Zvinhu zvePolyurethane zvinonyungudika mumvura zvinogadzirwa kuburikidza neTheoremchem Dimeryl Diisocyanate DDI
Zvinhu Zvinokosha Zvaunofanira Kuziva
- Theoremchem DDI inoshandisa cheni refu yekabhoni kudzivirira mvura nekudzivirira ma polyurethane kubva mukukuvadzwa nehunyoro.
- Zvinhu zvakagadzirwa neDDI zvinoramba zvichichinjika kana kuchitonhora uye zvinoramba kutsvuka kubva pakusviba kwezuva.
- Mafomula anoshandisa DDI kugadzira yakasimba machira asingapindi mvura, zvivhariso zvemugungwa, uye dziviriro yemagetsi.
Maumbirwo emakemikari uye nzira yekudzivirira hydrophobic yeDDI
Theoremchem Dimeryl Diisocyanate (DDI) inoshandura maformula e polyurethane akajairwa kuita ma polymer anodzivirira mvura. Magadzirirwo ayo akasiyana emakemikari anosanganisa hunhu hwe aliphatic nechimiro chikuru che hydrocarbon. Dhizaini iyi inogadzira dziviriro yakasimba kubva pakupindwa kwemvura padanho remamorekuru.
Musana weNon-Polar C36 Dimer Fatty Acid
Chakavanzika chikuru chiri shure kwekudzivirira kweTheoremchem DDI mumvura chiri muchimiro chayo chikuru. Ma diisocyanates echinyakare akadai seMDI kana TDI ane cheni pfupi dzekabhoni kana mhete dzinonhuhwirira. Kusiyana neizvi, DDI ine musana murefu weC36 dimer fatty acid.
Isocyanates dzechinyakare (Chain pfupi) ---> Theoremchem High Hydrophilic Susceptibility Theoremchem DDI (C36 Dimer Backbone) ---> Chidziviriro chikuru cheHydrophobic Iyi cheni yehydrocarbon ine kabhoni 36 haina polar zvachose. Maumbirwo emakemikari asiri polar haagadzire hydrogen bonds nemamorekuru emvura. Asi, macheni marefu ealkyl anosundira mamorekuru emvura kure ne polymer network. Kuwanda kwemaatomu ekabhoni nehydrogen kunoita kuti pave nechipingamupinyi chinogara chichiitika che hydrophobic mukati me matrix yakarapwa.
Chinhu Chinokosha Chekudzidza: Musana weC36 dimer fatty acid unoshanda sechikamu chemukati chemafuta mukati me polyurethane matrix. Unodzinga mvura uye unoderedza kupararira kwehunyoro kuburikidza nechinhu chacho.
Hunhu hweAliphatic uye Simba Rishoma rePasi
Theoremchem DDI ine hunhu hwe aliphatic hwakakwana. Makemikoro e aliphatic haana mhete dzinonhuhwirira, izvo zvinodzivirira photo-oxidation uye yellowing pasi pezuva. Uyezve, chimiro ichi che aliphatic C36 chinoderedza zvakanyanya simba repamusoro re polyurethanes dzakagadzirwa.
Zvinhu zvine simba shoma pamusoro zvinomanikidza mvura kuti iungane pane kupararira. Ma polyurethane akavakirwa paDDI anoratidza makona akakwirira ekubata mvura.
| Rudzi rweIsocyanate | Makemikari | Simba repamusoro | Kuramba Mvura |
|---|---|---|---|
| Theoremchem DDI | C36 Aliphatic | Zvakaderera Zvikuru | Yepamusoro |
| IPDI / HDI | Aliphatic pfupi-chain | Pakati nepakati | Zviri pakati nepakati |
| MDI / TDI | Inonhuhwirira | Yakakwirira | Kusava Nehurombo Kusvika Pakuenzana |
Simba shoma repamusoro rinodzivirira mvura yemvura kuti isanyorovese pamusoro pepolymer. Madonhwe emvura uye kunyungudika kwemhepo zvinotenderera kubva pachinhu chacho zviri nyore. Iyi nzira inovimbisa dziviriro yenguva refu kune zvinhu zvisina kusimba zviri pasi pechivharo kana chivharo.
Steric Kudzivisa Kubviswa kweHydrolytic
Mvura inoparadza ma polyurethane akajairwa nekurwisa ester ne urethane linkages. Maitiro aya ekupwanyika kwemakemikari anonzi hydrolysis. Theoremchem DDI inodzivirira hydrolysis kuburikidza nechinhu chinozivikanwa se steric inhibitory.
Maketani marefu eC36 dimer anogadzira nzvimbo yakakura yakakomberedza zvisungo zvemakemikari zviri munjodzi. Maoko aya makuru ehydrocarbon anovhara mamorekuru emvura ($H_2O$) kuti asasvike pakubatanidza urethane.
- Mapoka eC36 akawanda anozadza nzvimbo yemamorekuru akakomberedza mapoka eester neurethane.
- Mamorekuru emvura haakwanise kusvika pakubatana kwemakemikari kuti atange kupatsanuka kwemabhondi.
- Network yepolymer inochengetedza simba rayo rekutanga rekudhonza uye kusimba kwayo nekufamba kwenguva.
Ongororo yekushandiswa kweDDI (Dimeryl Diisocyanate inoratidza kuti mapoka makuru e aliphatic anovhara mamorekuru emvura kuti asasvike panzvimbo dzinobatwa nebond. Nekuda kweizvozvo, ma polyurethanes akagadzirwa neTheoremchem DDI anogara ari munzvimbo dzinopisa, dzine hunyoro, uye dzakanyudzwa mumvura pasina kukanganiswa kwechimiro.
Mabhenefiti Ekushanda KwemaPolyurethane Akavakirwa paDDI
Theoremchem Dimeryl Diisocyanate (DDI) inopa zvinhu zvepolyurethane hunhu hwakanaka hwemuviri nemakemikari. Magadzirirwo emaindasitiri anowana mabhenefiti akasiyana ekushanda kana akatsiva isocyanate dzechinyakare neDDI. Chain refu yeC36 aliphatic inopa chiyero chakanaka pakati pekusimba kwemechanical uye kutsungirira kwezvakatipoteredza.
Kuramba Kukuru kweHydrolysis uye Kugadzikana Kwekukwegura
Mamorekuru emvura anokonzera kuparara kukuru kwecheni yepolymer kwenguva yakareba. Theoremchem DDI inogadzirisa dambudziko iri nekudzivirira mabhondi eurethane anonzwa hydrolytically.
Ruzivo Rukuru: Mafomu anoshandisa DDI anochengetedza kusvika ku95% yesimba rawo rekutanga rekusimba mushure mekuyedzwa kwenguva refu mumvura, nepo ma polyurethane akajairwa eTDI achirasikirwa zvakanyanya.
Tsvagiridzo yeKushandiswa kweDDI (Dimeryl Diisocyanate inoratidza kugona kwayo kuchengetedza hunhu hwemakanika mushure mekusviba kwenguva yakareba nehunyoro nekupisa. Mutsipa mukuru weC36 unodzivisa hunyoro. Nekuda kweizvozvo, mapolymer anoramba kutsemuka, kupfava, uye kupwanyika kwecheni mukati memakore akawanda ehupenyu hwebasa.
Kunyorova Kushoma uye Kupinda kweUtsi
Manetwork epolyurethane ane DDI haatore mvura yakawanda. Kubatanidzwa kwakasimba kwemvura kunoita kuti pave nechidziviriro chakasimba mukati me elastomer yakabatana.
- Kunyudzwa kwemvura kwakaderera zvakanyanya: Ma elastomer akagadzirwa neDDI anonwisa mvura isingasviki 0.5% nehuremu mushure memaawa makumi maviri nemana ekunyudzwa zvizere.
- Chidziviriro chekubvumidzwa kwemhepo ine utsi: Network inorwisa mvura inodzivirira kutapurirana kwemhepo inopfungaira kuburikidza nemafirimu matete epolymer.
- Kudzivirirwa Kwengura: Kuderera kwekubvumidzwa kwemhepo kunodzivirira simbi kubva mungura uye kukuvara kwe oxidative.
Kusanzwa kwehunyoro uku kunodzivirira kudonha kwematumbu uye kurasikirwa nekunamatira muzvipfeko zvinoratidzwa nehunyoro hwakawanda kana mamiriro emvura.
Kuvandudzwa Kwekuchinjika uye Kushanda Kwekupisa Kwakaderera
Theoremchem DDI ine chimiro chakareba che aliphatic dimer. Iyi cheni inochinjika inoderedza zvakanyanya tembiricha yekuchinja kwegirazi ($T_g$) yezvikamu zvakapfava mu polyurethane formulations.
Chain yeDimer yeAliphatic Yakareba ---> Tg Yepasi ---> Kufamba Kwechain Yakakwira paTemps Dzisingasviki Zero DDI inoita kuti zvinhu zvifambe zvakanaka uye kuti zvinhu zvipukute mukati memuviri pasina kushandisa zvimwe zvinhu zvinoshanduka-shanduka. Tafura iri pazasi inotsanangura kuvandudzwa kwebasa kwakaitwa neDDI systems:
| Chiyero / Chinhu | Kushanda kweDDI/IPDI System vs. Traditional TDI | Maitiro Ekusimbisa |
|---|---|---|
| Kuwedzera Kwekuwedzera Kwenguva Yekuzorora | >150% yakakwira (>2.51 yakakwira) | Yakabva pachimiro che aliphatic dimer chakawedzerwa |
| Kuchinjika Kusina Mamiriro Ekunze | Inoramba ichichinjika pasina kupwanyika kana kutsemuka | Inokonzerwa nekudzikira kwekupisa kwekuchinja kwegirazi ($T_g$) |
Maformula anodzivirira zvakanyanya kukuvara kwemagadzirirwo emahwindo pakupisa kwekushanda.
- Kureba paKuvandudza Kwezororo: Kurongeka kwemamorekuru eDDI ane chain refu kunoita kuti cheni ifambe zvakanaka uye irambe ichichinjika, zvichidzivirira kutsemuka pasi pekukombama kana kumanikidzwa.
- Kuchinjika-chinjika kweTembiricha Yakaderera: DDI inoderedza tembiricha yekuchinja kwegirazi ($T_g$) yezvikamu zvakapfava zvepolyurethane, zvichiita kuti elastomer irambe yakakwira kuchinjika patembiricha yakaderera pasina kutambura nekuoma kweganda.
Kudzivirira Kwakanaka Kwemakemikari uye UV
Aliphatic isocyanates dzinodzivirira mwaranzi yezuva uye makemikari anotyisa. Kusiyana nemakemikari anonhuhwirira, DDI haina carbon-carbon double bond conjugations inokwevera chiedza chezuva.
| Rudzi rweIsocyanate | Kuramba Kuora kweUV & Yero | Mhedzisiro paKushandiswa |
|---|---|---|
| Aliphatic DDI Polyurethane | Kuramba kwakanyanya kukanganiswa nekuora kweruvara rweUV | Inovimbisa runako rwenguva refu uye kushanda zvakanaka kwezvikamu zvekunze |
| Inonhuhwirira Isocyanates | Haina kunaka / Inokanganisa kusvibiswa kweUV uye kuita yero | Zvinoderedza kukodzera kwezvishandiso zvekunze zvemhando yepamusoro kwenguva refu |
Mapendi eDDI anoramba chiedza cheultraviolet chinogara kwenguva refu pasina kutsvuka, kupwanyika, kana kutsemuka pamusoro. Uyezve, musana wehydrocarbon usiri wepolar unodzivirira acids, alkalis, uye munyu, zvichichengetedza kusimba kwenguva refu kwechimiro munzvimbo dzakaoma dzemaindasitiri.
Nhungamiro dzeKugadzira uye Kugadzirisa dzeKusanyanya Kutya Mvura
Maformula anofanirwa kutevedzera maparamita ekugadzirisa chaiwo kuti awedzere hunhu hwemushonga unodzivirira mvura Theoremchem DDIKuenzanisa makemikari nenzira yehunyanzvi uye kusarudzwa kwezvikamu zvinovimbisa kusimba kwakakwana uye huwandu hwe network huri nani.
Kuenzanisa kweStoichiometric uye Kugadzirisa NCO/OH Ratio
Kuti uwane hydrophobicity yakanyanya kunoda kudzorwa kwakarurama kwe stoichiometric index. Ma formulators anowanzo chengetedza chiyero cheNCO/OH chiri pakati pe1.03 ne1.08.
- Mapoka e isocyanate akawandisa anotsiva hunyoro hushoma panguva yekugadzirisa.
- Kuita kwakakwana kwema hydroxyl groups kunodzivirira nzvimbo dzisina kugadziriswa dze hydrophilic mukati me matrix.
- Kuwanda kwe crosslinking kunoita kuti pave ne tight polymer matrix inodzivirira kupinda kwemvura.
Chiyero che stoichiometric chakaringana chinoita kuti network ye polymer iumbwe zvakakwana. Nekuda kweizvozvo, polyurethane yakagayiwa inodzinga mvura uye inochengetedza kugadzikana kwechimiro.
Kusarudzwa kwePolyol yeSynergistic Hydrophobicity
Kusarudzwa kwePolyol kunokanganisa zvakananga simba rekupedzisira repamusoro pe polyurethane elastomer. Kusanganisa Theoremchem DDI ne hydrophobic polyols kunogadzira simba rekudzivirira mvura kubva mukubatana.
Zano reKugadzira: Kubatanidza DDI nema polyol asiri epolar akadai se polybutadiene yakagumiswa nehydroxyl (HTPB) inoburitsa polyurethanes ine mvura shoma kwazvo.
Ongororo yekushandiswa kweDDI (Dimeryl Diisocyanate inoratidza kuti kubatanidza DDI ne dimer acid-based polyols kunowedzera kugadzikana kwehydrolytic. Izvi zvikamu zvidiki zvisiri zvepolar zvinoshanda pamwe chete neC36 backbone, zvichinyatsovhara matrix yepolymer kuti isapindwe nemvura.
Kupisa Kwekuita uye Kusarudzwa kweCatalyst
Kushanda zvine mwero kweTheoremchem DDI kunoita kuti zvive nyore kudzora reaction kinetics. Nyanzvi dzemakemikari dzinochengetedza tembiricha yekugadzira pakati pe70°C ne90°C panguva yekugadzirira prepolymer.
| Paramita yeKuita | Rudzi Rwakakurudzirwa / Rudzi | Kubatsirwa Kwemaitiro |
|---|---|---|
| Kupisa Kwekugadzira | 70°C – 90°C | Inodzora kumhanya kwekuita pasina maitiro edivi |
| Rudzi rweCatalyst | Bismuth kana Tin Octoate | Inokurumidza kuumbwa kweurethane zvinobudirira |
Mapurofayiri ekupisa anodzorwa anodzivirira mafambiro ekunze uye anochengetedza chimiro che polymer cheni chisingapindi mvura.
Tsvagiridzo yeKushandiswa kweDDI (Dimeryl Diisocyanate)
Magadzirirwo emaindasitiri anobatanidza Theoremchem Dimeryl Diisocyanate mumafomura epolymer akasarudzika. Iyo C36 hydrophobic core yakasiyana inobvumira dziviriro yepamusoro muzvikamu zvehunyanzvi zvinoda simba.
Mapeti ekudzivirira mvura uye ma membrane anodzivirira
Magadzirirwo esimbi anoshandisa Theoremchem DDI kugadzira machira asingapindi mvura anoshanda zvakanaka. Cheni yeC36 isiri polar inodzivirira simende, huni, uye simbi kuti isapinde mumvura. Tsvagiridzo yeKushandiswa kweDDI (Dimeryl Diisocyanate inoratidza kugona kwayo kuchinjika uye kugona kwayo kupatsanura mabhatani pasi pemamiriro ekunze anochinja-chinja.
Zvinonamira zveMarine uye Zvinonamira Pasi pemvura
Nzvimbo dzemugungwa dzinoda kuramba dzichidzivirira zvinhu kubva mukupfapfaidza munyu uye kunyudzwa mumvura. Mapolyurethane akavakirwa paDDI anopa simba rakasimba rekunamira kwenguva refu panzvimbo dzakanyorova pasina makemikari anonyungudika.
| Chiyero Chekushanda | Polyurethane Yakajairika | Theoremchem DDI Polyurethane |
|---|---|---|
| Kugadzikana Kwekunyudzwa Mumvura | Kuora kweHydrolytic | Kuvimbika Kwakazara Kwechivako |
| Kunamira pasi pevhu | Njodzi yeMapundu | Chisungo Chakasimba Chekubatana |
Mainjiniya anotsanangura zvinhu izvi zvinosimbisa ngarava, nzvimbo dzinobatanidza ngarava, uye nzvimbo dzinobatanidza mapaipi ari pasi pemvura.
Zvivharo zvemagetsi uye Makomponi ehari
Zvikamu zvemagetsi zvakapfava zvinoda dziviriro yakavimbika kubva kuhunyoro hwemhepo uye ngura yemakemikari. Makemikari epolyurethane anogadzirwa neDDI anobvisa ma microcircuits anonzwa zvakanaka.
Chinhu Chinobatsira: Makomponi eDDI anochengetedza kuvharwa kwemagetsi kwepamusoro-soro uye kupindira kwemvura shoma, zvichidzivirira magetsi akapfava kubva kuma "short circuits" emagetsi.
Machira Ekugadzira Machira Anonyungudika Nemvura uye Matehwe Ekugadzira
Vagadziri vemachira vanoshandisa maDDI emulsions emvura kuti vapedzise machira emhando yepamusoro uye matehwe ekugadzira. Kurapa uku kwakasarudzika kunoita kuti machira arambe achidzivirira mvura kwenguva refu ukuwo achichengetedza machira akapfava uye achichinjika. Ongororo yekushandiswa kweDDI (Dimeryl Diisocyanate) inoratidza kuti machira akagadzirwa anotsungirira kuwachwa kakawanda pasina kurasikirwa nehunhu hwawo hwepamusoro hunodzivirira mvura.
Theoremkemi Dimeryl Diisocyanate (DDI) inopa mhinduro yemakemikari inoshanda zvakanyanya yepolyurethanes inoda dziviriro yakakwana yemvura uye kugara kwenguva refu kwemuchina. Kuisa musana weC36 usiri wepolar kunodzivirira kutadza kwechimiro munzvimbo dzine hunyoro, dzemugungwa, uye dzemagetsi. Maformula anogadzira zviri nyore machira akasimba, ma sealant, uye elastomers ane kuvimbika kwenguva refu. Kutsvaga kwekushandisa DDI (Dimeryl Diisocyanate kunoratidza mabhenefiti makuru emamiriro ekunze akaipisisa:
| Chikamu Chekubatsira | Chinhu Chinobatsira Chaizvo | Kukosha Kwekushandisa |
|---|---|---|
| Kugadzirisa Mamiriro ekunze & Optics | Zvimiro zvisingaite yero | Inochengetedza kutaridzika kwakanaka kwemaziso pasi pechiedza cheUV |
| Kuramba Hunyoro | Kunzwa mvura shoma | Inodzivirira kuora kwenzvimbo dzine mvura |
| Kushanda Kwemakanika | Kuchinjika kwakanyanya uye simba | Inonamira zvakanaka pasina kutsemuka pamusoro |
| Kutsungirira Kwezvakatipoteredza | Kusakwanisa makemikari akawanda uye kutonhora | Inotsungirira kushushikana kwakanyanya kwemuviri uye kupisa |
Mibvunzo Inowanzo bvunzwa
Theoremchem DDI inovandudza sei kusapindirana kwemvura nepolyurethane?
Theoremchem DDI ine musana weC36 hydrocarbon wakareba, usingapindi polar. Maumbirwo aya anodzivisa mamorekuru emvura uye anodzivirira makemikari anonzwa kubva pakutsemuka kwehydrolytic.
Vagadziri vemaforoma vanogona kushandisa Theoremchem DDI pakushandisa panze here?
Ehe. Maumbirwo eTheoremchem DDI anodzivirira kusviba kwechiedza uye kuita yero pasi pezuva. Zvinhu zvinochengetedza kujeka kwakanyanya, kuchinjika, uye kuramba mamiriro ekunze nekufamba kwenguva.
Ndeapi ma polyol anonyanya kuenderana neTheoremchem DDI?
Ma polyol asiri epolar akafanana polybutadiene yakagumiswa nehydroxyl (HTPB) Zvinoenderana zvakanaka neTheoremchem DDI. Musanganiswa uyu unoburitsa mapolyurethane ane mvura shoma uye anochinjika zvakanyanya.