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The structure and property relationships of propylene-1-octene random copolymer having different octene comonomer concentrations were investigated. In specific, the crystal structure evolution in these copolymers during uniaxial stretching at 60 °C was characterized by in-situ synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) techniques. With high octene content,...
The influence of temperature on the crystallization process of isotactic propylene-1-butylene (P–B) random copolymer with low comonomer concentration subjected to uniaxial tensile force was studied in-situ by using synchrotron-based wide- and small-angle X-ray scattering techniques (WAXS/SAXS). Data analysis was performed on the whole-pattern base. P–B copolymer was stretched at three temperatures,...
An ionic liquid (IL) 1-docosanyl-3-methylimidazolium bromide was incorporated into ultra-high molecular weight polyethylene (UHMWPE) and formed IL/UHMWPE blends by solution mixing. The structure evolution of these blends during uniaxial stretching was followed by in-situ synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) techniques. During deformation at room temperature,...
Changes in the mechanical properties of amorphous polycarbonate during the fatigue failure initiation stage lead to overall embrittlement of the polymer. The results indicate that the fracture toughness of the material can be reduced by ∼ 35% without visible damage. The ‘static’ mechanical characteristics, such as yield stress and strain and absorbed energy, are influenced very modestly by the cyclic...
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