Rheological Behaviors of Polypropylene/Poly(1-butene) Blends. Issue 9 (2nd September 2018)

• Record Type: Journal Article
• Authors: Shao, Huafeng; Wang, Shulei; Dong, Xia; He, Aihua
• Is Part Of: Journal of macromolecular science. Volume 57:Issue 9(2018)
• Page Start: 608
• Page End: 623
• Publication Date: 2018-09-02
• Subjects: Polypropylene -- poly(1-butene) -- blends -- rheological behavior -- mechanical properties; Polymerization -- Periodicals; Polymers -- Periodicals; 530.413
• DOI: 10.1080/00222348.2018.1500104
• Languages: English
• ISSNs: 0022-2348

Abstract

Abstract: The rheological behaviors of polypropylene (PP)/poly(1-butene) (PB) blends with homo-polypropylene (PP1 ) or impact polypropylene (PP2 ), a poly(propylene- co -ethylene) as the PP component were studied. With increasing of PB resin content for both PP/PB blends, the blends showed higher G '(ω), G ''(ω) and η *(ω) at low frequencies but lower values at high frequencies which implied that the processability was improved. A two-phase morphology was observed through the various rheological responses, including G '(ω)- ω terminal region curves, Cole-Cole plots and the weighted relaxation spectra with the PB contents up to 40 wt%. With the same PB content, the rheological parameters of the PP2 /PB blends were quite different from those of the PP1 /PB, which can be attributed to the stronger interaction between PB chains and the ethylene- co -propylene copolymer in PP2 . The impact strength of the PP2 /PB blends was improved dramatically over that of the PP1 /PB. The more significant toughening effect for the PP2 /PB blends can be attributed to the special responses of its rheological behaviors.