I te ao o te hanga pahuka polyurethane, he mahi nui tā ngā whakakorikori ki te whakatau i ngā āhuatanga me te kounga o te hua whakamutunga. Ko tētahi o aua whakakorikori ko te BDMAEE (Bis(dimethylaminoethyl) ether), he amine tuatoru tino whai hua e mōhiotia ana mō tōna pānga nui ki te tukanga pahuka i roto i ngā pūnaha polyurethane. Ka rukuhia e tēnei tuhinga te tikanga mahi a ngā whakakorikori amine, me te arotahi motuhake ki te BDMAEE, me te whakamārama me pēhea te awe o ēnei whakakorikori ki te hanga pahuka polyurethane ngāwari.
Te Tikanga Mahi aNgā Whakakōkī Aminei roto i te Hanga Polyurethane
Ko te hanga pahuka polyurethane e whakawhirinaki ana ki te tauhohenga matū i waenga i ngā isocyanates me ngā polyols. Ka taea te wehewehe i tēnei tauhohenga ki ngā tukanga matua e rua: te tauhohenga "huka" me te tauhohenga "gelation". Ka puta te tauhohenga pahuka i waenga i ngā isocyanates me te wai, ka hua ake te whakaputanga o te hauhā waro, ka hanga i te hanganga pūtau o te pahuka. Ko te tauhohenga gelation, i tetahi atu ringa, e uru ana ki te tauhohenga i waenga i ngā isocyanates me ngā polyols, ka arahi ki te hanganga o te whatunga polymer e hoatu ana ki te pahuka tōna hanganga pumau.
Ko ngā whakakorikori amine pēnei i te BDMAEE e whakamahia ana hei whakateretere i te tauhohenga huka. Ka mahi rātou mā te whakanui ake i te tere o te tauhohenga o ngā isocyanate ki te wai, ka tere ake te tukunga o te hauhā waro. He mea nui tēnei whakateretere hei whakarite kia whakawhanakehia e te huka te hanganga pūtau e hiahiatia ana i mua i te hanganga o te whatunga polymer, ki te kore ka mau te hau, ka whakararu i te kounga o te huka.
BDMAEE: He Whakaoho Matua mō ngā Pahuka Polyurethane Ngāwari
He mea nui te BDMAEE mō te hanga pahuka polyurethane ngāwari, e whakamahia whānuitia ana i roto i ngā mahi mai i ngā tāonga me ngā nohoanga motuka ki te whakamahana me te takai. Nā tōna pānga kaha ki te tauhohenga pahuka, he mea pai ake tēnei i roto i tēnei horopaki. Mā te kaha o te mahi a te BDMAEE ka tutuki i te pahuka te whānui me te hanganga pūtau ōrite e tika ana, he mea nui mō te mahi a ngā pahuka ngāwari.
Heoi anō, me āta taurite te pānga kaha o te BDMAEE kia kore ai e tere rawa, ka arahi pea ki ngā hapa o te pahuka, pērā i ngā hanganga pūtau nui, kāore i te ōrite. He maha ngā wā ka tutuki tēnei taurite mā te whakakotahi i te BDMAEE me ētahi atu tāpiringa, mā te whakarerekē rānei i te hanganga hei whakatikatika i te tere tauhohenga me te whakatutuki i ngā āhuatanga pahuka e hiahiatia ana.
Hei whakarāpopototanga, he pūmanawa pakari, he pūmanawa whai hua hoki a BDMAEEwhakakorikorimō te hanga pahuka polyurethane ngāwari. He mea nui tōna tūranga ki te whakatere i te tauhohenga pahuka hei hanga hua pahuka kounga teitei, pumau. Mā te mārama ki tōna tikanga mahi ka taea e ngā kaihanga te arotau i ā rātou tukanga me te whakatutuki i ngā putanga pai rawa atu i roto i te hanga pahuka polyurethane.
Wā tuku: 12 o Ākuhata 2024