IbhizinisiUmkhakha

Nsuku zonke senza ukusebenzisa imikhiqizo eyenziwe kusukela PVC. Kuyini lokhu izidakamizwa?

Kufanele ukuthi empilweni yesimanje angeke kumphathe kahle kakhulu ngaphandle PVC. Kuyini setemnotfo zanamuhla? Yekuchumana PVC namuhla kufika ku-15 khilogremu isisindo ingqikithi imoto isilinganiso European, le nto ehilelekile ukukhiqizwa ezidayiswayo (amabhola, izingubo, izicathulo, ifenisha, Uthwale phansi, amakhadi okuthenga ngesikweletu, njll)

Medicine isikhathi esingaphezu kwesigamu sekhulu leminyaka futhi isebenzisa PVC. Kuyini kungabonwa ngokuhlwaya emithombolwazini eziningi imishini olulodwa-ukusetshenziswa. Lapho ungathola iphakethe amaphilisi, amathayi, amagilavu kuhlinzwa, catheters, amadivayisi ukuze ancele, izikhwama igazi. Lokhu kwaziswa libhekene eziphansi, esiye sathatha indawo ngempumelelo injoloba kanye ingilazi, inzalo kalula, ingasetshenziswa ngaphakathi emzimbeni womuntu.

Uma sibheka izinto ekhaya, abaningi babo futhi wenza PVC. Yini kungaba? ngokuvamile polyvinyl chloride luyisisekelo ukwahlukanisa kagesi, amapayipi, amaphrofayli iwindi, amathoyizi, izinto emabhokisini omakhalekhukhwini, amabhodlela epulasitiki, amashubhu ngoba wokuxubha nokunye okuningi.

Yini enquma PVC okusakazekile? Kuyini iphuzu amakhemikhali umbono? Ngokusho ifomula (-CH2-CHCl-) e degree n (idigri polymerisation) PVC kuyinto polymer zokwenziwa elingelakwaJuda base futhi ikhiqizwa chlorine ne uwoyela (57 43 per cent ngokulandelana). Ukukhiqizwa izinqubo ngesikhathi esingaphansi kwesigamu axhomeke izimpahla imikhiqizo uwoyela, okwenza ukukhululwa kwale inzuzo impahla kanye nentengo yayo - ongaphakeme.

Polyvinyl ngokubukeka kuyinto impuphu unesimo izakhiwo ezinhle Kwe-dielectric Heating. Kuyinto nengenaphunga futhi kunganambitheki, zingaxazululeki emanzini, amelana namachibi, kahle esikhanyayo (ngenxa chlorine lichaza ekwakheni), amelana acid, amafutha amaminerali, alkalis, alcohols. Lapho sishisiswe degrees 100 C. izidakamizwa ubola hydrogen chloride wenkululeko.

PVC Ukwakha iqala nge isizinda kasawoti sodium chloride (by isenzo sokukhishwa kagesi). Ngo parallel, amafutha akhishwa ethylene (inqubo ebizwa ngokuthi i "ngokuhlaziya"). Ngemva kwalokho, chlorine ne ethylene kuhlanganiswe isivuno ethylene dichloride. Ngakwelinye kudala dichloride, vinyl chloride (monomer), okuyinto ke iguqulwe ku polymerization ukuze ketshezi oyifunayo. Ukuze lokhu kunezelwa izingxenye ezihlukahlukene, okuvumela ukuthola umkhiqizo osuphelile nge izakhiwo ezithile womkhakha efanele.

PVC abakhiqizi ukusebenzisa izindlela ezintathu eziyisisekelo ukuze polymerization of monomers block, ukumiswa kanye emulsion. Kulesi ukumiswa asetshenziselwa ukuthola amapulasitiki elithambile, semi eqinile esingashintshi, futhi emulsion - imikhiqizo ezithambile sizila plastisols. Kuye ukungabi noma khona plasticizers lichaza ekwakheni ikhishwe, ngokulandelana unplasticized futhi impahla plasticized. Eyokuqala kancane ukumelana okushisa aphansi (kufika ku lokususa 15 degrees C), kanti eyesibili ukumelana ukupholisa ukuba -60 degrees. Namuhla, le nkinga embi kakhulu nala makhemikhali kuyinto iqoqo yabo futhi kabusha.

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