scholarly journals Morphology and mechanical properties of polyamide 12 (PA12)/poly(vinylidene fluoride) (PVDF) blends

2009 ◽  
Vol 11 (3) ◽  
pp. 27-34 ◽  
Author(s):  
Aleksandra Ratajska ◽  
Wojciech Kulak ◽  
Artur Poeppel ◽  
Andreas Seyler ◽  
Zbigniew Roslaniec
Keyword(s):  
Mechanical Properties ◽  
Vinylidene Fluoride ◽  
Polymeric Materials ◽  
Scanning Calorimetry ◽  
Crystalline Polymers ◽  
Polyamide 12 ◽  
Poly Vinylidene Fluoride ◽  
Static Tensile ◽  
Internal Mixer ◽  
Morphology And Mechanical Properties

Morphology and mechanical properties of polyamide 12 (PA12)/poly(vinylidene fluoride) (PVDF) blends The morphology, thermal and mechanical properties of polyamide 12 (PA12)/poly(vinylidene fluoride) (PVDF) blends were investigated. These polymers are engineering, semi-crystalline polymers which are reciprocally immiscible. Differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and scanning electron microscopy (SEM) were used to characterize the polymeric materials. Mechanical properties were examined by static tensile test. The investigations demonstrate that blends with higher amount of PVDF, with the morphology of two co-continuous semicristalline phases, exhibit better mechanical properties. The blends with small content of PVDF and prepared by extrusion show the morphology of small separated domains of PVDF and full continuous PA phase. The morphology of these blends is different than the blends prepared by internal mixer and have better mechanical properties too. Thus they can be used in particular applications without a compatibilizing agent.

scholarly journals Effect of Poling on the Mechanical Properties of β-Poly(Vinylidene Fluoride)

2006 ◽  
Vol 514-516 ◽  
pp. 951-955 ◽  
Author(s):  
Carlos M. Costa ◽  
Vitor Sencadas ◽  
João F. Mano ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Vinylidene Fluoride ◽  
Degree Of Crystallinity ◽  
Scanning Calorimetry ◽  
Direction Parallel ◽  
Poly Vinylidene Fluoride ◽  
The Stability ◽  
Kinetics Of ◽  
The Degree Of Crystallinity

In this work, mechanical and thermal experimental techniques have been applied in order to relate the mechanical response with the microscopic variations of the material. Stress-strain results along the main directions of β-poly(vinylidene fluoride), β-PVDF, in poled and non-poled samples enables to investigate the influence of the poling process on the mechanical response of the material. Further, differential scanning calorimetry experiments allow the investigation of the effect of poling in the degree of crystallinity of the material as well as on the stability of the crystalline phase. Thermogravimetric analysis was used to investigate the kinetics of the thermal degradation of poled and non-poled β-PVDF samples. The differences observed between the two materials suggest that the poling affects the mechanical properties of the material especially in the direction parallel to the polymeric chains and originates changes at a molecular level that remain beyond the melting of the material.

Determination of Morphology and Mechanical Properties of Polyhedral Oligomeric Silsequioxane (POSS) Based on Poly(vinylidene fluoride) Matrix

2013 ◽  
Vol 422 ◽  
pp. 15-19
Author(s):  
Yi Zhi Liu ◽  
Yi Sun ◽  
Fan Lin Zeng ◽  
Jing Cang Liu
Keyword(s):  
Mechanical Properties ◽  
Positive Reinforcement ◽  
Vinylidene Fluoride ◽  
Mechanical Analysis ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Reinforcing Agent ◽  
Poly Vinylidene Fluoride ◽  
Pvdf Matrix ◽  
Morphology And Mechanical Properties

In this paper, different amounts of fluoropropyl polyhedral oligomeric silsesquioxanes (FP-POSS) were incorporated into the poly (vinylidene fluoride) (PVDF) matrix by the solvent evaporation method. Influence of FP-POSS on morphology and mechanical properties of PVDF matrix was investigated. Good dispersion between FP-POSS and PVDF was achieved up to 8 wt% of nanofiller. The mechanical testing and dynamic mechanical analysis showed that low FP-POSS content induced a positive reinforcement effect on mechanical property in the formed composites. The results also indicated the existence of the optimal formula for producing POSS polymer composites, and POSS owning to its unique organic-inorganic structure can act as a plasticizer or as a reinforcing agent on the basis of interactions between filler and polymer.

scholarly journals A method for pet mechanical properties enhancement

2019 ◽  
Vol 10 (8) ◽  
pp. 1725
Author(s):  
Raffaella Aversa ◽  
Relly Victoria Virgil Petrescu ◽  
Antonio Apicella ◽  
Florian Ion Tiberiu Petrescu
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Molecular Structures ◽  
Reactive Blending ◽  
Scanning Calorimetry ◽  
Shear Transfer ◽  
Crystalline Polymers ◽  
Reactive Compatibilizer

A method for PET mechanical properties enhancement by reactive blending with HBA/HNA Liquid Crystalline Polymers for in situ highly fibrillar composites preparation is presented. LCP/PET blends were reactively extruded in presence of Pyromellitic Di-Anhydride (PMDA) and then characterized by Differential Scanning Calorimetry, Thermally Stimulated Currents and tensile mechanical properties. Moderate amounts of LCP in the PET (0.5 and 5%) and small amounts of thermo-active and reactive compatibilizer in the blend (0.3%) were found to significantly improve LCP melt dispersion, melts shear transfer and LCP fibril formation and adhesion. An unexpected improvement was probably due to the presence of two distinct phases’ supra-molecular structures involving PET-LCP and PMDA.

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