Kayan shafa polyurethane suna iya yin rawaya a tsawon lokaci saboda tsawon lokacin da aka fallasa su ga hasken ultraviolet ko zafi, wanda ke shafar kamanninsu da tsawon lokacin sabis ɗinsu. Ta hanyar shigar da UV-320 da 2-hydroxyethyl thiophosphate cikin sarkar polyurethane, an shirya polyurethane mai ruwa-ruwa wanda ba shi da ionic tare da kyakkyawan juriya ga rawaya kuma an shafa shi a kan murfin fata. Ta hanyar bambancin launi, kwanciyar hankali, na'urar hangen nesa ta lantarki, X-ray spectrum da sauran gwaje-gwaje, an gano cewa jimlar bambancin launi △E na fatar da aka yi wa magani da sassa 50 na polyurethane mai ruwa-ruwa wanda aka yi wa magani tare da kyakkyawan juriya ga rawaya shine 2.9, matakin canjin launi shine 1, kuma akwai ɗan ƙaramin canjin launi kawai. Idan aka haɗa shi da manyan alamun aiki na ƙarfin jan hankali na fata da juriyar lalacewa, yana nuna cewa polyurethane mai jure rawaya wanda aka shirya zai iya inganta juriyar rawaya na fata yayin da yake kiyaye halayen injiniya da juriyar lalacewa.

Yayin da yanayin rayuwar mutane ya inganta, mutane suna da buƙatu mafi girma na matashin kujera na fata, ba wai kawai yana buƙatar su zama marasa lahani ga lafiyar ɗan adam ba, har ma yana buƙatar su zama masu kyau. Ana amfani da polyurethane mai ruwa sosai a cikin abubuwan rufe fata saboda kyakkyawan aminci da aikinta mara gurɓatawa, mai sheƙi mai yawa, da tsarin amino methylidynephosphonate irin na fata. Duk da haka, polyurethane mai ruwa yana da saurin yin rawaya a ƙarƙashin tasirin hasken ultraviolet ko zafi na dogon lokaci, yana shafar rayuwar kayan. Misali, kayan polyurethane masu farin takalma da yawa galibi suna bayyana rawaya, ko kuma zuwa mafi girma ko ƙasa da haka, za a sami rawaya a ƙarƙashin hasken rana. Saboda haka, yana da mahimmanci a yi nazarin juriya ga yin rawaya na polyurethane mai ruwa.

A halin yanzu akwai hanyoyi guda uku don inganta juriyar polyurethane mai launin rawaya: daidaita rabon sassan tauri da laushi da canza kayan da aka yi amfani da su daga tushen dalilin, ƙara ƙarin abubuwa na halitta da nanomaterials, da kuma gyaran tsarin.

(a) Daidaita rabon sassan tauri da laushi da kuma canza kayan da aka yi amfani da su na iya magance matsalar polyurethane da kanta da ke fuskantar barazanar yin rawaya, amma ba zai iya magance tasirin muhallin waje akan polyurethane ba kuma ba zai iya biyan buƙatun kasuwa ba Ta hanyar gwajin TG, DSC, juriyar gogewa da kuma gwajin tensile, an gano cewa halayen jiki na polyurethane mai jure yanayi da fatar da aka yi wa magani da polyurethane mai tsarki sun kasance daidai, wanda ke nuna cewa polyurethane mai jure yanayi zai iya kiyaye ainihin halayen fata yayin da yake inganta juriyarsa ga yanayi sosai.

(b) Ƙara kayan ƙari na halitta da nanomaterials suma suna da matsaloli kamar yawan ƙari mai yawa da rashin haɗakar jiki da polyurethane, wanda ke haifar da raguwar halayen injiniyan polyurethane.

(c) Haɗin Disulfide yana da ƙarfin juyewar juyewar juyewar juyewa mai ƙarfi, wanda ke sa kuzarin kunnawarsu ya ragu sosai, kuma ana iya karyewa da sake gina su sau da yawa. Saboda juyewar ...

Masu ɗaukar hasken ultraviolet da disulfides na iya canza hasken ultraviolet da aka sha zuwa fitar da makamashin zafi don rage tasirin hasken ultraviolet akan tsarin polyurethane. Ta hanyar gabatar da abu mai canzawa mai canzawa 2-hydroxyethyl disulfide cikin matakin faɗaɗa haɗin polyurethane, ana shigar da shi cikin tsarin polyurethane, wanda shine mahaɗin disulfide wanda ke ɗauke da ƙungiyoyin hydroxyl wanda ke da sauƙin amsawa tare da isocyanate. Bugu da ƙari, an gabatar da mai ɗaukar hasken ultraviolet na UV-320 don yin aiki tare da haɓaka juriyar rawaya ta polyurethane. UV-320 wanda ke ɗauke da ƙungiyoyin hydroxyl, saboda halayensa na sauƙin amsawa tare da ƙungiyoyin isocyanate, ana iya shigar da shi cikin sassan sarkar polyurethane kuma ana amfani da shi a tsakiyar fatar don inganta juriyar rawaya ta polyurethane.

Ta hanyar gwajin bambancin launi, an gano cewa juriyar rawaya ta polyureth mai juriyar rawaya. Ta hanyar gwajin TG, DSC, juriyar gogewa da kuma gwajin tensile, an gano cewa halayen jiki na polyurethane mai juriyar yanayi da aka shirya da kuma fatar da aka yi wa magani da polyurethane mai tsarki sun yi daidai, wanda ke nuna cewa polyurethane mai juriyar yanayi zai iya kiyaye ainihin halayen fata yayin da yake inganta juriyar yanayi sosai.