Ngesikhathi sokukhiqiza, lapho ukuncibilika kwepulasitiki kujovwa emgodini wesikhunta ngaphansi kokushisa okuphezulu nokucindezela okukhulu futhi kubunjwe ngaphansi kwengcindezi, lapho izinga lokushisa lehla, ukuncibilika kuyaphola futhi kuqiniswe engxenyeni yepulasitiki. Ubukhulu bengxenye yepulasitiki buncane kunomgodi wokubumba, obizwa ngokuthi finyeza. Izizathu eziyinhloko zokufushaniswa yilezi ezilandelayo. Lapho wenza ipulasitiki, izilinganiso ze-cross-sectional zamasango esikhunta ahlukene zihlukile. Isango elikhulu lisiza ukwandisa ukucindezela komgodi, ukwandisa isikhathi sokuvala isango, futhi kusize ukugeleza okuncibilika okwengeziwe emgodini, ngakho-ke ukuminyana kwengxenye yepulasitiki nakho kukhulu, ngaleyo ndlela kunciphise izinga lokufinyeza, ngaphandle kwalokho kuzokwandisa ukufinyela. isilinganiso.
Izinguquko ezakhiweni zamakhemikhali zesikhunta sepulasitiki phakathi nenqubo yokukhiqiza. Amanye amapulasitiki ashintsha ukwakheka kwawo kwamakhemikhali phakathi nenqubo yokubumba. Isibonelo, kumapulasitiki e-thermosetting, i-molecule ye-resin iyashintsha isuka esakhiweni esiwumugqa iye esakhiweni esifana nomzimba. I-volumetric mass yesakhiwo esifana nomzimba sikhulu kunesakhiwo somugqa, ngakho ivolumu yayo yonke ifinyeziwe, okuholela ekufinyezweni. Izingxenye zepulasitiki ezinodonga oluncane ezinokuqina kodonga olufanayo zipholiswa ngokushesha endaweni yesikhunta, futhi izinga lokufinyeza livame ukuba lincane kakhulu ngemva kokudilizwa. Uma isikhathi eside ingxenye yepulasitiki enogqinsi olufana nodonga ukuze iphole esikhaleni, kukhulu ukufinyezwa ngemva kokudilizwa. Uma ubukhulu bengxenye yepulasitiki buhlukile, kuzoba nezinga elithile lokunciphisa ngemva kokudilizwa. Endabeni yoshintsho olunjalo oluzumayo ekugqineni kwezindonga, izinga lokunciphisa lizoshintsha ngokuzumayo, okuholela ekucindezelekeni okukhulu kwangaphakathi.
Ukucindezeleka okusalayo kuyashintsha. Lapho izingxenye zepulasitiki zibunjwa, ngenxa yethonya lokucindezela kokubumba namandla okugunda, i-anisotropy, ukuxuba okungafani kwezithasiselo kanye nokushisa kwesikhunta, kuba nezingcindezi ezisalayo ezingxenyeni zepulasitiki ezibunjiwe, futhi ukucindezeleka okusalayo kuzoba kuncane futhi kusakazeke kabusha, okuholela ezingxenyeni zepulasitiki Ukufinyeza futhi ngokuvamile kubizwa ngokuthi i-post-shortening.
Isikhathi sokuthumela: Jul-19-2021