Polyethylene terephthalate (pet) ndeye semi crystalline polymer ine simba rekumakemikari, kunyungudika kufamba uye kusunganidzwa. Iyo polymer inoumbwa nekudzokorora zvikamu sezvakaratidzwa muhuwandu 1 Kana zvikagadzirwa kubva mukuita kwe terephthaal acid uye ethylene glycol, yakamiswa kuruboshwe neH- uye kurudyi ne -OOH. Polymerization inoperekedzwa nekugadzirwa kwemvura inobviswa pasi pekusimudzira tembiricha uye vacuum. Naizvozvo kuvapo kwemvura mumvura mudenga kunokurumidza kudzima chimiro kuitira kuti kuomesa kwepolymer vasati vanyungudika.

Iyo inonhuwirira mhete inokatyamadza nejira realiphatic inogadzira iyo polymer molecule yakaomeswa seimwe aliphatic polymers senge polyolefin kana polyamide. Iko kushomeka kwekufamba kwezvikamu mumaketeni emapolymer kunoguma nekugadzikana kwakakwirira. Iyo yekunyora giredhi Polymer ichave neyevavhare nhamba yekudzokorora zvikamu pamamorekuru kuitira kuti urefu hwePolymer yePolymer ndeye 100nm neyemukuru wemakumi maviri. Matanho epamusoro ePolymerization anogadzira yakakwira simba zvipenga asi yakanyungudutswa viscosity uye kugadzikana kweiyo nyungudika kune kunyange huwandu hwakawanda hwekunyorovesa hunokonzeresa hydrolytic kusvibiswa kweHydrolytic. Kuyerwa kweavhareji degree rePolymerization kunoitwa kungave nekumisikidza viscosity (nekuyera kudzvinyirira kudonha kuburikidza neyekudzvanywa orifete polymer mune yakakodzera sol. Iyo yekupedzisira ndeyekupedzisira yePolymer keteni inozivikanwa seyntininsic viscosity kana IV uye kukosha kweiyo yakajairika fiber grade polymer ndeye 0.6 dl / g in 60/40 w / w mushonga we phenol uye tetrachlorooroethane solvent. Iyo iv iri mune yekupedzisira solvent ine mv (viscosity avhareji molecular uremu) yePolymer neyemuchawinki chinyore (equation 1).