کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1883708 | 1533537 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The role of PB-1 on the long chain branching of PP by electron beam irradiation in solid state and melt viscoelastic behavior The role of PB-1 on the long chain branching of PP by electron beam irradiation in solid state and melt viscoelastic behavior](/preview/png/1883708.png)
In this study, a long-chain branched polypropylene (LCB PP) was prepared by electron beam irradiation in the presence of polybutene-1 (PB-1) and a trifunctional monomer, trimethylolpropane trimethacrylate (TMPTMA). The effect of PB-1 on branching is evaluated by measuring the viscoelastic behavior in shear and extensional mode of deformation. Long-chain branched structure showed prominent higher zero-shear viscosity (η0) and storage modulus (G′), longer relaxation time and pronounced strain-hardening behaviors. It is found that 10 wt% of PB-1 resin in PP matrix increase the efficiency of branching process which can be due to the effect of PB-1 resin in facilitating the mobility of macro-radicals generated during irradiation. At higher percentages, due to the high tendency of PB-1 resin to β-scission, the degradation reaction is more pronounced than its mobilizing effect in branching process.
► The effect of PB-1 in branching of PP by electron beam irradiation is studied.
► PB-1 promoted long chain branching of PP in solid state.
► Using 10 wt% PB-1 in PP matrix increased the branching efficiency as a mobilizer.
► At 20 wt% of PB-1 the degradation reactions were dominated to branching process.
Journal: Radiation Physics and Chemistry - Volume 87, June 2013, Pages 64–70