Ingabe I-Thermoplastic Polymers Inobuthi?
Ama-polymer e-thermoplastic awuhlobo lwepulasitiki olungancibilikiswa futhi lubunjwe kabusha izikhathi eziningi ngaphandle kokushintsha amakhemikhali abalulekile. Asetshenziswa kabanzi ezimbonini ezahlukene, okuhlanganisa ukupakisha, izimoto, ezokwakha kanye nezokwelapha. Kodwa-ke, kukhona ukukhathazeka okwandayo mayelana nobuthi obungaba khona bama-polymer e-thermoplastic kanye nomthelela wawo empilweni yabantu kanye nemvelo.
Ubuthi bamapholima e-thermoplastic buncike ezintweni ezimbalwa, okuhlanganisa ukwakheka kwawo kwamakhemikhali, izithasiselo, nezindlela zokucubungula. Amanye ama-polymers we-thermoplastic, njenge-polyvinyl chloride (PVC), aqukethe amakhemikhali anobuthi njenge-phthalates, lead, ne-cadmium, angaphuma entweni futhi angcolise indawo ezungezile neketango lokudla. PVC yaziwa nangokuthi ikhulula ama-dioxins, iqembu lamakhemikhali anobuthi kakhulu angabangela umdlavuza, izinkinga zokuzala nokukhula, kanye nokulimala kwamasosha omzimba.
Amanye ama-polymers we-thermoplastic, njenge-polyethylene (PE) futhi i-polypropylene (PP), zithathwa njengeziphephile futhi zinobuthi obuncane kune PVC. Kodwa-ke, zisengaqukatha izithasiselo ezifana nezinzinzisi, ama-antioxidants, nama-plasticizers, angaba nemiphumela emibi yezempilo uma ephuma entweni bese engena emzimbeni. Isibonelo, amanye ama-plasticizer asetshenziswa ku-PE ne-PP, njenge-bisphenol A (BPA) nama-phthalates, aye axhunyaniswa nokuphazamiseka kwama-hormone, izinkinga zokukhula, nomdlavuza.
Ubuthi bama-polymers we-thermoplastic nawo buncike ezindleleni zabo zokucubungula. Ezinye izindlela zokucubungula, njengokubumba umjovo kanye nokukhipha, zingakhiqiza intuthu enobuthi nezinhlayiya ezingaba yingozi kubasebenzi nasendaweni ezungezile. Isibonelo, ukukhiqizwa kwe-polycarbonate (PC), i-polymer ye-thermoplastic esetshenziswa ku-electronics namadivayisi wezokwelapha, kuhilela ukusetshenziswa kwe-bisphenol A (BPA), ikhemikhali eliye laxhunyaniswa nokuphazamiseka kwe-hormonal kanye nomdlavuza.
Ukuze kuncishiswe ubuthi obungaba khona bama-polymers we-thermoplastic, kuye kwathuthukiswa imithethonqubo namazinga ahlukahlukene ukuze kukhawulwe ukusetshenziswa kwamakhemikhali ayingozi futhi kuqinisekiswe ukuphepha kwabasebenzi nabathengi. Ngokwesibonelo, i-European Union ivimbele ukusetshenziswa kwama-phthalates athile kumathoyizi nasemikhiqizweni yokunakekela izingane, futhi i-United States ibekele imingcele ukusetshenziswa komthofu ne-cadmium emikhiqizweni yabathengi. Ukwengeza, ezinye izinkampani zenze ezinye izindlela eziphephile zokusebenzisa ama-polymer endabuko e-thermoplastic, njengamapulasitiki abolayo enziwe ngezinsiza ezivuselelekayo.
Sengiphetha, ubuthi be-thermoplastic polymers buncike ekwakhekeni kwamakhemikhali, izithasiselo, nezindlela zokucubungula. Amanye ama-polymers we-thermoplastic, njenge PVC, aqukethe amakhemikhali anobuthi angaphuma entweni futhi angcolise indawo ezungezile kanye nochungechunge lokudla. Amanye ama-polymer we-thermoplastic, njenge-PE ne-PP, abhekwa njengephephile kodwa asengaqukatha izithasiselo ezingaba nemiphumela emibi empilweni. Ukuqinisekisa ukuphepha kwabasebenzi kanye nabathengi, kuye kwasungulwa imithetho nemigomo ehlukahlukene ukuze kukhawulwe ukusetshenziswa kwamakhemikhali ayingozi futhi kukhuthaze ukusetshenziswa kwezinye izindlela eziphephile.
