:
- •Asiidhyada udgoonka: waxay bixiyaan adkaansho iyo xoog
- •Asiidhyada Aliphatic: waxay bixiyaan dabacsanaan iyo adkeysi
Saamiga IPA/AA oo qiyaastii ah 7:3
waxay bixin kartaa qaab-dhismeed dheellitiran oo leh:
- Dhexdhexaad Tg
- Dabacsanaan wanaagsan oo habayn ah
- Sifooyinka farsamada ee xooggan ka dib daaweynta polyurethane
Saamiga saxda ah waa in had iyo jeer la hagaajiyaa iyadoo loo eegayo codsiga bartilmaameedka.
2. Sidee loo Xushaa Diols-ka loogu talagalay Naqshadeynta Polyester Polyol?
Haddii asiidhyada dicarboxylic ay go'aamiyaan laf-dhabarta qaab-dhismeedka, diols-ku waxay u dhaqmaan sidii nidaamiyayaal muhiim ah:
Ethylene Glycol (EG)
Ethylene glycol waa diol-ka ugu fudud ee loo isticmaalo kiimikada polyester-ka.
Sababtoo ah qaab-dhismeedkeeda molecular-ka oo gaaban, EG wuxuu bixiyaa:
- •Joogto silsilad sare ah
- •U janjeera kicinta xooggan
Marka lagu daro PTA, EG waxay samayn kartaa qaab-dhismeedyo kristal ah oo u eg PET, taasoo keeni karta in polyol-yada polyester-ka ay noqdaan kuwo adag heerkulka qolka. Sidaa darteed, polyol-yada polyester-ka ee saafiga ah ee ku salaysan EG waa kuwo aan caadi ahayn.
Qaababka wax ku oolka ah, EG waxaa badanaa lagu daraa:
si loo hagaajiyo crystallinity-ga iyo waxqabadka farsamaynta.
Faa'iido muhiim ah oo EG ah waa:
- ✔Kharash yar
- ✔Helitaanka ballaaran
Soo saarista polyol-ka polyester-ka ee ku salaysan walxaha PET-ka ee dib loo warshadeeyay, EG waxay weli tahay walax ceeriin ah oo muhiim ah.
Diethylene Glycol (DEG)
DEG waxay xidhmooyinka ether ku soo bandhigaysaa silsiladda polyester-ka.
Isku xirka ether-ka dabacsan wuxuu bixiyaa:
- •Tg Hoose
- •Dheecaan la dhimay
- •Waxqabadka socodka oo wanaagsan
Polyol-yada polyester-ka ee ku salaysan DEG ayaa si weyn loo isticmaalaa marka dabacsanaantu muhiim tahay.
Si kastaba ha ahaatee, xidhmooyinka ether waxay yeelan karaan iska caabin hoose oo ku timaadda oksaydhka kulaylka muddada dheer. Sidaa darteed, nidaamyada DEG waxaa badanaa lagu daraa diol xasilloon sida NPG.
Neopentyl Glycol (NPG)
NPG waxay ka kooban tahay qaab-dhismeed kaarboon oo afar geesle ah oo leh laba kooxood oo methyl ah.
Qaab-dhismeedkan gaarka ah wuxuu xaddidaa dhaqdhaqaaqa molecular wuxuuna bixiyaa:
- •Tg Sare
- •Xasillooni kuleyl oo aad u fiican
- •Iska caabinta cimilada sare
- •Iska caabinta hawo-mareenka oo la hagaajiyay
Sababtoo ah adkeysigeeda aadka u wanaagsan, NPG waxaa si weyn loogu isticmaalaa:
- •Dahaarka PU
- •Codsiyada bannaanka
- •Nidaamyada polyurethane ee u adkaysta cimilada
1,4-Butanediol (BDO)
1,4-Butanediol waa mid ka mid ah diol-yada ugu muhiimsan ee loo isticmaalo polyurethane elastomer iyo codsiyada TPU.
Qaab-dhismeedkeeda afar-kaarboon-kaarboon-ku wuxuu bixiyaa:
- •Joogto silsilad wanaagsan
- •Isdhexgal xooggan oo u dhexeeya molekulada iyo unugyada
- •sifooyin farsamo oo heer sare ah
Marka lagu daro asiidhyada udgoonka leh sida PTA, BDO waxay samayn kartaa qaybo kristal ah oo aad u nidaamsan oo la mid ah qaab-dhismeedka PBT.
Tani waxay gacan ka geysaneysaa:
- ✔Awood sare oo la jiido
- ✔Iska caabin xoqid oo ka wanaagsan
- ✔Isku-xidhka jireed ee la hagaajiyay
Si kastaba ha ahaatee, heerka sare ee BDO wuxuu kordhin karaa u janjeersiga crystallization, taasoo keenta in polyester polyols uu noqdo mid dhayal ah ama adag heerkulka qolka.
Si loo hagaajiyo waxqabadka habaynta, BDO waxaa badanaa lagu daraa:
si loo yareeyo kiristaalka xad-dhaafka ah iyadoo la ilaalinayo xoogga farsamada.
Trimethylolpropane (TMP): Soo bandhigida Laan-xakameysan
Trimethylolpropane (TMP) waa khamri badan oo ka kooban saddex kooxood oo hydroxyl ah. Si ka duwan diol-yada caadiga ah, TMP waxay qaab-dhismeedka laamaha u soo bandhigtaa polyol-yada polyester-ka.
Qadar yar oo TMP ah ayaa kordhi kara:
- •Laanqeynta molecular-ka
- •Cufnaanta iskutallaabta
- •Adkaanta polyurethane kama dambaysta ah
TMP waxaa badanaa loo isticmaalaa marka la naqshadeynayo:
- •Dahaarka polyurethane ee waxqabadka sare leh
- •Nidaamyada adag ee PU
- •Horudhacayaasha polyurethane ee laamiga ah
Inta badan qaacidooyinka, waxyaabaha ku jira TMP si taxaddar leh ayaa loo xakameeyaa sababtoo ah laanta xad-dhaafka ah waxay si weyn u kordhin kartaa dheellitirka waxayna yareyn kartaa habka wax-soo-saarka.
3. Sidee loo hagaajiyaa Saamiga Khamriga iyo Aashitada ee Sameynta Polyester Polyol?
Si ka duwan wax soo saarka PET polymer, polyester polyester polyols uma baahna miisaanno molecular oo aad u sarreeya.
Hadafka ugu muhiimsan waa xakamaynta:
Saamiga Xad-dhaafka ah ee Khamriga
Sameynta polyol-ka polyester-ka, qaybaha khamriga waxaa badanaa loo isticmaalaa si xad dhaaf ah si loo gaaro qaab-dhismeedyo hydroxyl-ka ah.
Polyol-ka polyester-ka ee miisaanka yar ee molecular-ka, saamiga xad-dhaafka ah ee khamriga waxaa loo kordhin karaa:1.8–2.0: 1
Qiimaha sare ee hydroxyl wuxuu bixiyaa kooxo hydroxyl oo firfircoon oo loogu talagalay sameynta polyurethane.
Si kastaba ha ahaatee, khamriga xad-dhaafka ah wuxuu yareyn karaa miisaanka molecular wuxuuna si xun u saameyn karaa:
Sidaa darteed, saamiga aalkolada-asiidhka waa in la hagaajiyaa iyadoo loo eegayo codsiga ugu dambeeya ee polyurethane.
Xiriirka ka dhexeeya Saamiga Khamriga iyo Qiimaha Aashitada
Inta lagu jiro sameynta polyol-ka polyester-ka, biyaha la soo saaro si joogto ah ayaa looga saaraa si loo sii wado falcelinta esterification iyo condensation-ka.
Haddii xad-dhaafka khamrigu aanu ku filnayn:
- •Xoogga aashitada ayaa weli sarreeya
- •Falcelintu way gaabinaysaa
- •Qiimaha aashitada kama dambaysta ah way adkaanaysaa in la dhimo
Qiimo aashito oo hooseeya ayaa muhiim ah sababtoo ah aashitada haraaga ah waxay saameyn kartaa falcelinta polyurethane. Marka polyol polyol uu la falgalo isocyanates, qoyaanka haraaga ah iyo qaybaha aashitada ayaa laga yaabaa inay gacan ka geystaan:
Codsiyada badan ee polyurethane, xakamaynta qiimaha aashitada hoos ku qoran:1 mg KOH/gwaa bartilmaameed tayo muhiim ah.
4. Sida Loo XushoKatalystayaashaSoo saarista Polyester Polyol?
Catalysts-ku waxay door muhiim ah ka ciyaaraan xakamaynta:
Tetrabutyl Titanate (TBT)
Tetrabutyl titanate waxaa si weyn loo isticmaalaa sababtoo ah:
- ✔Firfircooni sare leh
- ✔Heerka sifeynta degdegga ah
- ✔Kharashka tartanka
Si kastaba ha ahaatee, isku-dhafka titanium-ka ee haray ayaa laga yaabaa inuu dedejiyo hydrolysis-ka isku-xidhka ester-ka, kaas oo noqon kara walaac ku saabsan nidaamyada polyurethane ee xasaasiga u ah qoyaanka.
Oxide Tin Butyl (BTO)
Butyl tin oxide waxay leedahay faa'iidooyin:
- ✔Waxqabadka esterification ee wax ku oolka ah
- ✔Iska caabin hydrolysis oo wanaagsan
- ✔Xasilloonida muddada dheer oo la hagaajiyay
Codsiyada sida polyurethane-ka biyaha ku jira, halkaas oo iska caabbinta hydrolysis-ku ay si gaar ah muhiim u tahay, nidaamyada kicinta ee ku salaysan BTO ayaa badanaa la door bidaa.
Xulashada u dhaxaysa TBT iyo BTO waxay ku xiran tahay:
5. Xakamaynta Habka Wax Soo Saarka Polyester Polyol
Habka isku-darka ayaa si toos ah u saameeya tayada kama dambaysta ah ee polyester polyester polyols.
Marxaladaha ugu muhiimsan waxaa ka mid ah:
- Tixgelinta
- Polycondensation
- Qiimaha hydroxyl iyo hagaajinta qiimaha aashitada
Tallaabada 1aad: Marxaladda Esterification
Inta lagu jiro marxaladda esterification, walxaha soo socda ayaa lagu dallacaa fal-galiyaha:
Falcelintu waxay badanaa bilaabataa qiyaastii:180°C
Biyaha ka soo baxa esterification-ka waxaa laga saaraa:
- •Xayiraadda Nitrogen-ka
- •Nidaamyada kondenserka
Horumarka falcelinta waxaa lala socon karaa iyada oo loo marayo:
- •Qadarka ururinta biyaha
- •Tijaabinta qiimaha aashitada
Tallaabada 2: Marxaladda Polycondensation
Ka dib marka la nadiifiyo, nidaamku wuxuu galaa marxaladda polycondensation.
Xaaladaha caadiga ah:
- •Heerkulka:200–220°C
- •Cadaadis la dhimay: hawlgalka faakuumka
Faakuumka ayaa ka caawiya ka saarista biyaha haray iyo khamriga xad-dhaafka ah, taasoo horseedaysa koritaanka molecular-ka.
Si kastaba ha ahaatee, heerkulka xad-dhaafka ah ama waqtiga falcelinta ee dheer wuxuu sababi karaa falcelin dhinaca ah, kordhinta midabka, iyo burburka polymer-ka. Sidaa darteed, xaaladaha habka waa in si taxaddar leh loo xakameeyaa.
Tallaabada 3: Xakamaynta Barta Dhammaadka
Si ka duwan polymerization-ka PET, wax soo saarka polyester polyol uma baahna horumarinta miisaanka molecular-ka oo aad u sarreeya. Tilmaamaha tayada ugu muhiimsan waa:
Qiimaha Haydroxyl
Waxay go'aamisaa dhaqdhaqaaqa falgalka polyurethane iyo saamiga isocyanate ee loo baahan yahay.
Qiimaha Aashitada
Waxay muujinaysaa dhammaystirka falcelinta iyo waxa ku jira aashitada haray.
Bartilmaameed warshadeed oo guud:Qiimaha aashitada <1 mg KOH/gka hor inta aan la saarin isbitaalka.
Nadiifin la'aanta ku filan ee vacuum-ka waa mid ka mid ah sababaha ugu waaweyn ee keena:
- ✖Qoyaan badan oo haraaga ah
- ✖Qiimaha aashitada sare
- ✖Waxqabadka liita ee polyurethane
6. Soo Koobidda Naqshadeynta Polyol Polyester
| Qodobka Naqshadeynta | Doorsoomayaasha Muhiimka ah | Mabda'a Xulashada | Baaxadda Caadiga ah |
|---|---|---|---|
| Adkaanta laf-dhabarta | IPA, PTA, AA, SA | Asiidhyada udgoonku waxay hagaajiyaan adkaanta; asiidhyada aliphatic waxay hagaajiyaan dabacsanaanta | IPA/AA ≈ 7:3 |
| Hagaajinta Tg | EG, DEG, NPG, BDO | EG waxay kordhisaa bilicda; DEG waxay yareysaa daxalka; NPG waxay hagaajisaa cimri dhererka; BDO waxay hagaajisaa xoogga | Iyada oo ku saleysan codsiga |
| Xakamaynta miisaanka molecular-ka | Saamiga aalkolada-iyo-acid | Xad-dhaafka khamriga wuxuu abuuraa qaab-dhismeedyo la joojiyay hydroxyl | Aalkolo/Asiidh = 1.3 |
| Xulashada Kataliska | TBT iyo BTO | TBT si loogu helo falcelin degdeg ah; BTO si loo helo xasillooni hydrolysis oo wanaagsan | BTO 0.2–0.5‰ |
| Xakamaynta laamaha | TMP/Glycerol | Ku darista yaryar waxay hagaajisaa cufnaanta iskutallaabta | TMP ≤3 mol% |
7. Sidee Naqshadeynta Polyester Polyol u Saameysaa Waxqabadka Polyurethane?
Naqshadeynta polyester polyols waa inay had iyo jeer ka bilaabataa codsiga ugu dambeeya ee polyurethane.
| Codsiga | Naqshadeynta Polyester Polyol ee lagu taliyay |
|---|---|
| Xabagta PU | Polyols polyester ah oo ku salaysan AA dabacsan oo loogu talagalay dhejis adag iyo adkeysi |
| Dahaadhka PU | Nidaamyada IPA/NPG ee adkaanta iyo iska caabbinta cimilada |
| Elastomers-ka TPU | Nidaamyada AA + BDO ee xoogga farsamada iyo iska caabbinta xoqidda |
| Biyaha PU | Polyol-yada polyester-ka ee u adkaysta hydrolysis-ka oo leh nidaamyo kiciyayaal la hagaajiyay |
| Maqaar Macmal ah | Polyols-ka polyester-ka ee dabacsan oo leh jilicsanaan la xakameeyey |
Gunaanad: Naqshadeynta Polyester Polyol waxay u baahan tahay xakamaynta qaab-dhismeedka Molecular
Polyol-yada polyester-ka ee waxqabadka sare leh laguma sameeyo isku darka walxaha ceeriin ah. Waxay u baahan yihiin naqshad nidaamsan oo ku salaysan:
Adigoo si taxaddar leh u xakameynaya:
Soosaarayaashu waxay horumarin karaan polyols polyester ah oo leh sifooyin la hagaajiyay oo loogu talagalay codsiyada kala duwan ee polyurethane.
Soo-saareyaasha polyurethane, xulashada agabka ceeriin ee saxda ah iyo nidaamka kicinta ayaa lagama maarmaan u ah helitaanka waxqabadka habaynta oo wanaagsan, xasilloonida badeecada, iyo sifooyinka ugu dambeeya ee agabka.
MOFAN waxay bixisaa xalal iyo takhasus gaar ah oo kaaliyayaasha polyurethane ahwaxyaabaha ceeriin ah ee polyurethaneloogu talagalay in lagu taageero codsiyada kala duwan ee PU, oo ay ku jiraan dahaarka, dhejiska, elastomers, iyo nidaamyada kale ee polyurethane ee horumarsan.
La xiriir MOFANtaageerada qaabaynta polyurethane ee xirfadeysan iyo xalalka loo habeeyey.
Waqtiga boostada: Agoosto-07-2026