Muab piv rau cov ntawv xov xwm tshiab, cov tshuab fais fab tshiab muaj zog ntau dua ntawm cov kev siv phom, cov tub rog, kev tiv thaiv, tsheb, tsheb thauj khoom, cov khoom siv kho mob, cov khoom siv ua si thiab lwm thaj chaw vim lawv lub cev nyhav, siab zog thiab kev ua tau zoo heev. Polypropylene (PP), ib qho ntawm tsib hom-hom thermoplastic resins, yog thib ob tsuas yog mus rau polyethylene thiab polyvinyl chloride, thiab tau dhau los ua tus ceev ceev loj hlob general-purpose yas. Txawm li cas los xij, PP tseem muaj qee qhov kev tsis txaus siab, xws li qis siab thaum lub sijhawm ua haujlwm, qis toughness thiab feem zog ntawm qis dua, thiab kev laus. Nrog kev txhim kho ntawm txhua yam khoom siv ntawm cov ntaub ntawv nyob rau hauv daim ntawv sau tshiab thiab lub sijhawm, kev tsim cov tshiab kev ua tiav polypropylene cov ntaub ntawv tau ua ib qho tseem ceeb ntawm kev tshawb fawb hauv daim teb no.
α Schematic daim duab ntawm kev tsim cov tshuaj polypropylene tshiab los ntawm kev hloov kho ntawm α ser nucleating nrog rau cov iav fiber reinforcement
β Schematic daim duab ntawm lub mechanism ntawm nucleating tus neeg saib xyuas cov cwj pwm sib xyaw ua ke nrog nrog cov iav fiber reinforcement lug txhim khu qhov adhesion ntawm fiber ntau thiab matrix pob zeb
Inspired los ntawm fiber ntau reinforcement thiab theem transformation toughening ntawm bio-pob hloov ntaub ntawv, Zhang Yagang Research Team ntawm Department of Resource Chemistry, Xinjiang lub koom haum Physics thiab Chemistry, Suav Academy of Sciences creatively nrog cov fiber ntau reinforced thiab nucleating tus neeg sawv cev los tswj cov crystallization cwj pwm ntawm polypropylene. Ib tug tshiab mus kom ze rau polypropylene composites tshiab. Cov qauv no yog tsim los ntawm cov txheej txheem ob-kauj ruam ntawm polypropylene, ib qho tshuaj sib txuas, ib lub iav fiber, ib tus neeg saib xyuas nucleating thiab antioxidant. Ua ntej, ib tug nucleating tus neeg siv yog siv los ntxias nucleation ntawm polypropylene, thiab ces lub khob fiber ntau nrog cov iav fiber rau ntxiv ua. Txoj kev kho kom zoo tshaj qhov teeb meem ntawm kev sib txuas ncaj qha polypropylene nrog nucleating tus neeg sawv cev thiab fiber nyob rau hauv txoj kev cai. Vim qhov kev taw qhia ntawm iav fiber li ib lub teb chaws impurity, tus neeg sawv cev nucleating yuav tsis siv nws txoj haujlwm ntawm regulating tus cwj pwm ntawm crystallization polypropylene. .
Thawj thawj zaug, qhov kev tshawb fawb ua hauj lwm tau tshawb xyuas cov teebmeem ntawm tus neeg sib txawv najleating thiab cov iav fib fab sib xyaw ua ke ntawm kev tsim cov polypropylene composites. Tib lub sij hawm, cov nyhuv ntawm cov khoom xyaw cov nucleating rau ntawm cov khoom siv hluav taws xob ntawm polypropylene composites yog tshawb xyuas. PP ua tau ib qho nyuaj tawv alpha nucleating agent / iav fiber ntau ua ke thiab qhov zoo tshaj formulation. Cov kev tshawb fawb tau tshwm sim tsis ntev los no luam tawm nyob rau hauv phau ntawv journal Journal of Applied Polymer Science.
Tsis tas li ntawd, cov neeg tshawb xyuas tseem kuaj xyuas thawj zaug rau cov teeb meem ntawm iav fiber reinforced thiab tus cwj nucleating tus cwj mem crystallization cwj pwm ntawm cov cwj pwm ntawm crystallization thiab cov khoom sib txuas lus ntawm PP hloov hauv polypropylene composites. Lub mechanism ntawm cov adhesion ntawm cov reinforcing fibre thiab matrix rein tau pom tias yuav tau them nyiaj yug rau qhov poob ntawm txoj haujlwm ntawm PP los ntawm kev hloov ntawm tus neeg saib xyuas β nucleating thiab txhim kho nws cov khoom siv txhua yam. Cov kev tshawb fawb tau tshwm sim tsis ntev los no luam tawm nyob rau hauv phau ntawv journal thoob ntiaj teb Kev Txhim Kho ntawm lub Vaj Huam Sib Luag Hwm ntawm Kev Sib Haum (RSCAdvances).
Cov kev tshawb fawb tshwm sim "ib txoj kev npaj ntawm polypropylene ntaub ntawv" tau ua ntawv thov rau ib lub teb chaws patent. Txoj kev no muab cov cwj pwm ntawm crystallization ntawm ob lub series ntawm cov neeg ua haujlwm nucleating α thiab β nrog iav fiber ntau los ua ib qho khoom siv hluav taws xob polypropylene. Polypropylene composites nrog balanced rigidity thiab toughness tau npaj, uas yog muab ib lub tswv yim tshiab thiab txoj kev los tsim cov qauv tshuaj polypropylene tshiab.
