Ka mea i kapaʻiaPoelurhaneʻO ka pōkole o polyurethane, i hanaʻia e ka hopena o nā polyisocynate a me nā polyois a me nā'āpana anino. I nā nohona polyhesethane maoli, ma kahi o ka hui Amano, aia nō nā hui like me Urea a me URURET. ʻO Polyals i nā molena lōʻihi lōʻihi me nā hui criin me nā hui hydroxyl ma ka hopena, e kapaʻia nā'āpana he "
Ma waena o nā paleʻo Polirethane e hoʻouluʻia e nā'āpana palupalu a me nā kaulahao ikaika wale nō,ʻo ia wale nō he liʻiliʻi he nui amino amino a me nā mea kūpono e kāhea aku iā lākou he polyurethane. Ma kahi ākea ākea,ʻo Polyurethane he hoʻohui o Isocynate.
ʻO nāʻano likeʻole o ISOGYANANES i hana me nā hui polyhydroxy e hoʻoulu i nā mea likeʻole, nā kumuwaiwai, ettic. plyurestrhane rusbor
ʻO Pyuretonthane Rubber i kahiʻano kūikawā o ka'ōpala, i hanaʻia e ka hanaʻana i ka polyher a iʻole polyester me isocynate. Nui nāʻano likeʻole ma muli o nāʻano likeʻole o nā mea waiwai, nā kūlana kūpono, a me nāʻano croslinking. Mai kahiʻano hoʻolālā e pili ana, aia he polyester a me nā polyeter a me keʻano hana, a me keʻano o keʻano, a me keʻano type.
ʻO Synthetic polyhethane Rubber e hoʻopili nuiʻia e ka hanaʻana i ka polyester linear a iʻole ka poleteran i kahi kūlana kiʻekiʻe A laila, e hoʻohuiʻia nā mea a nā mea a me nā mea kūʻai aku e kūpono e ho'ōla ai, e lilo ana i ka rulcarized rubber. Ua kapaʻia kēiaʻano hana ma mua o ka papa hana aʻelua paha.
He hiki ke hoʻohanaʻia e hoʻohana i kahi kumu hoʻokahi-hana pākahi - hui pūʻana me ka polyester a me nā polokerhane mau e hoʻomaka ai i kahi kuʻuna, a me nā mea kūʻai akuʻo ClickLink
ʻO ka A-segment ma TPU Moolecles e hoʻolōʻihi i nā kaulahao MacromoleCular e hoʻololi ai i ka polymer E hoʻopaʻa ka b-segment i ka hoʻololiʻana o ka kaula hao macromoleCular, e kumu i ka nui o ka pôpeku a me ka hoʻohuliʻana i ka elane. Ma ka hoʻoponoponoʻana i ka radio molar ma waena o ka a me b, tpus me nā mea likeʻole i hiki ke hanaʻia. ʻAʻole pono ke nānā aku ka hoʻonohonohoʻana o ka TPU. ʻO ka pilina o ka Cross-Link e pili ana i ka polyurethane e like me keʻano o ka vulcancizan i keʻano o ka hydroxyl stock. ʻO kona huiʻana o Amino Estate,ʻo Biret Group, Urea Formula a me nā hui'ē aʻe i hoʻopaʻaʻia ma kahiʻano maʻamau a me nā waiwai maikaʻi loa. ʻO ka lua, ma muli o ke kūʻana o nā pūʻulu hana nui loa e like me nā hakakā nui ma Pydrogethane ma ka ikaika o ka lāʻau lapaʻau nui aʻe. ʻAiʻia ke kolamu Cross Springs e komo pū me nāʻano plyurethane e loaʻa ai nā hiʻohiʻona o ka thermoseting ma ka lima o ka hoʻopiliʻana, a ma kaʻaoʻaoʻaoʻao e pili ana i keʻano. ʻO keʻano o ke kūlana e pili ana i keʻano o ka mahana. E hoʻonui ana keʻano o ka mahana, e pili ana i kēia mau mea e pili ana i ka hoʻopiliʻana a nalo. ʻO ka polymer kekahi mea i lawa a hiki ke kauʻia i ka hoʻoiliʻana i ka thermoplastic. Ke emi nei keʻano o keʻano, e hoʻihoʻi houʻia kēiaʻano hana. ʻO ka hoʻohuiʻana o kahi liʻiliʻi o ka liʻiliʻi o ka liʻiliʻi e hoʻonui i ka mamao ma waena o nā mollules, nāwaliwali i ka mollungena paʻa i waena o nā moho hydrogen ma waena o nā monidrogen ma waena o nā molluen. Ua hōʻikeʻia ka noiʻiʻana i keʻano o ke kūpaʻa o nā hui hana likeʻole ma Pyerirethane Rubber mai ka haʻahaʻa: Urea,ʻo Urea,ʻo Kare. I ka wā o ke kaʻina hana o Polyurethane Rubber,ʻo ka hana muaʻo ia ka wāwahi o nā mea pili e pili ana i ke kaʻa a me nā pūlima
01 Hookahi
Plyurethane Elastomers, he he he nui nā huahana Pookitomer, e hoʻoheloi i nā noho kiʻekiʻe a me ke hoʻololiʻana i kahi o ka ikaika o ke ala. Mai kahi hiʻohiʻona o keʻano, ka nui o ka wela o ka elassisty nui loa e like me kona mau mea e like me kona mau kumu maʻamau, a me ke kaupaonaʻana o keʻano.
ʻO ka manaʻo maʻamau, e hoʻonui ana i ka kaupaonaʻana o ka moleka pili, hoʻonui i ka wikiwiki o ka hapaʻumi. No nā elastomes elastomers,ʻo ka hana molele he laina maʻamau, a hoʻonuiʻia keʻano o keʻano o keʻano o ka elastomer e hoʻonui ai i ka nui o ke kino.
No ka Cross-Links PoyureThane elastomers, he nui ka hopena o keʻano ma mua o ke kaupaonaʻana o ka molecular. No laila, aia ka hanaʻana i nā holo o nā maʻi maʻi o IstOcyenate a iʻole keʻano o ka pilina o ke aniani ma ka hānō keʻanoʻana.
Ke hoʻohanaʻia neiʻo PPDI (p-Phenydiisocy) e like me keʻano o ke kaniʻana o ka bitznene e hoʻonui ai i ka pākeke.
Mai kahi hiʻohiʻona pilikino,ʻo keʻano nui o nā elastomers e pili ana i ke kiʻekiʻe o ka hoʻokaʻawaleʻana o ka hoʻopunipuni microphise. Wahi a nā hōʻike,ʻo ka wela nui o nā elastomers e lawe i ka hoʻokaʻawaleʻana o ka hoʻokaʻawaleʻana ma lalo o 70-150 ℃. No laila, hoʻonui ana i ka pae o ka hoʻopunipuni microphise i nā elastomers ma nāʻano hana kūpono loa e hoʻomaikaʻi ai i kā lākou mau wela wela.
Hiki ke hoʻonuiʻia keʻano o ka hoʻokaʻawaleʻana o kaʻaoʻao microphose o nā elastomers ma ka hoʻololiʻana i ka māhele molena Manaʻo ka hapa nui o nā mea noiʻi e hoʻokaʻawale ke kumu o ka microophase i ka polyhorenamical i waena o nā mea palupalu a iʻole nā'āpana paʻakikī. ʻO keʻano o ka papa inoa o ka cahi, paʻakikī paʻakikī a me kāna mau mea iʻikeʻia,ʻoluʻolu haʻahaʻa, a me ka hydrogen e loaʻa ana i nā hopena nui loa ma luna o ia.
Hoʻohālikelikeʻia me Diol CHIN PRESETERS,ʻO Diamine Chai e like me MACA (3,3-DICHLOROY COCHESSOTYLLSE) keʻano o ka uila micropopeses i loko o elastomers; ʻO SyMmetric Aoomatic Chain
ʻO nā'āpana Amino esters i hoʻokumuʻia e nā isoiphatic gooticates maikaʻi me nā'āpana palupalu, e hopena ana i nā'āpana paʻakikī. ʻO nā'āpana Amino esters i hoʻokumuʻia e nā isomatic is torocynates i kahi hana palupalu me nā'āpana palupalu,ʻoiai ke kiʻekiʻe o ka hoʻokaʻawaleʻana o ka hoʻokaʻawaleʻana o ka hoʻopunipuni. Ua loaʻa iā Polyole
ʻO ka hopena o ka hydrogen e hoʻokūkū ana i ka nui o ka nui o keʻano o nā elastomers o nā elastomers. ʻOiaiʻo Polyethers a me nā kaʻaahi i loko o ka māhele palupalu e hiki ke hana i kahi helu nui o nā hydrogen nui e piʻi i ka pā paʻakikī. Ua hōʻoiaʻia ua paʻa mauʻiaʻo Hydrogen Bond i nā 40% i 200 ℃.
02 Kameike theromposition
Nā hui o Anono everter ma lalo o ka hana e pili ana i nā mahana kiʻekiʻe:
- RNhcor - RNC0 Ho-R
- Rnhcoor - RNH2 ENO
- Rnhcoor - Rnrr Co2 eng
ʻEkolu mauʻano hana nui o ka decomalposition o nā mea pili plyurethane:
① ka hoʻokumuʻana i nā mea mua a me nā polyoiola;
② α-ʻO ka Bone oxygen ma keʻano he ch2 i nā mea i wāwahiʻia a hoʻohui pū me ka mea e pili ana i ka lua o ka ch2 a me nā loli anino. Nā Kūlana Manain Naminos Down i hoʻokahi Amine Wahine a me ka Carbon Dioxide:
③ Kaʻaila Hōʻea a me ke korie Paʻi a me ke Carbon Dioxide.
ʻO ka Decomposition Thermal i keʻano o keʻano o ka carbamate.
ARENEL Nhco AryL, ~ 120 ℃;
N-alkyl-nhco-aryl, ~ 180 ℃;
Aryl Nhco n-Alkyl, ~ 200 ℃;
N-Alkyl-Nhco-N-Alkyl, ~ 250 ℃.
ʻO ka paʻaʻana o ka thermal o nā ecid amid e pili ana i nāʻano o nāʻano e like me nā mea e like me ka isocyanate a me nā polyoines. ʻOi aku ka kiʻekiʻe o nā isortanic ma mua o nā isomatic ISHOCYATES,ʻoiaiʻo nā mea momona momona ma mua o nā alomatic. Eia nō naʻe, hōʻikeʻia ka palapala palapala i ka mahana o keʻano o keʻano o keʻano o ka aniphatic amiphatic ma waena o 160-180. ʻO ke kumu e pili ana i keʻano ho'āʻo.
I kaʻoiaʻiʻo, aliphatic chdi (1,4-cyccolhexane diisocynate) a me HDi ʻIkeʻia ka chdi chdi me keʻano symmetrical iʻikeʻia e like me ka nui o ka isocynate wela loa. ʻO PyureThane Elastomorrs elastomorrs e hoʻomākaukauʻia ana mai ke kaʻina hana maikaʻi, nā maʻi haʻahaʻa haʻahaʻa loa, a me nā pale umauma kiʻekiʻe.
Eia kekahi i ka hui amino Eversier, Polyurethane Elastomorrs kekahi pūʻulu hana likeʻole e like me ka papa kiʻekiʻe.
Nhconcoo - (aliphatic urea foreate), 85-105 ℃;
- nhconcoo -
- NHCONCONN - (ALAPHATIC CHIURETT), ma kahi mahana mai kahi mahana mai 10 ° C e 110 ° C;
Nhconconh - (aromatici birett), 115-125 ℃;
Nhconh - (aliphatic urea), 140-180 ℃;
- NHCONH - (AUMOMIC UWA), 160-200 ℃;
Isocloganite sing> 270 ℃.
ʻO ka mahana o ka Tommal Decomposing o Biret a me URA e pili ana i ka hana ma mua o nā mea he nui loa o Aminoformate a me Urea,ʻoiaiʻo Isocynirate maikaʻi loa. I ka hanaʻana o nā elastomers, hiki i nā isocyanates e hiki ke hana hou me ka aminformate a me ka urea e pili ana i nā hana pili a biret. ʻOiai hiki iā lākou ke hoʻomaikaʻi i nā mea hana i nā mea hana o nā elastomers elastomers, he mea nui loa lākou i ka wela.
E hōʻemi i nā hui o ka The Thermal Unstable e like me Biret a me Urea i loko o Elastomers Pono e hoʻohanaʻia nā hoʻokūkūʻo ISOCYANATE, a me nāʻano'ē aʻe e like me ka hiki ke loaʻa i keʻano o keʻano he Elastontate Ua lilo kēia i keʻano maʻamau maʻamau no ka hanaʻana i nā mea wela wela-resistant and flame restanthane elastomers elastomers.
03 Hydrolysis a me ka Oridation Thermal
PohaLeTHAne elastomors e lawomorrs i ka Decomposition ma kā lākou mau'āpana paʻakikī a me nā hoʻololiʻana i nā wahi palupalu. ʻO ka poʻe'ē aʻeʻo Polyester he mau pale wai maikaʻi a me ka nui o ka nui o keʻano nui i ka hydrolyze ma nā kiʻekiʻe kiʻekiʻe. Hiki i ke ola o ka lawelaweʻo Polyester / TDI / DDI / mau mahina ma 4-5 mau mahina ma 50 ℃, hoʻokahi wale nō mau lā ma mua o 100 ℃. Hiki i nā mea ester e hiki ke hōʻole i nā acifsponding a me nā alcohols i ka wā iʻikeʻia ai ka wai wela, a me nā heihei
Rcoor h20- → Rcooh Hor
Pākuʻi Moana
Hookahi rnhcocr i kekahi h20- → rxhcooh2nr -
Huhū
Hoʻokahi rnhcoor-h20- → Rncooh Hors -
ʻOihanaʻAhaʻAmelikaʻoʻAno Hoʻolilo
Loaʻa iā Pyether e pili ana i nā Elastomers i nā mea i hana maikaʻiʻia, a me ka eteromers e pili ana i ka carbon i ka carbon atom. Ma hope o ka hana houʻana a me ka cleavage, hoʻonui i nā radide oxdice a me nā hydroxyl a me nā hydroxyl
ʻO nā polyesters likeʻole i ka hopena o ka wela o ka wela o nā elastomers Hoʻohālikelike me Tdi-MCA-PTMEG, TDI-MTMEG he nui ka uku o ka uku no ka makahiki he 12,0 ℃ No ka makahiki he 121 ʻO ke kumu paha e loaʻa nā kaula ppg mau kaulahao,ʻaʻole i mālama i ka hana maʻamau a hōʻemi i ka pale wela o ke kino elastic. ʻO ke kauoha a ka thermal o nā polyethers is: ptmeg> peg> ppg.
Nā hui hana'ē aʻe ma Pyurethane elastomers, e like me Urea a me Urea lāuaʻo Carbamate, ma lalo o nāʻano o ka oxidation a me nā hydrolyis oxidate a me ka hydrolyis oxidation a me ka hydrolyis oxidation a me ka hydrolyis oxidation a me ka hydrolyis oxidation a me ka hydroyis oxidation a me ka hydroly a me ka hydrolys. Eia nō naʻe,ʻo ka hui eter ka mea maʻalahi loa i ka oxidized,ʻoiaiʻo ka hui ester ka mea maʻalahi loa. ʻO ke kauoha o kā lākou antioxidant a me ka paleʻana o ka hydrolles.
Hana Antiikini: Esters> Urea> Carbasate> Ether;
ʻO ka paleʻana o Hydrolysis: Esters
E hoʻomaikaʻi i ka paleʻana o ka maʻi maʻi pyether polurethane a me ka resistist o ka polyesthan Hiki ke hoʻonuiʻia ka ikaika o ka ikaika o kēia Elastomer e 3-5 mau manawa i hoʻohālikelikeʻia me nā antioxidants (nā hopena hōʻike ma hope o 1500c no 168 mau hola). Akā,ʻaʻole ia he hopena a pauʻo Antioxadant ma Pyourethane Elastomers,ʻo Bonus Pololei ua loaʻa iaʻu nā hopena koʻikoʻi. Eia nō naʻe, ma muli o ka hana nui o nā huiʻo Phenolic i nā huiʻo Getrolicyl, e hoʻokaʻawale i nā hui he nui. Inā hoʻohuiʻia i ka wā o ka hanaʻana i nā preplyings, e hoʻopilikia nuiʻia i ka hopena stablization.
ʻO nā mea hoʻohui i hoʻohanaʻia e pale ai i ka hydrolysis o ka polyomethane e hoʻonui ai i nā colpoutes i nā carboxs i nā counterys. ʻO ka hoʻohuiʻana o ka kaʻa kaʻa ma kahi hapa nui o ka hapa nui o 2% a hiki i ka 5% ke hoʻonui i ka wai o ka wai o ka polyurethane e 2-4 mau manawa. Eia kekahi,ʻo Tirt Butyl Catechol, hexamethtylenevinemine, azidicarbonmide, etc. kekahi mau hopena anti hydrolysis.
04 Nui nā hiʻohiʻona hana nui
ʻO Pyurethane Elastomors he'āpana he nui poloka nā copolyomers ka ma lalo o ka mahana aniani me ka mahana aniani me ka mahana aniani me ka mahana o ke aniani. I waena o lākou, oligomeric polyols foxxibes,ʻoiaiʻo Diisocturenates a me nā mea liʻiliʻi molena molekeni ʻO ka hana i hoʻopiliʻia e ka mea i hoʻopiliʻia a me nā'āpana crigid chanid i hoʻoholo i kā lākou hana kūʻokoʻa:
(1)ʻO ka paʻakikī paʻakikī o ka Rubber maʻamau ma waena o Shaorer A20-A90 Hiki i Plyuerethane elastomorrs hiki ke hele i ka haʻahaʻa e like me ka pololi A10 a kiʻekiʻe e like me Shaoper d85,ʻaʻohe pono o Shaoder 25 me ka pono no ka Source kōkua;
(2) Hiki ke mālamaʻia ka ikaika kiʻekiʻe a me ka elastity kiʻekiʻe a mālamaʻia i loko o kahi ākea;
(3) Eʻaʻahu i ka paleʻana, 2-10 mau manawa i ka'ōpala kūlohelohe;
(4) pale maikaʻi loa i ka wai,ʻaila, a me nā meaʻono;
(5) Hoʻomau ka hopena kiʻekiʻe, hopohopo nui, a me ka paleʻana, a me ka paleʻana, kūpono no nā noi kiʻekiʻe;
)
(7) He hana koʻikoʻi loa ia, a me ka hana haʻahaʻa haʻahaʻa haʻahaʻa, he hopena maikaʻi loa ia i ka hipalapiuki a me kaʻulaʻula.
(8) maikaʻi maikaʻi a me nā waiwai anticotagulat;
)
Hiki ke hanaʻiaʻo Plyurethane Elastomorrs e hoʻohana ana i nā kaʻina hana maʻamau e like me kaʻalā o ka hoʻohui, me he paʻina, hui pūʻia, a me ka culcancience, hoʻohuiʻia. Hiki iā lākou ke neʻeʻia i keʻano o ka pahu wai wai e ka nininiʻana,ʻo ka papaʻaina Hiki iā lākou ke hana i loko o nā mea kanu granular a hanaʻia me ka hoʻohanaʻoleʻana, extriusion, ke puhiʻana, puhi i nā neʻe, a me nā kaʻina'ē aʻe. Ma kēiaʻaoʻao,ʻaʻole e hoʻomaikaʻi hou i ka hana hana, akā akā hoʻomaikaʻi nō hoʻi i ka hana aʻoakapa a me ka aʻa o ka huahana
POST manawa: Dec-05-2023