Ka ngāwari te kōwhai o ngā rauemi paninga polyurethane i roto i te wā roa nā te roa o te pānga ki te mārama ultraviolet, ki te wera rānei, ka pā ki tōna āhua me te roa o te mahi. Mā te whakauru i te UV-320 me te 2-hydroxyethyl thiophosphate ki roto i te mekameka o te polyurethane, i whakaritea he polyurethane wai-kore-ionic me te ātete pai ki te kōwhai, ā, i pania ki te paninga hiako. Mā te rerekētanga tae, te pumau, te karu hiko matawai, te whānuitanga hihi-X me ētahi atu whakamātautau, i kitea ko te rerekētanga tae katoa △E o te hiako i rongoatia ki te 50 wāhanga o te polyurethane wai-kore-ionic me te ātete pai ki te kōwhai he 2.9, ko te tohu huringa tae he 1 tohu, ā, he iti noa te huringa tae. I te whakakotahitanga me ngā tohu mahi taketake o te kaha kume hiako me te ātete kakahu, e whakaatu ana ka taea e te polyurethane ātete-kōwhai kua whakaritea te whakapai ake i te ātete kōwhai o te hiako me te pupuri tonu i ōna āhuatanga miihini me te ātete kakahu.

I te pikinga ake o te oranga o te tangata, kua piki ake ngā hiahia o te tangata mō ngā urunga nohoanga hiako, ehara i te mea me noho haumaru ki te hauora o te tangata anake, engari me ātaahua hoki. He whānuitia te whakamahinga o te polyurethane wai-wai i roto i ngā paninga hiako nā te mea he pai te haumaru me te kore parahanga, he kanapa teitei, ā, he rite te hanganga amino methylidynephosphonate ki te hiako. Heoi, he ngāwari te polyurethane wai-wai ki te kōwhai i raro i te awe roa o te hihi ultraviolet, te wera rānei, ka pā ki te roa o te whakamahinga o te rauemi. Hei tauira, he maha ngā rauemi polyurethane hu ma e ahua kōwhai ana, he nui ake, he iti iho rānei, ka kōwhai i raro i te hihi o te rā. Nō reira, he mea nui kia akohia te ātete ki te kōwhai o te polyurethane wai-wai.

E toru ngā huarahi hei whakapai ake i te ātete ki te kōwhai o te polyurethane: te whakarerekē i te ōwehenga o ngā wāhanga mārō me ngā wāhanga ngohengohe me te whakarerekē i ngā rauemi mata mai i te pūtake, te tāpiri i ngā tāpiringa waro me ngā rauemi nano, me te whakarerekētanga hanganga.

(a) Mā te whakarerekē i te ōwehenga o ngā wāhanga mārō me ngā wāhanga ngohengohe, me te whakarerekē i ngā rauemi mata, ka taea anake te whakaoti i te raruraru o te polyurethane tonu e ngāwari ana ki te kōwhai, engari kāore e taea te whakaoti i te awe o te taiao o waho ki te polyurethane, ā, kāore hoki e taea te whakatutuki i ngā whakaritenga o te mākete. Mā te whakamātautau TG, DSC, te ātete ki te pakū me te whakamātautau kume, i kitea he ōrite ngā āhuatanga ā-tinana o te polyurethane ātete-huarere kua whakaritea me te hiako kua rongoatia ki te polyurethane parakore, e tohu ana ka taea e te polyurethane ātete-huarere te pupuri i ngā āhuatanga taketake o te hiako me te whakapai ake i tōna ātete-huarere.

(b) He raruraru anō hoki kei te tāpirihia ngā tāpiringa rauropi me ngā rauemi nano pērā i te nui o te tāpiri me te ranunga ā-tinana ngoikore ki te polyurethane, ka hua ake te hekenga o ngā āhuatanga ā-pūkaha o te polyurethane.

(c) He kaha te hurihanga hihiri o ngā hononga disulfide, ka iti rawa te kaha whakahohe, ā, ka taea te pakaru me te hanga anō i ngā wā maha. Nā te hurihanga hihiri o ngā hononga disulfide, ka pakaru tonu, ka hanga anō hoki ēnei hononga i raro i te hihi ultraviolet, ka huri i te kaha hihi ultraviolet hei tukunga kaha wera. Ko te kōwhai o te polyurethane ka puta mai i te hihi ultraviolet, e whakaoho ana i ngā hononga matū i roto i ngā rauemi polyurethane, ā, ka puta he tauhohenga wehenga me te whakaritenga anō o te hononga, ka arahi ki ngā huringa hanganga me te kōwhai o te polyurethane. Nō reira, mā te whakauru i ngā hononga disulfide ki roto i ngā wāhanga mekameka polyurethane wai-pūmau, i whakamatautauria te mahi whakaora-ake me te ātete kōwhai o te polyurethane. E ai ki te whakamātautau GB/T 1766-2008, ko te △E he 4.68, ā, ko te taumata huringa tae he taumata 2, engari nā te mea i whakamahia te tetraphenylene disulfide, he tae motuhake tōna, kāore e pai mō te polyurethane ātete-kōwhai.

Ka taea e ngā mea mimiti hihi ultraviolet me ngā disulfides te huri i te hihi ultraviolet kua mimitihia hei tukunga pūngao wera hei whakaiti i te awe o te hihi ultraviolet ki te hanganga polyurethane. Mā te whakauru i te matū hurihuri hihiri 2-hydroxyethyl disulfide ki te wāhanga whakawhānui hanganga polyurethane, ka whakaurua ki te hanganga polyurethane, he matū disulfide kei roto ngā rōpū hydroxyl e ngāwari ana ki te tauhohe ki te isocyanate. Hei tāpiri, ka whakaurua te mea mimiti hihi UV-320 hei mahi tahi me te whakapai ake i te ātete kōwhai o te polyurethane. Nā te mea he ngāwari te tauhohe ki ngā rōpū isocyanate, ka taea hoki te whakauru i ngā rōpū hydroxyl kei roto te UV-320 ki ngā wāhanga mekameka polyurethane, ā, ka whakamahia ki te paparanga waenga o te hiako hei whakapai ake i te ātete kōwhai o te polyurethane.

Mā te whakamātautau rerekētanga tae, i kitea ko te ātete kōwhai o te polyureth ātete kōwhai. Mā te whakamātautau TG, DSC, te ātete ki te karawarawa me te whakamātautau kume, i kitea he ōrite ngā āhuatanga ā-tinana o te polyurethane ātete-huarere kua whakaritea me te hiako kua rongoatia ki te polyurethane parakore, e tohu ana ka taea e te polyurethane ātete-huarere te pupuri i ngā āhuatanga taketake o te hiako me te whakapai ake i tōna ātete-huarere.