Nā Mea Polyurethane Hydrophobic i hoʻohui ʻia ma o Theoremchem Dimeryl Diisocyanate DDI

Nā Manaʻo Koʻikoʻi

• Hoʻohana ʻo Theoremchem DDI i kahi kaulahao kalapona lōʻihi e ālai i ka wai a pale i nā polyurethanes mai ka hōʻino ʻia o ka makū.
• Noho palupalu nā mea i hoʻokumu ʻia ma DDI i ke anuanu a pale i ka melemele ʻana mai ka ʻike ʻana o ka lā.
• Hoʻohana nā mea hana i ka DDI e hana i nā mea paʻa nā uhi pale wai, nā mea hoʻopaʻa kai, a me ka palekana o nā mea uila.

ʻAno Kemika a me ke ʻano Hydrophobic o DDI

Hoʻololi ʻo Theoremchem Dimeryl Diisocyanate (DDI) i nā ʻano polyurethane maʻamau i nā polymers wai-repellent. Hoʻohui kona ʻano kemika kū hoʻokahi i nā waiwai aliphatic me kahi ʻano hydrocarbon nui. Hoʻokumu kēia hoʻolālā i kahi pale paʻa e kūʻē i ke komo ʻana o ka wai ma ka pae molekala.

ʻO ke kuamoʻo ʻakika momona Dimer C36 Non-Polar

ʻO ka mea huna nui ma hope o ke kūpaʻa wai o Theoremchem DDI aia i loko o kona ʻano kumu. Loaʻa i nā diisocyanates kuʻuna e like me MDI a i ʻole TDI nā kaulahao kalapona pōkole a i ʻole nā ​​apo ʻala. I ka hoʻohālikelike ʻana, hōʻike ʻo DDI i kahi iwi kuamoʻo momona C36 dimer lōʻihi.

Nā Isocyanates Kuʻuna (Kaulahao Pōkole) ---> High Hydrophilic Susceptibility Theoremchem DDI (C36 Dimer Backbone) ---> Pale Hydrophobic Nui 

ʻAʻole polar loa kēia kaulahao hydrocarbon 36-kalapona. ʻAʻole hana nā ʻano kemika non-polar i nā pilina hydrogen me nā molekala wai. Akā, hoʻokuke nā kaulahao alkyl lōʻihi i nā molekala wai mai ka pūnaewele polymer. ʻO ke kiʻekiʻe o ka nui o nā ʻātoma kalapona a me hydrogen e hana i kahi pale hydrophobic mau ma loko o ka matrix i hoʻōla ʻia.

Nā Manaʻo Koʻikoʻi: Hana ka iwi kuamoʻo o ka waikawa momona dimer C36 ma ke ʻano he pae lipid kūloko i loko o ka matrix polyurethane. Hoʻokuke ia i ka wai wai a kaupalena i ka hoʻolaha ʻana o ka makū ma o ka mea.

ʻAno Aliphatic a me ka Ikehu ʻIli Haʻahaʻa

Loaʻa i ka Theoremchem DDI kahi ʻano aliphatic piha. ʻAʻohe apo ʻala i nā hui aliphatic, kahi e pale ai i ka photo-oxidation a me ka melemele ma lalo o ka lā. Eia kekahi, hoʻohaʻahaʻa nui kēia ʻano aliphatic C36 i ka ikehu o ka ʻili o nā polyurethanes i synthesized ʻia.

ʻO nā mea me ka ikehu ʻili haʻahaʻa e hoʻoulu ai i nā wai e piʻi aʻe ma mua o ka hohola ʻana. Hōʻike nā polyurethanes i hoʻokumu ʻia ma DDI i nā kihi pili wai kiʻekiʻe.

ʻO ka ikehu haʻahaʻa o ka ʻili e pale aku i ka wai wai mai ka hoʻomaʻū ʻana i ka ʻili polymer. ʻO nā kulu ua a me ka condensation lewa e ʻōwili maʻalahi mai ka mea. Hōʻoia kēia ʻano hana i ka palekana lōʻihi no nā substrates palupalu ma lalo o ka uhi a i ʻole ka sealant.

Ke pale ʻana o Steric e kūʻē i ka ʻoki ʻana o ka hydrolytic

Hoʻohaʻahaʻa ka wai i nā polyurethanes maʻamau ma o ka hoʻouka ʻana i nā loulou ester a me urethane. Ua kapa ʻia kēia kaʻina hana hoʻohaʻahaʻa kemika he hydrolysis. Pale aku ʻo Theoremchem DDI i ka hydrolysis ma o kahi ʻano hana i ʻike ʻia ʻo steric hindrance.

Hoʻokumu nā kaulahao dimer C36 lōʻihi i ka nui o ka wahi a puni nā pilina kemika palupalu. Hoʻopale kino kēia mau lima hydrocarbon nui i nā molekala wai ($H_2O$) mai ka hiki ʻana i nā loulou urethane.

• Hoʻopiha nā hui C36 nui i ka hakahaka molekala e hoʻopuni ana i nā hui ester a me urethane.
• ʻAʻole hiki i nā molekula wai ke komo i nā pilina kemika e hoʻoulu ai i ka ʻoki ʻana o ka pilina.
• Mālama ka pūnaewele polymer i kona ikaika tensile mua a me ka elasticity i ka hala ʻana o ka manawa.

Hōʻike ka noiʻi noiʻi o DDI (Dimeryl Diisocyanate) e ālai kino ana nā hui aliphatic nui i nā molekala wai mai ka hiki ʻana i nā wahi hoʻopaʻa paʻa. No laila, ola nā polyurethanes i hana ʻia me Theoremchem DDI i ka hoʻomau ʻana i ka hoʻopili ʻia ʻana i nā wahi wela, pulu, a me ka wai i lalo me ka ʻole o ka haki ʻana o ke ʻano.

Nā Pono Hana o nā Polyurethanes i hoʻokumu ʻia ma DDI

Hāʻawi ka Theoremchem Dimeryl Diisocyanate (DDI) i nā mea polyurethane i nā ʻano kino a me nā kemika kūikawā. Loaʻa i nā mea hoʻohui ʻoihana nā pono hana kūikawā ke pani ʻia nā isocyanates kuʻuna me DDI. Hāʻawi ke kaulahao aliphatic C36 lōʻihi i kahi kaulike kūpono ma waena o ka paʻakikī mechanical a me ke ahonui o ke kaiapuni.

ʻOi aku ka maikaʻi o ke kūpaʻa hydrolysis a me ke kūpaʻa ʻelemakule

Hoʻoulu nā molekala wai i ka hōʻino ʻino ʻana o ke kaulahao polymer i nā wā lōʻihi. Hoʻoponopono ka Theoremchem DDI i kēia pilikia ma ka pale ʻana i nā pilina urethane hydrolytically sensitive.

ʻIke Koʻikoʻi: Mālama nā ʻano hana e hoʻohana ana i ka DDI a hiki i ka 95% o ko lākou ikaika tensile mua ma hope o nā hoʻāʻo hoʻoluʻu wai lōʻihi, ʻoiai ʻo nā polyurethanes maʻamau e pili ana i ka TDI e hōʻeha nui ʻia.

Noiʻi Noiʻi o DDI (Hōʻike ʻo Dimeryl Diisocyanate i kona hiki ke mālama i nā waiwai mechanical ma hope o ka hoʻolōʻihi ʻia ʻana i ka makū a me ka wela. Ke ālai nei ka iwi kuamoʻo hydrophobic C36 nui i ke komo ʻana i ka makū. No laila, kūʻē nā polymers i ka ʻoki ʻana o ke kaulahao, ka palupalu, a me ka embrittlement ma luna o nā ola lawelawe he nui makahiki.

Ka Hoʻopili Haʻahaʻa o ka Makū a me ka Permeability Vapor

Hōʻike nā pūnaewele polyurethane i loaʻa iā DDI i ka lawe ʻana i ka wai wai haʻahaʻa loa. Hoʻokumu ka ʻūlū hydrophobic paʻa i kahi pale kino paʻa i loko o ka elastomer crosslinked.

• Ka Hoʻopili Wai Haʻahaʻa Loa: ʻOi aku ka liʻiliʻi o ka wai ma mua o 0.5% o ke kaumaha ma hope o 24 mau hola o ka hoʻoluʻu piha ʻana o nā elastomers i hoʻokumu ʻia ma DDI.
• Pale ʻAna i ka Maluhia o ka Mahu: Hoʻopale ka pūnaewele hydrophobic i ka hoʻoili ʻana o ka mahu ma o nā ʻiliʻili polymer lahilahi.
• Palekana i ka ʻino: Pale ka permeability mahu i lalo o nā mea metala e kūʻē i ka popo a me ka pōʻino oxidative.

Pale aku kēia ʻike haʻahaʻa i ka makū i ka pehu ʻana a me ka nalowale ʻana o ka pipili i nā uhi i hōʻike ʻia i ka makū kiʻekiʻe a i ʻole nā ​​​​kūlana ma lalo o ka wai.

Hoʻonui ʻia ka maʻalahi a me ka hana haʻahaʻa haʻahaʻa

Loaʻa i ka Theoremchem DDI kahi ʻano dimer aliphatic lōʻihi. Hoʻohaʻahaʻa nui kēia kaulahao palupalu i ka mahana hoʻololi aniani ($T_g$) o nā ʻāpana palupalu i nā ʻano polyurethane.

Kaula Aliphatic Dimer Lōʻihi ---> Tg Haʻahaʻa ---> Ka Neʻe ʻana o ke Kaula Kiʻekiʻe ma nā Manawa Haʻahaʻa 

Hāʻawi ʻo DDI i ka neʻe ʻana o ke kaulahao kiʻekiʻe a me ka plasticization kūloko me ka ʻole o ka koi ʻana i nā mea hoʻohui kūwaho volatile. Hōʻike ka papa ma lalo nei i nā hoʻomaikaʻi hana i hoʻokō ʻia me nā ʻōnaehana DDI:

Loaʻa i nā mea hoʻohuihui ke kūpaʻa hopena kūkulu maikaʻi loa ma nā puka makani mahana hana ākea.

• Hoʻonui ʻia ka Elongation ma ka Break: ʻO ke ʻano hoʻolālā molekala aliphatic kaulahao lōʻihi o DDI e hāʻawi i ka neʻe ʻana o ke kaulahao a me ka elasticity kiʻekiʻe, e pale ana i ka nahā ma lalo o ke kūlou ikaika a i ʻole nā ​​​​​​pilikia hopena.
• Ka Hoʻololi Haʻahaʻa o ka Mahana: Hoʻohaʻahaʻa ʻo DDI i ka mahana hoʻololi aniani ($T_g$) o nā ʻāpana palupalu polyurethane, e hiki ai i ka elastomer ke mālama i ke kiʻekiʻe ka maʻalahi i nā mahana haʻahaʻa me ka ʻeha ʻole i ka embrittlement.

Ke kūpaʻa kemika a me ka UV maikaʻi loa

Hāʻawi nā isocyanates Aliphatic i ke kūpaʻa kūloko e kūʻē i ka radiation o ka lā a me nā kemika hoʻouka kaua. ʻAʻole e like me nā hui ʻala, ʻaʻohe DDI i nā conjugations pilina pālua carbon-carbon e omo i ka lā.

ʻO nā uhi i hoʻokumu ʻia e DDI e kū i ka mālamalama ultraviolet mau me ka ʻole o ka melemele, ka chalking, a i ʻole ka micro-cracking o ka ʻili. Eia kekahi, kūʻē ka iwi kuamoʻo hydrocarbon non-polar i nā waikawa, nā alkalis, a me nā paʻakai, e mālama ana i ka pono kūkulu lōʻihi i nā wahi ʻoihana paʻakikī.

Nā Alakaʻi Hana a me ka Hana ʻana no ka Hydrophobicity Optimal

Pono nā mea hoʻohuihui e hahai i nā palena hana kikoʻī e hoʻonui i nā ʻano wai-repellent o ʻO ke kumumanaʻo DDIʻO ke kaulike kemika koʻikoʻi a me ke koho ʻana i nā ʻāpana e hōʻoia i ka hoʻōla piha ʻana a me ka nui o ka pūnaewele.

Ke kaulike ʻana o Stoichiometric a me ka hoʻonui ʻana i ka ratio NCO/OH

ʻO ka hoʻokō ʻana i ka hydrophobicity kiʻekiʻe loa e pono ai ka kaohi pololei o ka helu stoichiometric. Mālama pinepine nā mea hoʻohui i kahi ratio NCO/OH ma waena o 1.03 a me 1.08.

• Hoʻopiʻi nā hui isocyanate keu i ka makū liʻiliʻi o ke ambient i ka wā e hana ai.
• ʻO ka hopena piha o nā hui hydroxyl e pale ai i nā wahi hydrophilic i hana ʻole ʻia i loko o ka matrix.
• Hoʻokumu ka nui o ke crosslinking i kahi matrix polymer paʻa e kūʻē i ke komo ʻana o ka wai.

ʻO ka lakio stoichiometric kaulike e hōʻoia i ka hoʻokumu piha ʻana o ka pūnaewele polymer. No laila, pale aku ka polyurethane i hoʻōla ʻia i ka wai a mālama i ke kūpaʻa o ka hoʻonohonoho ʻana.

Koho Polyol no ka Hydrophobicity Synergistic

Hoʻopili pololei ke koho ʻana o ka Polyol i ka ikehu hope loa o ka elastomer polyurethane. ʻO ka hui pū ʻana o Theoremchem DDI me nā polyols hydrophobic e hana i ka pale wai synergistic ikaika.

Manaʻo Hoʻohuihui: Ke hoʻohui nei iā DDI me nā polyols non-polar e like me polibutadiene i hoʻopau ʻia me ka hydroxyl (HTPB) hua mai i nā polyurethanes me ka omo wai haʻahaʻa loa.

Hōʻike ka noiʻi noiʻi o DDI (Dimeryl Diisocyanate) e hoʻonui ka hui ʻana o DDI me nā polyols dimer acid-based i ke kūpaʻa hydrolytic. Hana kēia mau ʻāpana palupalu non-polar ma ka ʻaoʻao o ke kuamoʻo C36, e sila pono ana i ka matrix polymer e kūʻē i ka hoʻouka kaua wai.

Ka Mahana Hana a me ke Koho ʻana o ka Mea Hoʻoulu

ʻO ka reactivity kaulike o Theoremchem DDI e ʻae i ka hoʻomalu maʻalahi i nā kinetics reaction. Mālama nā kemika i nā mahana synthesis ma waena o 70°C a me 90°C i ka wā o ka hoʻomākaukau ʻana o ka prepolymer.

Pale nā ​​ʻano wela i kāohi ʻia i nā hopena ʻaoʻao a mālama i ke ʻano hydrophobic o ke kaulahao polymer.

Noiʻi Noiʻi o DDI (Dimeryl Diisocyanate)

Hoʻohui nā mea hoʻohui ʻoihana i ka Theoremchem Dimeryl Diisocyanate i loko o nā ʻano polymer kūikawā. ʻO ka ʻiʻo hydrophobic C36 kū hoʻokahi e hiki ai i ka palekana kiʻekiʻe ma waena o nā ʻāpana loea koi.

Nā Uhi Pale Wai a me nā Membrane Pale

Hoʻohana nā mea hana i ka Theoremchem DDI e hana i nā uhi pale wai hana kiʻekiʻe. Pale ka kaulahao C36 non-polar i nā substrates sima, lāʻau, a me nā metala mai ka komo ʻana o ka makū. Noiʻi Noiʻi o DDI (Hōʻike ʻo Dimeryl Diisocyanate i ka maʻalahi o ka ʻoniʻoni a me ka hiki ke hoʻopili i nā māwae ma lalo o nā kūlana ʻino.

Nā Sila Moana a me nā Mea Hoʻopili ma lalo o ka Wai

Pono nā ʻano kai i ke kūpaʻa mau ʻana o nā mea i ka pīpī paʻakai a me ka hoʻokomo ʻana i ka wai. Hāʻawi nā polyurethanes i hoʻokumu ʻia e DDI i ka ikaika pipili lōʻihi ma nā ʻili pulu me ka ʻole o ka hydrolysis kemika.

Hoʻākāka nā ʻenekinia i kēia mau mea hoʻopaʻa paʻa no nā papahele moku, nā hui ʻili, a me nā pilina paipu i lalo o ka wai.

Nā Encapsulants Uila a me nā Pūhui Potting

Pono nā ʻāpana uila palupalu i ka palekana hilinaʻi e kūʻē i ka makū o ka lewa a me ka pala kemika. Hoʻopili pono nā hui ipu polyurethane i hana ʻia me DDI i nā microcircuits koʻikoʻi.

Pōmaikaʻi Koʻikoʻi: Mālama nā hui ipu DDI i ka insulation dielectric kiʻekiʻe a me ka permeability wai haʻahaʻa loa, e pale ana i nā mea uila palupalu e kūʻē i nā kaapuni pōkole uila.

Nā Uhi Uhi Hydrophobic a me nā ʻIli Synthetic

Hoʻopili nā mea hana lole i nā emulsions DDI wai e hoʻopau i nā lole loea kiʻekiʻe a me nā ʻili synthetic. Hāʻawi kēia hana kūikawā i ka pale wai paʻa me ka mālama ʻana i nā lole i ka palupalu a me ka maʻalahi. Hōʻike ka noiʻi noiʻi o DDI (Dimeryl Diisocyanate e hoʻomanawanui nā lole i mālama ʻia i nā pōʻaiapuni holoi pinepine me ka ʻole o ka nalowale ʻana o ko lākou ʻano pale wai.

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ʻO ke kumumanaʻo ʻO Dimeryl Diisocyanate (DDI) Hāʻawi i kahi hopena kemika hana kiʻekiʻe no nā polyurethanes e koi ana i ka pale piha ʻana i ka wai a me ka lōʻihi o ka mīkini. ʻO ka hoʻokomo ʻana i ka iwi kuamoʻo C36 non-polar e pale aku i nā hemahema kūkulu i nā wahi humid, moana, a me nā uila. Hana maʻalahi nā mea hoʻohālikelike i nā uhi paʻa, nā sealant, a me nā elastomers me ka hilinaʻi lōʻihi. Hōʻike ka noiʻi noi o DDI (Dimeryl Diisocyanate i nā pono koʻikoʻi o ka wā ʻino:

Nā nīnau i nīnau pinepine ʻia

Pehea e hoʻomaikaʻi ai ʻo Theoremchem DDI i ke kūpaʻa wai o ka polyurethane?

Loaʻa i ka Theoremchem DDI kahi iwi kuamoʻo hydrocarbon C36 lōʻihi, non-polar. Hoʻokuke kēia ʻano hydrophobic i nā molekala wai a pale i nā pilina kemika koʻikoʻi mai ka ʻoki hydrolytic.

Hiki i nā mea hoʻohui ke hoʻohana i ka Theoremchem DDI no nā noi o waho?

ʻAe. ʻO ke ʻano aliphatic o Theoremchem DDI e pale aku i ka photo-oxidation a me ka melemele ma lalo o ka lā. Mālama nā mea i ka transparency kiʻekiʻe, ka maʻalahi, a me ke kūpaʻa i ka wā i ka hala ʻana o ka manawa.

He aha nā polyols e hui maikaʻi loa me Theoremchem DDI?

Nā polyols polar ʻole e like me polibutadiene i hoʻopau ʻia me ka hydroxyl (HTPB) Hoʻohui maikaʻi loa ʻia me Theoremchem DDI. Hoʻopuka kēia hui pū ʻana i nā polyurethanes me ka omo wai haʻahaʻa loa a me ka maʻalahi kiʻekiʻe.