Ngā Rauemi Polyurethane Hydrophobic i Hangaia mā te Theoremchem Dimeryl Diisocyanate DDI

Ngā Whakaaro Matua

• Ka whakamahia e te Theoremchem DDI tētahi mekameka waro roa hei ārai i te wai, hei tiaki hoki i ngā polyurethane mai i te kino o te makuku.
• Ka noho ngāwari tonu ngā rauemi e hangai ana ki te DDI i te makariri, ā, ka ātete hoki ki te kōwhai i te pānga mai o te rā.
• Ka whakamahia e ngā kaihanga matū te DDI hei hanga i te wai pakari ngā paninga ātete wai, ngā hiri moana, me ngā parenga hikohiko.

Hanganga Matū me te Tikanga Wai-whakaaro o te DDI

Ka hurihia e te Theoremchem Dimeryl Diisocyanate (DDI) ngā hanganga polyurethane paerewa hei pūmua ātete-wai. Ko tōna hanganga matū ahurei e whakakotahi ana i ngā āhuatanga aliphatic me te hanganga hauwaiwai nui. Ka hangaia e tēnei hoahoa he parenga pakari ki te urunga wai i te taumata ngota.

Te Tuarā Waikawa Ngako Dimer C36 Kore-Polar

Ko te mea ngaro matua kei muri i te ātete wai o te Theoremchem DDI kei roto i tōna hanganga matua. Kei roto i ngā diisocyanate tuku iho pērā i te MDI, i te TDI rānei, he mekameka waro poto, he mowhiti kakara rānei. He rerekē, he anga roa te waikawa ngako C36 o te DDI.

Ngā Isocyanate Tuku Iho (Mekameka Poto) ---> Te Ariā Whakaraerae Wai-whakaaro Teitei DDI (C36 Dimer Backbone) ---> Parenga Wai-whakaaro Nui 

He mekameka waro-waro-36 tēnei, he kore-pōra katoa. Kāore ngā hanganga matū kore-pōra e hanga hononga hauwai ki ngā ngota wai. Engari, ka panaia e ngā mekameka alkyl roa ngā ngota wai kia matara atu i te whatunga pūmua. Nā te nui o te mātotoru o ngā ngota waro me te hauwai ka hangaia he ārai wai-pōra tonu puta noa i te matrix kua whakamaroketia.

Ngā Kōrero Matua: Ko te tuarā o te waikawa ngako dimer C36 he wāhanga ngako ā-roto i roto i te hanganga polyurethane. Ka ārai i te wai wai, ā, ka whakawhāiti i te horapa o te makuku mā roto i te rauemi.

Āhuatanga Āraipā me te Pūngao Mata Iti

He āhua aliphatic katoa te Theoremchem DDI. Kāore he mowhiti kakara i roto i ngā pūhui aliphatic, e ārai ana i te photo-oxidation me te kōwhai i raro i te rā. Hei tāpiri, ka tino whakaitihia e tēnei hanganga aliphatic C36 te kaha o te mata o ngā polyurethane kua hangaia.

Ka aki ngā rauemi he iti te kaha o te mata i ngā wai kia pupū ake, kaua e horapa noa. He teitei ngā koki pa atu o ngā polyurethane e hangai ana ki te DDI.

Nā te iti o te kaha o te mata, ka ārai te wai wai i te mākū o te mata o te pūmua. Ka tere te takahuri o ngā pata ua me te hauhautanga o te hau mai i te rauemi. Mā tēnei tikanga ka tiakina mō te wā roa ngā papa ngohengohe i raro i te paninga, i te hiri rānei.

Te Āraitanga Pūmau ki te Wehenga Waiora

Ka whakapōrearea te wai i ngā polyurethane tuku iho mā te whakaeke i ngā hononga ester me te urethane. Ka kiia tēnei tukanga pakaru matū he hydrolysis. Ka āraihia e te Theoremchem DDI te hydrolysis mā te tikanga e mōhiotia ana ko te aukati steric.

Ka hangaia e ngā mekameka roa o te dimer C36 te nui o te wāhi huri noa i ngā hononga matū ngoikore. Ka āraihia e ēnei ringa hauwaiwai matotoru ngā ngota wai ($H_2O$) kei tae atu ki ngā hononga urethane.

• Ka whakakīia te wāhi ngota e karapoti ana i ngā rōpū ester me te urethane e ngā rōpū C36 nunui..
• Kāore e taea e ngā ngota wai te uru atu ki ngā hononga matū hei whakahohe i te wehenga o te hononga.
• Ka mau tonu te kaha kume me te ngāwari o te whatunga pūmua i roto i te wā.

E whakaatu ana te Rangahau Whakamahinga o te DDI (Dimeryl Diisocyanate) ka āraia e ngā rōpū aliphatic matotoru ngā ngota wai kia kore ai e tae atu ki ngā pae here ngoikore. Nō reira, ka ora tonu ngā polyurethane i hangaia ki te Theoremchem DDI i te pānga tonu ki ngā taiao wera, makuku, me te ruku wai, me te kore e pakaru te hanganga.

Ngā Painga Mahi o ngā Polyurethanes e hangai ana ki te DDI

Mā te Theoremchem Dimeryl Diisocyanate (DDI) ka hoatu he āhuatanga ā-tinana, ā-matū hoki ki ngā rauemi polyurethane. Ka whiwhi ngā kaihanga ahumahi i ngā painga mahi motuhake ina whakakapia ngā isocyanate tuku iho ki te DDI. Mā te mekameka roa o te C36 aliphatic ka whakaratohia he taurite pai i waenga i te pakari ā-pūkaha me te manawanui taiao.

Te Ātete Pai ki te Wairewa me te Pūmautanga o te Pakeketanga

Ka pakaru kino te mekameka pūmua i ngā ngota wai mō ngā wā roa. Mā te ariā DDI tēnei raruraru e whakaoti mā te tiaki i ngā hononga urethane e tairongo ana ki te wai.

Ngā Tirohanga Matua: Ka mau tonu te kaha kume o ngā whakatakotoranga e whakamahi ana i te DDI ki te 95% o tōna kaha kume taketake i muri i ngā whakamātautau rumaki wai mō te wā roa, engari ko ngā polyurethane paerewa e hangai ana ki te TDI ka tino pakaru.

Rangahau Taupānga o te DDI (E whakaatu ana a Dimeryl Diisocyanate i tōna kaha ki te tiaki i ngā āhuatanga miihini i muri i te roa o te wā e pāngia ana e te makuku me te wera. Ko te tuara nui o te C36 hydrophobic e aukati ana i te urunga mai o te makuku. Nō reira, ka ātete ngā polymers ki te haehae mekameka, te whakangawari, me te pakarukaru i roto i ngā tau maha o te roanga o te mahi.

He iti te mimiti makuku me te uruhanga o te kohu

He tino iti te mimiti wai o ngā whatunga polyurethane kei roto te DDI. Nā te takai wai-whakaaro matotoru ka hangaia he ārai ā-tinana piripono i roto i te elastomer kua honoa.

• Te mimiti wai tino iti: I raro i te 0.5% te wai mā te taumaha ka mimitihia e ngā elastomers e hangai ana ki te DDI i muri i ngā haora 24 o te rumakitanga katoa.
• Ārai Ārai Kohu: Ka ārai te whatunga hydrophobic i te tuku o te mamaoa makuku mā roto i ngā kiriata polymer angiangi.
• Te Parenga Waikura: Ka āraihia ngā papa whakarewa mai i te waikura me te kino waikura e te iti o te uruhanga o te kohu.

Ka ārai te iti o te aro ki te makuku i te pupuhi me te ngaronga o te piri ki ngā paninga e pāngia ana e te makuku nui, e ngā āhuatanga rānei i raro i te wai.

Ngāwari Whakarei ake me te Mahi Pāmahana-Iti

He hanganga roa te dimer aliphatic o te Theoremchem DDI. Ka tino whakaitihia e tēnei mekameka ngāwari te pāmahana whakawhiti karāhe ($T_g$) o ngā wāhanga ngohengohe i roto i ngā hanganga polyurethane.

Mekameka Dimer Aliphatic Roa ---> Tg o Raro ---> Nekenekehanga Mekameka Teitei i ngā Pāmahana Iti-Kore 

Ka tukuna e te DDI te nekehanga mekameka teitei me te kirihou ā-roto me te kore e hiahiatia he tāpiringa o waho e memeha ana. Kei te ripanga i raro nei ngā taipitopito o ngā whakapainga mahi kua tutukihia me ngā pūnaha DDI:

Ka tutuki i ngā miihini whakapūtā te ātete pānga hanganga tino pai puta noa i ngā matapihi pāmahana whakahaere whānui.

• Te Whakaroa i te Wā Whakarei: Mā te hoahoa ngota ngota aliphatic mekameka-roa o te DDI ka whakawhiwhia te nekenekehanga me te ngāwari o te mekameka, ka ārai i te ngatata i raro i te piko hihiri, i ngā ahotea pānga rānei.
• Ngāwari o te Pāmahana Iti: Ka whakaitihia e te DDI te pāmahana whakawhiti karāhe ($T_g$) o ngā wāhanga ngohengohe polyurethane, ka taea ai e te elastomer te pupuri i te pāmahana teitei. ngāwari i ngā pāmahana iti me te kore e pāngia e te ngoikore.

He Ātete Matū me te UV Pai rawa atu

Ka tukuna e ngā isocyanate aliphatic te ātete ā-roto ki te hihi o te rā me ngā matū kaha. Kāore i rite ki ngā matū kakara, kāore i te DDI ngā hononga hononga takirua waro-waro e mimiti ana i te hihi o te rā.

Ka ātete ngā paninga DDI ki te hihi ultraviolet tonu, kāore he kōwhai, he kirikiri, he pakaru moroiti rānei o te mata. Hei tāpiri, ka ātete te tuara warowaihā kore-poro ki ngā waikawa, ki ngā kawakore, me ngā tote, e pupuri ana i te hanganga pumau mō te wā roa i roto i ngā taiao ahumahi uaua.

Aratohu Hanga me te Tukatuka mō te Āhua Pai o te Wai

Me whai ngā kaihanga i ngā tawhā tukatuka tika kia tino pai ai te āhua ātete-wai o Te ariā DDIMā te taurite matū rautaki me te kōwhiringa wāhanga ka tino pakari te kiri me te kiato whatunga pai rawa atu.

Te Taurite Stoichiometric me te Arotautanga o te Tauwehenga NCO/OH

Ko te whakatutuki i te ātete wai mōrahi me whakahaere tika i te taupū stoichiometric. Ko te tikanga, ka pupuri ngā kaihanga i te ōwehenga NCO/OH i waenga i te 1.03 me te 1.08.

• Ka whakaea te iti o te makuku o te taiao i te wā e tukatukahia ana e ngā rōpū isocyanate nui rawa.
• Mā te tauhohenga katoa o ngā rōpū hydroxyl ka ārai i ngā pae hydrophilic kāore i tauhohenga i roto i te matrix.
• Nā te matotoru hononga whakawhiti teitei ka hangaia he hanganga pūmua piripono e ātete ana ki te urunga wai.

Mā te ōwehenga stoichiometric taurite ka tino hangaia te whatunga polymer. Nō reira, ka panaia e te polyurethane kua rongoatia te wai, ā, ka mau tonu te pumau o te hanganga.

Kōwhiringa Polyol mō te Hydrophobicity Synergistic

Ka pā tika te kōwhiringa o te polyol ki te kaha o te mata whakamutunga o te elastomer polyurethane. Mā te whakakotahi i te Theoremchem DDI me ngā polyol hydrophobic ka puta he ātete wai kaha.

Tohutohu Hanga: Te hono i te DDI me ngā polyol kore-polar pēnei i te polibutadiene kua whakamutua te waikawa-waikawa (HTPB) ka puta he polyurethane he tino iti te mimiti wai.

E whakaatu ana te Rangahau Whakamahinga o te DDI (Dimeryl Diisocyanate) mā te hono i te DDI me ngā polyol waikawa-dimer ka whakarei ake i te pumau hydrolytic. Ka mahi tahi ēnei wāhanga ngohengohe kore-polar me te tuara C36, ka hiritia te matrix polymer mai i te whakaekenga wai.

Te Pāmahana Tauhohenga me te Kōwhiringa Whakakōkī

Mā te tauhohenga ngāwari o te Theoremchem DDI ka taea te whakahaere ngāwari i te tere o te tauhohenga. Ka pupuri ngā matū i ngā pāmahana hangahanga i waenga i te 70°C me te 90°C i te wā e whakarite ana i te prepolymer.

Ka āraihia e ngā kōtaha wera whakahaeretia ngā tauhohenga taha, ā, ka tiakina hoki te hanganga wai-hau o te mekameka pūmua.

Rangahau Whakamahinga o te DDI (Dimeryl Diisocyanate)

Ka whakauruhia e ngā kaihanga ahumahi te Theoremchem Dimeryl Diisocyanate ki roto i ngā hanganga pūmua motuhake. Mā te matua wai-whakaaro motuhake o te C36 ka taea te tiaki pai rawa atu puta noa i ngā rāngai hangarau uaua.

Ngā Paninga Ārai Wai me ngā Kiriuhi Tiaki

Ka whakamahia e ngā kaihanga matū te Theoremchem DDI hei hanga paninga ātete wai tino pai. Ka tiakina e te mekameka C36 kore-porowhita ngā papa raima, rakau, me te whakarewa mai i te urunga mai o te makuku. Rangahau Taupānga o te DDI (E whakaatu ana te Dimeryl Diisocyanate i te ngāwari o te kiriata me te kaha ki te hono i ngā pakaru i raro i ngā āhuatanga huarere hihiri.)

Ngā Hiri Moana me ngā Piripiri o raro i te Wai

Me ātete tonu ngā rauemi ki te rehu tote me te rumaki wai mō ngā taiao moana. Ka whakaratohia e ngā polyurethane e hangai ana ki te DDI te kaha piri pakari mō te wā roa ki runga i ngā mata haukū me te kore e pāngia e te waikura matū.

E tohua ana ēnei hiri pakari e ngā kaihangarau mō ngā papa kaipuke, ngā hononga o te takere, me ngā hononga paipa i raro i te wai.

Ngā Pūhui Hiko me ngā Matū Whakakī

Me tiaki pono ngā wāhanga hiko ngāwari mai i te haumākū me te waikura matū. Ka whai hua ngā matū whakaranu polyurethane i hangaia me ngā ara iahiko iti e tairongo ana ki te DDI.

Painga Matua: Ka mau tonu i ngā matū kohua DDI te whakamarumaru hiko pai rawa atu me te urunga wai tino iti ki te kohu wai, e tiaki ana i ngā hikohiko ngoikore mai i ngā ara iahiko poto hiko.

Ngā Paninga Kakahu Waipēhi me ngā Hiako Hanga

Ka whakamahia e ngā kaihanga kakahu ngā wai whakapūkara DDI hei whakaoti i ngā papanga hangarau kounga teitei me ngā hiako hangai. Mā tēnei maimoatanga motuhake ka roa te ātete wai, ā, ka noho ngawari, ka ngāwari hoki ngā papanga. E whakaatu ana te Rangahau Whakamahinga o te DDI (Dimeryl Diisocyanate) ka taea e ngā papanga kua rongoatia te tu atu ki ngā huringa horoi maha, me te kore e ngaro ō rātou āhuatanga ātete wai.

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Te ariā Dimeryl Diisocyanate (DDI) He otinga matū tino pai mō ngā polyurethane e hiahia ana kia ārai katoa i te wai me te pakari ā-mīhini. Mā te whakauru i te tuara C36 kore-porowhita ka ārai i ngā pakaru hanganga i roto i ngā taiao makuku, moana, me te hiko. Ka taea e ngā kaihanga te hanga ngāwari i ngā paninga pakari, ngā hiri, me ngā elastomer me te pono mō te wā roa. E whakaatu ana te Rangahau Whakamahinga o te DDI (Dimeryl Diisocyanate i ngā painga matua o te rangi kino:

Ngā Pātai Auau

Me pēhea te whakapai ake a Theoremchem DDI i te ātete wai o te polyurethane?

Kei roto i te ariā DDI he anga roa, kore-porotaka o te hauwaiwai C36. Ka ārai tēnei hanganga wai-pōrearea i ngā ngota wai, ā, ka ārai i ngā hononga matū tairongo mai i te pakaru wai-pōrearea.

Ka taea e ngā kaihanga tauira te whakamahi i te Theoremchem DDI mō ngā tono o waho?

Āe. Mā te hanganga aliphatic o Theoremchem DDI ka ārai i te photo-oxidation me te kōwhai i raro i te rā. Ka mau tonu te māramatanga, te ngāwari, me te ātete ki te huarere i roto i te wā.

Ko ēhea ngā polyol e pai ana te hono atu ki te Theoremchem DDI?

Ngā polyol kore-polar pērā i te polibutadiene kua whakamutua te waikawa-waikawa (HTPB) He tino pai te hononga ki te Theoremchem DDI. Ka puta mai i tēnei huinga ngā polyurethane he tino iti te mimiti wai, ā, he tino ngāwari hoki.