Polypropylene Physical Thiab Chemical Properties
Jan 11, 2024| 1. Tsis muaj ntxhiab tsw, tsis qab thiab tsis muaj tshuaj lom. Nws yog lub teeb tshaj plaws ntawm cov khoom siv feem ntau;
2. Cov khoom siv zoo heev, suav nrog lub zog tensile, compressive zog thiab hardness, zoo heev rigidity thiab khoov qaug zog kuj. Lub pob khawm txav tau ua los ntawm PP tuaj yeem tiv taus ntau dua 7 × 107 lub sijhawm ntawm folding thiab khoov yam tsis muaj kev puas tsuaj, cuam tshuam lub zog ntawm qhov kub tsis zoo. Lub zog tensile ntawm PP feem ntau yog 21-39 MPa; Lub zog dabtsi yog khoov yog 42-56 MPa, lub zog compressive yog 39-56 MPa, qhov elongation ntawm qhov tawg yog 200% ~ 400%, qhov cuam tshuam qhov cuam tshuam yog 2.2-5 kJ / m2, thiab qhov kub tsis tshua muaj kev cuam tshuam lub zog 1-2 kJ/m2. Rockwell hardness R95 ~ 105;
3. Cov cua kub zoo, kev siv tsis tu ncua tuaj yeem ncav cuag 110-120 degree;
4. Zoo tshuaj stability. Tsuas yog cov oxidants muaj zog, nws tsis cuam tshuam nrog feem ntau cov tshuaj. Cov kuab tshuaj tsis tuaj yeem yaj PP ntawm chav tsev kub. Tsuas yog qee cov halogenated tebchaw, muaj ntxhiab hydrocarbons thiab high-boiling aliphatic hydrocarbons tuaj yeem ua rau nws o. Nws muaj cov dej tsis zoo tshwj xeeb. ;
5. Cov khoom siv hluav taws xob zoo heev, ua haujlwm zoo rau cov hluav taws xob hluav taws xob ntau zaus, thiab cov hluav taws xob zoo hauv qhov chaw ntub dej;
6. Txij li thaum muaj ntau cov tertiary carbon atoms nrog methyl pawg ntawm cov saw tseem ceeb ntawm PP, cov hydrogen nyob rau hauv tertiary carbon atoms tau yooj yim tawm tsam los ntawm oxygen. Yog li, PP muaj cov huab cua tsis zoo thiab yuav tsum tau ntxiv cov tshuaj antioxidants lossis ultraviolet absorbers [16];
7. Cov nas tsuag tau noj 1 mus rau 5 zaug ntawm qhov koob tshuaj 8g/kg, thiab tsis muaj tsos mob tshwm sim ntawm kev lom. Cov nas tsuag tau nqus cov khoom decomposition ntawm polypropylene thaum cua sov rau 210-220 degree 30 zaug rau 2 teev txhua zaus, ua rau cov tsos mob ntawm qhov muag mucosa thiab ua pa sab sauv. Zoo li polyethylene, nws raug txwv tsis pub siv nws cov khoom siv los tuav cov zaub mov.