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Tytuł pozycji:

Novel dynamic elongational flow procedure for reinforcing strong, tough, thermally stable polypropylene/thermoplastic polyurethane blends.

Tytuł :
Novel dynamic elongational flow procedure for reinforcing strong, tough, thermally stable polypropylene/thermoplastic polyurethane blends.
Autorzy :
Jia S; National Engineering Research Center of Novel Equipment for Polymer Processing, Key Laboratory of Polymer Processing Engineering of the Ministry of Education, South China University of Technology , Guangzhou 510640, China.
Qu J
Wu C
Liu W
Chen R
Zhai S
Huang Z
Chen F
Pokaż więcej
Źródło :
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2013 Nov 05; Vol. 29 (44), pp. 13509-17. Date of Electronic Publication: 2013 Oct 24.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: Washington, DC : American Chemical Society, c1985-
Entry Date(s) :
Date Created: 20130928 Date Completed: 20140605 Latest Revision: 20131105
Update Code :
20211220
DOI :
10.1021/la4023079
PMID :
24070497
Czasopismo naukowe
Thermoplastic polyurethane (TPU)/polypropylene (PP) blends of different weight ratios were prepared with a self-made vane extruder (VE), which generates global dynamic elongational flow, and a traditional twin-screw extruder (TSE), which generates shear flow. High-resolution scanning electron microscopy and polarizing microscopy showed a structure feature of fiber morphology and a clear interlocking structure of spherulites of PP/TPU blends prepared with a VE. The wide-angle X-ray diffraction results showed that the TPU/PP blend based on dynamic elongational flow had evident crystalline structure of the β form as a function of PP (90 wt %), compared to that of the conventional shear flow processing techniques. A significant improvement of the mechanical properties was obtained; the samples prepared with a VE had superior mechanical properties compared to those of the samples prepared with a TSE. Interestingly, differential scanning calorimetry curves showed that dynamic elongational flow could successfully improve the crystallinity of the PP/TPU blends. Furthermore, dynamic thermomechanical and thermogravimetric analysis curves revealed the apparent partial miscibility and strong interaction of the PP/TPU blends influenced by dynamic elongational flow, compared to that of TSE-extruded. Further research will provide significant understanding of the spherulite interface and high-performance manipulation of PP/TPU blends under dynamic elongational flow, achieving superior PP/TPU blends.

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