Isho ukuthini i-UV stabilizer?
Iziqinisi ze-UV yizinto ezisetshenziselwa ukuvimbela inqubo yamakhemikhali ebizwa ngokuthi "i-photodegradation," eyenzeka lapho imisebe ye-ultraviolet evela emithonjeni yokukhanya yokwenziwa noma ilanga linqamula izibopho zamakhemikhali ngaphakathi kwama-polymer.
Ngokusebenzisa lezi ziqinisi, izimpawu zokulimala ngokomzimba noma ukugqwala zingagwenywa, okuhlanganisa:
ohlikiziwe
ukuqhekeka
Umbala uyashintsha
I-UV Stabilizers Yachazwa
Iziqinisi ze-UV ngokuvamile zisebenza ngokumunca imisebe evela emisebeni ye-UV bese zikhipha amandla njengokushisa{0}}ezingeni eliphansi.
Ama-polymer amaningi okwenziwa nawemvelo angahlaselwa imisebe ye-UV. Ngenxa yalokho, imikhiqizo noma izinto ezenziwe ngama-polymers zingabola, ziqhekeke, noma zilimale uma zingaqinisiwe yi-UV. Ukuwohloka kuhlobene nokukhanya kwe-UV futhi kubonakala kakhulu ezintweni namathuluzi achayeka elangeni. Ukuchayeka njalo emisebeni ye-UV kungaba yinkinga enkulu, njengoba umonakalo uncike enanini lokuchayeka.
Kulokhu, ama-polymers ahlaselwa, angafaka i-polypropylene, njengentambo yezimboni. Imisebe ye-ultraviolet isabela namabhondi ukuze ikhiqize ama-radicals mahhala, aphinde acushwe komoyampilo endaweni ukuze akhiqize amaketanga e-carbonyl. Uma lokhu kwenzeka, izindawo eziveziwe zomkhiqizo zingaqhekeka, zishintshe umbala, futhi kwezinye izimo zilimale ngokuphelele. Ezinye izibonelo ezivamile zama-polymers azwela kakhulu emisebeni ye-UV zihlanganisa i-Kevlar noma i-Aramid fibers.
Izinkinga ezihlobene nokuwohloka kwe-UV zingatholwa nge-infrared spectroscopy. Uma inkinga isihlonziwe, kufanele kusetshenziswe ukuvikeleka okwanele ngaphambi kokuba kwenzeke umonakalo omkhulu kakhulu. Yilapho kusebenza khona iziqinisi ze-UV. Lezi zinzinzisi zingasetshenziswa ukuvikela ekuhlaselweni kwe-UV ngokwengeza amakhemikhali ukuvikela emisebeni ye-UV. Zixubene zibe imikhiqizo ye-polymer ngaphambi kokubunjwa kokugcina noma ukubunjwa.
