Muri shimi ya polimeri, polyols zihariye zikora nk'ingenzi. Amatsinda ya Hydroxyl agirana na isocyanates kugira ngo akore imiyoboro ikomeye ya urethane. MOFAN ikora uruhererekane rwa polyether rwa tekiniki na polyethylene glycols nziza (PEG) ku nganda. Injeniyeri za shimi zikoresha ibi bice mu gukingira ibintu bikomeye, ifuro rihindagurika, na polyurethane elastomers.

Uku kwiyongera kw'ubukungu bw'ibigo by'inganda mu nganda kurerekana urwego rw'ubukungu bw'ibigo by'inganda mu nganda.

Ibintu by'ingenzi byakunzwe

• Polyol zidasanzwekora urethane ikomeye ihuza na isocyanates kugira ngo ukore polyurethanes nziza cyane.
• Polyol za polyether zirwanya kwangirika kw'amazi kurusha polyester polyols mu bidukikije bitose.
• Polyol zifite imikorere myiza zongerera ubucucike bw'ibikoresho kugira ngo zongere ubukana n'ubushyuhe.
• Diols zifite uburemere bwinshi zigabanya umubare wa urethane kugira ngo zikomeze guhindagurika ku bushyuhe buri munsi ya zeru.
• Polyols zihumura neza zitanga ubushobozi bwo kwirinda ubushyuhe bwinshi no kudakoresha umuriro ku bikoresho bikomeye bikingira ubushyuhe.
• Polyethylene glycols nziza itanga amavuta yoroshye kandi igenzura imiterere y’ibinyabutabire mu nganda zitandukanye zitunganya.
• Ubwinshi bwa potasiyumu mu bikoresho fatizo buratuma habaho ingaruka mbi z’imiti mu gihe cy’ikorwa ry’uruganda.

Gusobanukirwa Polyol zidasanzwe mu butabire bw'inganda

Imiterere ya shimi ya Polyether na PEG Polymers

Igishushanyo mbonera cy'abahanga mu bya shimi mu by'ikoranabuhanga rya polymerpolyol zidasanzwekugira ngo hubakwe ibikoresho byizewe kandi biramba. Imiterere ya molekile ishingiye ku gusubiramo kwa eteri itanga ubushobozi bwo kwihangana no gukomera. Ibikoresho bitangira gukora reactions hamwe na eteri zizunguruka birema imiyoboro itandukanye yagenewe imiterere y’inganda.

Guhitamo hagati ya polyether polyols na polyester polyols bihindura cyane ubudahangarwa bw'umugongo. Imiterere ya polyether itanga ubudahangarwa bwiza ku gucika kw'amazi mu buryo bushyushye. Ku rundi ruhande, isano ya ester muri polyester polyols itanga ubudahangarwa bwinshi bwo kwangirika. MOFAN itanga polyols zikora neza zihuza ubudahangarwa bw'ibinyabutabire n'uburyo bwo gutunganya neza.

Uruhare rwa Polyols muri sisitemu ya Polyurethane

Guhuza polyurethane ifite imikorere myiza biterwa no kongeramo amatsinda ya hydroxyl akorana na stoichiometric mu buryo bwa stoichiometric mu bintu bikora neza. Igisubizo cy'ibanze kibaho iyo itsinda rya hydroxyl rihuye na molekile ya isocyanate. Iyi ntambwe ikora isano ikomeye ya urethane ku muyoboro wa polymer ukura.

itsinda rya hydroxyl + isocyanate -> isano ya urethane

Imashini zikora ifuru zihuza polyol zitandukanye n'ubwoko bwihariye bwa isocyanate kugira ngo zigenzure ubucucike bw'ifuro, ubukana bwa polymer, no kudakoresha ubushyuhe. Imvange z'amazi zivanze zisaba igipimo cy'imikorere iboneye kugira ngo hirindwe ko gelling itangira vuba mu gihe cyo kuyitunganya. Kongeramo inyongera zihuza bihutisha gahunda yo kuyitunganya no kunoza ubukana bwa nyuma. MOFAN itanga amanota yihariye ya tekiniki atuma itunganywa neza mu bikoresho byikora.

Ishyirwa mu byiciro ry'imikorere hakurikijwe uburemere bwa molekile n'umubare wa Hydroxyl

Agaciro ka Hydroxyl ni ko kayobora ubucucike bw'imiyoboro ya thermoset ivuwe. Inyongeramusaruro nke zifite umubare munini wa hydroxyl, bigatuma habaho ibice bikomeye bya polymer bifite ubucucike bukomeye bwa crosslink. Diols zifite uburemere bwinshi bwa molecule zifite umubare muto wa hydroxyl, bigatuma ibice byoroshye bya elastomeric bikwiranye n'ibifunga.

Guhitamo imibare ikwiye ya hydroxyl bituma abahanga mu by’imashini bahindura uburyo bworoshye bwo gukora no gukurura neza. Ubwinshi bw’ibipimo bya molekile bugabanya ubwinshi bw’ibice bya urethane muri matrix. Ubwinshi bw’ibipimo bya molekile buke byongera ingano ikomeye y’ibice, byongera ubudahangarwa bw’ubushyuhe n’ubushobozi bwo gukanda. MOFAN ikora polyols za tekiniki mu buremere bwa molekile bunini kugira ngo ihuze n’ibisabwa mu nganda.

Ubwoko bw'ingenzi n'imiterere ifatika y'imiti ya polyether

Polyol zidasanzwe zitanga uburyo bwo gutunganya ibintu mu buryo bwihariye kandi zigakomeza igihe kirekire mu bikorwa by'ubutabire mu nganda.Polyol za polyetherIfite isano ya ogisijeni mu minyururu yazo ya molekile. Izi nyururu za eteri zitanga ubusugire bwiza bwa hydrolytic mu bidukikije bitose. Inzobere mu bya shimi zikunze kugereranya izi sisitemu na polyester polyols. Nubwo polyester polyols zitanga ubusugire bukomeye bw'umubiri, polyester polyols ntizigira ubusugire bungana bwa hydrolytic. Polyester polyols zigabanuka vuba iyo zihuye n'ubushuhe buhoraho. MOFAN ikora imiterere yihariye yo kurinda ibice bihindagurika kwangirika kw'amazi no kwangirika gukabije kwa shimi.

Imikorere myiza ya Crosslinks na Diols z'imiterere

Imiterere ya polimeri ishingira ku miterere ya mbere ya molekile kugira ngo igere ku miterere yihariye ya mekanike. Uduhurizo tw’imikorere ikomeye twubaka imiyoboro minini y’ibice bitatu, mu gihe dioli z’imiterere zikora iminyururu ya polimeri yagutse.

Ingufu zo Guhuza no Kongera Ubufatanye mu Mikino

Udukingirizo tw’urukiramende dufite imikorere myiza twongera umubare w’ahantu hakora hydroxyl kuri buri molekyuli. Imikorere ya Hydroxyl iri hagati ya 2.0 na 4.0 yongera ubucucike bw’urukiramende mu gihe cyo gupima. Ubucucike bwinshi bw’urukiramende butuma imbaraga zifatanye, ubukana bw’umubiri, n’imiterere rusange ya mekanike. MOFAN itanga PF-040, PF-450, na PF-1050 kugira ngo yongere uburyo bwo guhuza matrix. Izi nyongeramusaruro zongerera ubushyuhe ubushobozi bwo kwirinda mu bice bibiri by’urukiramende, mu byuma bicukurwa, no mu bipfundikizo birinda hasi.

Diols zo mu burebure buhanitse kuri sisitemu zo mu rwego rwo hasi

Gukoresha modulus nke bisaba polimeri zigororotse zifite uburemere bwinshi bwa molekile. Dioli zifite uburemere bwinshi bwa molekile nka MOFAN PF-2080 na PF-2120 zitanga ubworoherane butangaje no kurekura cyane. Izi dioli z’imiterere zigabanya ubunini bwa urethane yose ku mugongo wa polimeri. Umubare muto w’amatsinda ya urethane utanga ibice byoroshye bigumana ubworoherane buri hasi kugeza kuri -60°C. Abakora formulaire bakoresha izi dioli zigororotse mu gukora ibifunga by’ingingo na elastomer za polyurethane zihinduka.

Ibikoresho bifungura uturemangingo, bitanga amashanyarazi menshi, kandi bifite ubushobozi bwo gukora neza cyane

Ingano z’inyongera zidasanzwe zihindura imiterere y’uturemangingo tw’iforo imbere n’uburyo ibintu bigenda bihinduka. Imikorere, agaciro ka hydroxyl, na viscosity ni byo bipimo by’ibanze byo gushyira mu byiciro izi polyols zihariye.

Uburyo bwo gufungura uturemangingo PF-3500 burinda gushonga kw'umwuka mu ifuro rito rihindagurika. PF-010 ifite amatsinda ya hydroxyl akora neza mu mazi abyimba. PF-2802 ifite ubushobozi bwo kongera imbaraga mu gushwanyagurika kw'inkweto. Izi polyols zidasanzwe zigumana imiterere ihamye mu gihe cyo gukora vuba.

Polyols zihumura neza na Novolac zirinda umuriro

Gukingira ubushyuhe bikomeye bisaba umuvuduko wihuse wo gutunganya, imbaraga zikomeye z’imiterere, no kwihangana bikomeye mu muriro. Polyol zikozwe muri aromatike na novolac zishyira impeta zihumura mu muyoboro mukuru wa polymer. Ibicuruzwa nka MOFAN PF-800, PF-1380, na PF-585 bitanga imikorere myiza y’ubushyuhe ugereranije na polyol zisanzwe.

Polyols zihumura neza zikorana neza n'amatsinda ya isocyanate akora mu gihe cyo gutunganya ifuro ritera. Urusobe rwa polymer ruvamo rurekura imiterere ya polyphenolic irinda ku bushyuhe bwinshi. Iyi nyigo y'imiti ikora urwego rw'ingufu rurinda mu gihe cyo guhura n'ubushyuhe. Imigozi ikomeye ya karubone-karubone itanga ubudahangarwa bw'ubushyuhe, ubudahangarwa bw'imiti budasanzwe, kandi idakora neza mu muriro. Ikoreshwa mu nganda rishingira kuri izi nyunganiramirire ku bikoresho bikomeye byo gukingira, imbaho ​​za polyisocyanurate, na elastomer nini za polyurethane. Ibikoresho bya nyuma bitanga ubuzima burambye, inkunga yizewe y'imiterere, kandi bigakomeza kurwanya imiti mu nganda zikomeye.

Polyethylene Glycols nziza cyane mu gutunganya inganda

Incamake y'uruhererekane rw'ibicuruzwa bya MOFAN PEG

Polyethylene glycolsikora nk'ibinyabutabire bitari ionic mu nganda zitandukanye zitunganya. MOFAN itanga urukurikirane rwuzuye rwa Polyethylene Glycols nziza kuva kuriPEG1000 to PEG20000Ibi bikoresho bya polyether bigizwe n'amatsinda ya hydroxyl akoresha amashanyarazi. Abakora ibi bikoresho bakoresha nk'ibintu birwanya imihindagurikire y'ikirere, amavuta yo mu nganda, ibintu birekura, n'ibikoresho fatizo. Imikorere ya shimi ishingiye kuri iyi miyoboro yizewe kugira ngo igenzure uburyo amazi agumana n'ubushyuhe mu bicuruzwa byarangiye.

Abakora ibikoresho by’inganda bahitamo ingano yihariye ya polyglycol hashingiwe ku burebure bw’umunyururu ukenewe n’imiterere y’imikorere. Inganda z’imyenda, impapuro, ibyuma, umupira, n’imiti zikoresha izi myunyungugu za polyether kugira ngo zinoze imikorere myiza. Ingano nto y’uburemere bwa molekile itanga ubushobozi bwo gushonga no kuvoma. Ingano nini y’uburemere bwa molekile itanga ubukana bwinshi bw’umubiri n’ubushobozi bukomeye bwo gufatanya. MOFAN ihindura buri cyiciro cy’imiti kugira ngo ihuze n’ibipimo by’umubiri bikomeye mu bikoresho bikoreshwa mu buryo bwikora.

Amahame ngenderwaho y'ubuziranenge n'igenzura rya potasiyumu

Gutunganya imiti bisaba ubuziranenge bukomeye bw'ibikoresho fatizo kugira ngo habeho igipimo cy'ihinduka ry'ibice. Ibisigazwa by'ibice bya katalyst bidakenewe nka iyoni za potasiyumu bibangamira ingaruka z'ibice bya katalyst. MOFAN igenzura urugero rwa potasiyumu rusigaye mu gihe cyo gukora polycondensation. Kugenzura urugero rw'ibice bya katalyst birinda ingaruka z'ibindi bidakenewe mu gihe cyo gukora polyurethane polymer. Kwanduza gato kwa iyoni bigumana ubukana buhamye bw'amazi mu gihe cyo kubika.

Amanota ya tekiniki yo mu rwego rwo hejuru agabanya inenge mu miterere y’imiti ikoreshwa mu buryo bwa nyuma. Amabwiriza yo kugenzura ubuziranenge apima buri cyiciro cy’ibicuruzwa kugira ngo yemeze imiterere ya shimi kandi akomeze amahame y’ubuziranenge. Amahitamo ya USP/NF yujuje ibisabwa na monograph ya Pharmacopeia yo muri Leta Zunze Ubumwe za Amerika ku bicuruzwa byoroshye byo mu buvuzi. Inyandiko zuzuye zubahiriza amategeko zijyana n’amanota ya tekiniki kugira ngo habeho gukurikirana neza. Kuboneka kwa USP/NF, Ibiryo (E1521), n’amanota ya tekiniki bituma abahanga mu by’ubuziranenge bahitamo urwego rukwiye rw’ubuziranenge kugira ngo bamenye neza ibisabwa mu ikoreshwa.

Imiterere ifatika kuva ku mazi kugeza ku ifu

Uburemere bwa molekile ya polyglycol bugena imiterere yayo mu bushyuhe bw'icyumba. Iminyururu migufi ya polymer ikomeza kuba amazi, mu gihe iminyururu miremire ikomera ikaba ibintu bikomeye cyangwa ifu.

Abakora ifuru bahitamo ubwoko bufatika kugira ngo boroshye uburyo bwo gutunganya umusaruro. Ifu isya itembera neza mu byuma bivanga byumye. Ubwoko bw'amazi buhita buvangwa mu mazi nta bushyuhe butanga. Ifu ishaje cyane itanga imiterere myiza y'amavuta mu gutegura imiti. MOFAN itanga ubwoko bufatika buhamye kugira ngo yorohereze kuvanga imiti mu nganda.

Imikoreshereze y'inganda ya Polyether na PEG Systems

Ibikoresho byo gufunga, ibifunga, n'ibipfuka

Guhitamo abakora formulapolyols zihariyeGuhanga kole ikora neza, ibifunga, irangi ririnda, n'ibishushanyo mbonera by'imiterere. Muri sisitemu za CASE, polyol zikora di-functional na tri-functional zubaka imiyoboro ya elastic hamwe n'imyitwarire yo gupima neza. Abakora formulateur bakunze kugaragaza polyether diol na triol polyol zifite uburemere bwa molekile kuva ku 1000 kugeza 3000 ku bikoresho bya polyurethane bidakora elastic. Ibi bice by'ubwubatsi bikora imiterere ya urethane ikomeza gukomera mu gihe cy'imbaraga zisubiramo.

Polyols za polyether zikomoka ku isoko imwe zitanga ubushobozi bwo kudahindagurika cyane ugereranije na shimi ya polyester mu gutunganya ahantu hakonje. Ubwoko bwa polyether bugumana ubushobozi bwo kudahindagurika ku bushyuhe buri munsi ya zeru kuko zifite ubushyuhe buke bwo guhindura ikirahuri. Urugero, ubwoko bwa polypropylene glycol bugaragaza agaciro k'impinduka z'ibirahuri hafi ya -60°C. Poly (tetramethylene ether) glycol itanga ubushyuhe bwo guhindura ikirahuri kugeza kuri -75°C. Iyi miterere y'imikorere irinda gucika vuba mu bice byo hanze by'ingingo. Imyambaro yo hasi mu nganda ikoresha polyols zifite imikorere myiza kugira ngo yongere ubucucike bw'impande. Guhuza cyane bitera ubuso bunini burwanya kwangirika kwa shimi no kwangirika kwa mashini. Byongeye kandi, kole y'ibice bibiri ishingira kuri resins nkeya kugira ngo itose ku buso vuba. Izi sisitemu zikora zikora imiyoboro ya urethane ihamye ihuza ibyuma, pulasitiki, n'ibinyabutabire by'imiterere mu buryo bwiza. Elastomer zidasanzwe za polyurethane zitanga ubushobozi bwo guhangana no gucika ku biziga by'inganda n'ibirenge by'inkweto bito. Byongeye kandi, imiterere yihariye ya polyurethane elastomer itanga ubushobozi bwo guhangana n'amarira mu gihe cy'imitwaro ikomeye.

Ifuro rihindura imiterere, rihangana cyane kandi rihamye

Gukora ifuro bishingiye ku guhuza imikorere ya hydroxyl n'uburebure bw'umunyururu n'ibisabwa mu buryo bwihariye. Gukora ifuro ryoroheje rikoresha polyols z'umunyururu muremure zifite imikorere mike hagati ya 2 na 3. Abakora formulateur bahitamo polyols zihariye zifite uburemere bwa molekile kuva kuri 2000 kugeza 7000 kugira ngo bakore imiterere y'uturemangingo tworoshye two gukaraba ibikoresho byo mu nzu no kuryamaho. Ifuro ryihangana cyane rihuza polymers zidasanzwe zikora kugira ngo zongere ubushobozi bwo gutwara imizigo no kongera gusubira inyuma kw'uturemangingo. Ifuro ryoroheje kandi ryoroshye cyane risaba inyongera zifungura uturemangingo kugira ngo ziringanize umuvuduko w'imbere mu mwuka no gukumira gucika kw'ifuro nyuma yo gucura. Imbere mu modoka hakoreshwa sisitemu zihariye zoroshye kugira ngo hubakwe intebe nziza z'imodoka, aho kuruhuka amaboko, aho kuruhuka umutwe, n'aho kuruhuka amajwi.

Ifuro rikomeye rikingira ubushyuhe risaba urwego rwo hejuru rwo guhuza kugira ngo rigere ku gukomera kw'imiterere n'ubudahangarwa mu gihe cy'ubushyuhe bwinshi. Formulators zikoresha polyols zifite agaciro k'imikorere kari hejuru ya 3 n'umubare munini wa hydroxyl. Ubucucike bwinshi bwa crosslink butuma habaho imiterere ya closed-cells ifata imyuka ikingira imbere muri polymer matrix ihamye. Izi imiterere ya small cells zitanga ubudahangarwa bw'igihe kirekire mu bidukikije byo hanze. Ingano nziza za small cells zinoza imbaraga zo gukanda mu buryo bwa mekanike mugihe zigumana ubushyuhe buke mu mashini zikingira ubushyuhe. Imodoka zitwara abantu muri firigo, ibikoresho by'ubucuruzi, n'ingufu zikingira spray zikoresha sisitemu za polyurethane zikomeye kugira ngo hirindwe ko ubushyuhe bwiyongera. Imishinga y'ubwubatsi ishyiraho panels za polyisocyanurate zakozwe mbere kugira ngo igabanye ikoreshwa ry'ingufu mu nyubako. Ifuro rikomeye ribumba kandi ritanga ibisubizo byihariye byo gupakira ibikoresho by'ikoranabuhanga byoroshye.

Uburyo PEG ikoreshwa mu myenda, imipira, n'imiti

Polymeri za polyethylene glycol zifasha mu gutunganya ibintu bitari ionic mu buryo butandukanye mu nganda. Ingano zitandukanye z'uburemere bwa molekile zitanga imiterere itandukanye mu bikorwa byo gukora.

• Gutunganya imyenda:Ingano z'amazi nka PEG-200 zikora nk'ibigabanya ubushyuhe n'ibintu birwanya ubushyuhe. Ingano z'amazi nka PEG-400, 600, na 800 zikora nk'amavuta yo kwisiga n'ibintu bitose mu gihe cyo kurangiza fibre. Amahitamo menshi y'uburemere bwa molekile nka PEG-4000 akora nk'ibitera imbaraga n'ibintu bifasha mu koroshya ubushyuhe.
• Gukora imipira:PEG-1000 na 1500 bikora nk'ibikwirakwiza ibintu bifasha mu gutuma ibintu bihinduka neza no gukwirakwiza umwuka w'umukara wa karuboni. Ingano zikomeye nka PEG-4000 na 8000 zikora nk'ibintu bifasha mu gukuraho ibishishwa, amavuta yo kwisiga, n'ibindi bikonjesha.
• Imiti: Imiti:Polyols zishongeshwa n'amazi zikora nk'ibintu bifasha mu gukwirakwiza imiti mu buvuzi. Izi nganda zisukuye zituma imiti ishonga neza, zigatuma ikoreshwa neza mu gufunga imiti, ndetse zikanatanga umusaruro mwiza mu kuyikoresha mu kanwa no mu gusukura imiti.

Imikorere y'ibyuma mu nganda ishingiye kuri polyethylene glycols kugira ngo ikonjeshe, ishyiremo amavuta, kandi yohereze ubushyuhe. Abakora impapuro bakoresha imiti ya polyglycol kugira ngo bagenzure uburyo amazi agumana kandi bongere ubushyuhe. Izi nyongeramusaruro zitanga ubuziranenge buhamye mu bwogero butunganya aside na alkaline. Ibikorwa by'inganda bigezweho bihitamo uburemere bwihariye bwa polymer kugira ngo byoroshye umuvuduko wo gutunganya no kunoza ubwiza bw'ibicuruzwa.

Ibipimo ngenderwaho byo guhitamo polyol zidasanzwe za MOFAN

Guhuza Indangagaciro za Hydroxyl n'Imikorere n'Ibikenewe mu Gukoresha

Guhitamo polyol neza bisaba guhuza imibare ya hydroxyl n'imikorere kugira ngo bigerweho ibipimo nyabyo. Imikorere igena imiterere y'urusobe rwakize. Agaciro ka hydroxyl gapima ingano y'ahantu ha hydroxyl ikora kuri buri gice cy'uburemere. Agaciro gato ka hydroxyl gafite imikorere iri hagati ya 2 na 3 gatanga imiyoboro ya elastic. Agaciro ka hydroxyl gafite imikorere iri hagati ya 4 na 8 gakora imiterere ya thermoset ikomeye. Abakora formulateur basuzuma ibi bipimo kugira ngo bahuze imiterere ya nyuma ya mekanike. Urugero, polyol ya polyether ifite agaciro ka hydroxyl ka 150 mg KOH/g n'uburemere bw'impuzandengo ya molekile ya 1200 g/mol igaragaza imikorere hafi ya 3.2. Abakora formulateur bakoresha iki cyiciro cyihariye kugira ngo bakore paneli za foam zitoroshye ku paneli z'imbere z'imodoka.

Guteza imbere ubukana, imikorere, no kuvura Kinetics

Intsinzi mu gutunganya ibintu iterwa n'imyitwarire nyayo y'amazi n'umuvuduko wo kuyakira. Guhitamo polyol z'amazi zifite uburemere bukwiye bwa molekile bigenzura ubushyuhe bw'ibanze. Formulateurs zongeramo karubone ya karubone ishyushye ku gipimo cya 20-40 wt.% kugira ngo zongere ubudahangarwa bwo kwangirika. Byongeye kandi, kongeramo silica ifumye ku gipimo cya 2-5 wt.% bitanga imyitwarire ikomeye ya thixotropic kugira ngo hirindwe kugwa ku bice bihagaze. Guhuza prepolymers hamwe n'ikigereranyo cya isocyanate na hydroxyl kiri hagati ya 1.8:1 na 2.5:1 bifasha gushimangira ubushyuhe bw'imikorere. Guhitamo polyol witonze byoroshya imikorere ihindagurika mu bikoresho byikora.

Katalogeri za Organotin nka DBTDL ku gipimo cya 0.01-0.1 wt.% zishyiraho igipimo cy’ingaruka zishobora kubaho. Izi nyongeramusaruro zituma habaho ikorwa rya urethane kugira ngo habeho ubuso budafite tack mu minota 30 kugeza kuri 90. Katalogeri za amine za gatatu ziyongera cyane mu miterere y’ubuvuzi muri sisitemu ya polyurethane. Guhuza katalogeri zikora na polyol zikora neza birinda ikorwa ry’ubusa mu bice by’umubiri bicucitse.

Kongera ubushobozi bwo gushyuha no kurwanya ibidukikije

Guhitamo umugongo bigenga ubudahangarwa bwa hydrolytic no kudahangarwa n’imiti mu gihe kirekire. Polyols za polyether zigumana ubudahangarwa bwiza bwa hydrolytic, zimara amasaha arenga 2000 ku bushyuhe bwa 95% na 70°C nta gihombo gikomeye. Ku rundi ruhande, polyols za polyester zangirika vuba iyo hari ubushyuhe bwinshi kuko ubushuhe bwibasira amasano ya ester. Guhitamo polyols zindi aho guhitamo polyols za polyester binongera ubudahangarwa bw’amazi muri polyurethane elastomers. Polyols zihariye zitanga ubudahangarwa bwiza bwa shimi mu nganda zikenera cyane. Polyols zihariye za polybutadiene zigumana uburemere burenze 98.5% mu gihe cyo guhora zihura na 100°C mu gihe cy’amasaha 1000, bigatuma ihinduka rya elastic modulus riguma munsi ya 100%.

Ingufu zihumura neza zitanga ubushyuhe bukomeye kugira ngo zirinde ubushyuhe bwinshi buturuka ku bwoko bwa isocyanate butagize ingaruka. Uburyo bwa Aliphatic burinda ibara rikomeye rya UV. Imashini zikora ibyuma zongeramo antioxydants ku kigero cya 0.5–1.5 wt% kugira ngo zongere ubudahangarwa bw'igihe kirekire bwa oxidative. Kongeramo UV stabilizers ku kigero cya 0.5–2.0 wt% birinda ibikoresho byo hanze kwangirika kw'imirasire y'izuba. Guhitamo polyol neza bituma polyols zihariye zigumana imiterere y'ingenzi ya polyurethane mu bikorwa bitandukanye byo hanze.

Polyols zidasanzwe za MOFANn'uruhererekane rwa polyethylene glycol nziza bitanga agaciro k'ibanze mu buhanga bwa polymer bugezweho. Imiterere myiza ya molekile yemerera polyols kunoza uburyo bwo gukora neza ibintu n'imbaraga z'urusobe rw'ibintu. Imiterere y'ibikoresho byihariye yongera imikorere y'ibicuruzwa mu makoma ya polyurethane, ibifunga by'imiterere, elastomer zihindagurika, na foams zirinda ubushyuhe. Imashini zikora zishyiraho uburyo bwo kurwanya ubushyuhe, kudahungabana kw'ubushyuhe, no kuramba kwa mashini binyuze mu buhanga bugenzurwa. Ibikorwa byo gutunganya inganda bigeraho umusaruro mwiza w'inganda hamwe n'ibi bisubizo bya shimi bifite isuku nyinshi mu mirongo itandukanye yo gutunganya. Abakiriya b'inganda baratumiwe kugisha inama abahanga mu bya tekiniki ba MOFAN kugira ngo bakore imiterere yihariye, batunganye intego zikomeye zo gutunganya, kandi bahabwe inkunga yihariye ku bikenewe mu nganda.

Ibibazo Bikunze Kubazwa