tag: Polypropylene PP Izinto

I-Polypropylene, efinyeziweyo njenge-PP, i-polymer eyenziwe yi-polymerization ye-propylene. Yimpahla emhlophe ene-waxy enenkangeleko ecacileyo kunye nekhaphukhaphu. Ifomula yayo yeekhemikhali yi (C3H6) n, kwaye ubuninzi bayo ngu-0.89-0.91g / cm3. Iyatsha kwaye inendawo yokunyibilika ye-164-170 ℃. Iyathamba malunga ne-155 ℃ kwaye ingasetyenziswa kuluhlu lobushushu obuphakathi kwe -30 ukuya kwi-140 ℃. Iyakwazi ukuxhathisa umhlwa kwiiasidi, iialkali, izisombululo zetyuwa, kunye nezinyibilikisi ezahlukeneyo eziphilayo ezingaphantsi kwe80℃, kodwa inokubola phantsi kobushushu obuphezulu kunye neoxidation. I-Polypropylene yi-resin ephezulu ye-thermoplastic synthetic resin. Yiplastiki engenambala kunye nesiqingatha-engafihliyo ngokubanzi-injongo ekhaphukhaphu kunye nokumelana neekhemikhali okugqwesileyo, ukumelana nobushushu, ukugqunywa kombane, iipropathi ezinobuchwephesha obuphezulu, kunye nokusebenza kakuhle kokunxiba okuphezulu. Isetyenziswa kakhulu kwimveliso yeefayibha ezinje ngempahla kunye neengubo, izixhobo zonyango, iimoto, iibhayisekile, iinxalenye, imibhobho yokuhambisa, izikhongozeli zeekhemikhali, kunye nokutya kunye nokupakishwa kwamayeza.

Iimpawu zePhysical and Chemical Properties

1. Ayinavumba, ayinancasa, kwaye ayinayo ityhefu. Yeyona ilula phakathi kweereyini ezisetyenziswa ngokuqhelekileyo;
2. Iipropathi ezigqwesileyo zoomatshini, kubandakanya ukomelela, amandla acinezelayo, kunye nokuqina, ukuqina okubalaseleyo kunye nokumelana nokudinwa. Ihinge esebenzayo eyenziwe ngePP inokumelana ngaphezu kwe-7 × 107 ukusonga kunye nokugoba ngaphandle komonakalo, kwaye amandla empembelelo kwiqondo lokushisa eliphantsi alibi. Amandla okuqina kwePP ngokuqhelekileyo yi-21-39 MPa; amandla okugoba yi-42-56 MPa, amandla acinezelayo yi-39-56 MPa, i-elongation ngexesha lekhefu yi-200% ~ 400%, kwaye amandla empembelelo yenotshi yi-2.2-5 kJ / m2. Amandla empembelelo yenotshi yobushushu obuphantsi yi-1-2 kJ/m2. Ukuqina kwe-Rockwell R95~105
3. Ukumelana nobushushu obuhle, ubushushu bokusetyenziswa okuqhubekayo bunokufikelela kwi-110-120 ℃
4. Uzinzo oluhle lweekhemikhali, ngaphandle kwe-oxidants eyomeleleyo, ayisebenzi kunye namachiza amaninzi ekhemikhali. Izinyibilikisi azikwazi ukunyibilikisa i-PP kwiqondo lobushushu begumbi, kuphela ezinye iikhompawundi ezine-halogenated, ii-hydrocarbons ezinevumba elimnandi, kunye ne-high-billing-point-fatty hydrocarbons ezinokubangela ukudumba. Inokumelana namanzi ngokukodwa;
5. Iipropati zombane ezigqwesileyo, iindawo zokugquma umbane ezikwi-frequency ephezulu, kunye neepropathi ezilungileyo zokugquma umbane kwindawo ezifumileyo;
6. Ngenxa yobukho beathom ezininzi ze-methylated tertiary carbon atom kwikhonkco eliphambili lePP, i-hydrogen kwi-athomu yekhabhoni ephezulu ihlaselwa lula yioksijini, ngoko ke ukumelana nemozulu kunye nokuchasana nokuguga kwe-PP akubi kakhulu, kwaye i-antioxidants okanye i-absorber ultraviolet kufuneka yongezwe. ;
7. Iigundane zilawulwa ngomlomo kunye ne-8g / kg ye-dose ye-1-5 amaxesha, kwaye akukho zimpawu ezicacileyo ezinobuthi zabonwa. Iigundane ziphefumle iimveliso zokubola ze-polypropylene ezishushu kwi-210-220 ℃ ngamaxesha angama-30, iiyure ze-2 ngexesha ngalinye, kwaye zibonise iimpawu ze-eye mucosa kunye nokucaphuka kwendlela yokuphefumula ephezulu. Akuvumelekanga ukusebenzisa iimveliso ezihlaziyiweyo ze-polypropylene ukupakisha ukutya, okufana ne-polyethylene.