1
Shin kayan aikin polyurehane sun yi tsayayya ga yanayin zafi? Gabaɗaya, polyurehane ba tsayayya da babban yanayin zafi, har ma tare da tsarin PPDI na yau da kullun, iyakar zafin rana na iya zama kusan 150 °. Talakawa Polyester ko nau'ikan polyether bazai iya tsayayya da yanayin zafi sama da 120 °. Koyaya, polyurehane polymer polymer, kuma idan aka kwatanta da manyan robobi, shi ne mafi jure zafi. Saboda haka, ma'anar yawan zafin jiki na yawan zafin jiki ko bambancin daban-daban yana da bambanci sosai.
2
Don haka ta yaya za a inganta Duridar Thiskariyar kayan polyurethane? Amsar asali ita ce ƙara lu'ulu'u na kayan, kamar ainihin ppdi isocyanate da aka ambata a baya. Me yasa kara yawan lu'ulu'u na polymer yana inganta kwanciyar hankali na therse? Amsar ita ce ainihin da kowa, wato, tsarin yana ƙayyade kayan. A yau, muna son yin bayanin dalilin da yasa inganta tsari na kwayar halittun kwayar halitta ya kawo ci gaba a cikin kwanciyar hankali, ainihin ra'ayin Gibbs, watau △ g = h-st. Hannun hagu na G yana wakiltar kuzari kyauta, kuma gefen dama na daidaituwa H yana da entalpy, s shine entropy, kuma t yana da zazzabi.
3
The Gibbs Energy Concepcep ra'ayi a cikin Thermodynamics, kuma girmanta ba shi da ƙima tsakanin dabi'u da ƙarewa, kamar yadda aka saba samu kai tsaye ko wakilta. Lokacin da △ g yana raguwa, watau lokacin da yake mara kyau, yana nufin cewa sinadaran da ke sinadarai na iya faruwa ko kuma ya zama sananne ga wasu da ake tsammanin. Hakanan za'a iya amfani da wannan don sanin ko amsawa ko kuma ya zama mai juyawa a cikin thermodynamics. Za'a iya fahimtar digiri ko ragi na raguwa kamar yadda Kinetics na dauki da kansa. H are ne m, wanda za'a iya samun kimanin shi azaman makamashi na ciki na kwayoyin. Zai iya yaudare shi da kusanci daga yanayin farfajiyar Sinawa, kamar yadda wuta ba

4
S yana wakiltar entroƙan tsarin, wanda aka sani gaba ɗaya kuma ma'anar zahiri ta bayyana sarai. Yana da alaƙa da ko kuma aka bayyana dangane da zazzabi t, da ma'anar ta shine digiri ko 'yancin ɗan ƙaramin tsarin microscopic. A wannan gaba, mai da kyau aboki na jira ya lura cewa zazzabi t ya shafi juriya da muke tattaunawa da muke tattaunawa a yau. Bari na yi bitar a kan kadan game da manufar entropy. Ana iya fahimtar entropy kamar yadda akasin lu'ulu'u. Mafi girman darajar entropy, da mafi rikicin da rikice-rikicen kwayoyin halitta shine. A mafi girman tsarin tsarin kwayar halitta, mafi kyawun kwayoyin kezarin kwayoyin halitta shine. Yanzu, bari mu yanke karamin murabba'in murabba'i na polyurthane roll ne kuma la'akari da karamin dan wasa a matsayin cikakken tsarin. Massinsa an gyara shi, yana ɗaukar cewa square ne ya ƙunshi kwayoyin polyurethane 100 (a zahiri, ana iya canzawa △, a inda yake da yawan zafin jiki, kuma s ne entropy. Wato, juriya na therurethane karamin square ya dace da entalsal zuwa entalmy s. Tabbas, wannan shine mafi kusancin kari, kuma ya fi kyau a kwatanta).
5
Yana da wuya a ga cewa inganta cystallity ba kawai rage darajar entropole ba, kuma yana daɗaɗɗa kuma na yau da kullun zafin jiki ko zazzabi mai narkewar gilashi. Abin da ake buƙatar sauyawa shine tsari da lu'ulu'u kwayoyin halittar monomer bayan hadadduwa da ita ce mai mahimmanci ko fahimta a cikin layin layi. Ajiyayyen host an ba da gudummawa ta hanyar makamashin kwayar halittar, da kuma ƙarfin kwayoyin halitta shine mafi sauƙin sarrafa abin ƙwanƙwasawa, kamar yadda ruwa zai haifar da cressallization daban-daban. Bayan haka, mun kawai zaci kwayoyin polyurehane guda 100 ne, sojojin hulɗa tsakanin waɗannan kwayoyin halittar ruwa, amma ba su da ƙarfi kamar yadda haɗin hydrogen, kamar yadda basu da ƙarfi a cikin kowane kwayar cutar ta Polyurthar, don haka hydrogen Bond yana da fa'ida don inganta juriya na zafi.