Influence of PP‐g‐MA on morphology, mechanical properties and deformation mechanism of copolypropylene/clay nanocomposite

Abstract

Copolypropylene/organoclay nanocomposites are prepared by melt intercalation method in this research. Two different routes for addition of compatibilizer are examined, i.e. addition in the twin‐screw extruder along with the polymer and the clay powder simultaneously and premixing the compatibilizer with the reinforcement in a batch mixer before addition to the polypropylene (PP) matrix. Morphology, tensile and impact properties and deformation mechanisms of the samples made via two procedures are studied and compared with those of the noncompatibilized system. To study the structure of nanocomposites, x‐ray diffraction and transmission electron microscopy techniques are utilized. The deformation mechanisms of different samples are examined via reflected and transmitted optical microscopy. The results reveal that introduction of compatibilizer and also the procedure in which the compatibilizer is added to the compound, affect structure and mechanical properties of nanocomposite. The elastic modulus of PP‐clay nanocomposite has increased 11.5% with incorporation of compatibilizer. Also, introduction of organoclay without compatibilizer facilitates crazing at the notch tip of PP in 3PB testing. Incorporation of compatibilizer, however, makes difficulties in initiation and growth of crazes at the notch tip. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

Effect of multiple extrusions on the impact properties of polypropylene/clay nanocomposites

“…In addition to the mechanical response, active research includes permeability, flammability, and thermal stability 1–3. The reported improvements in the mechanical response have primarily focused on increased strength and stiffness in the ranges of 5–25 and 5–50%, respectively, whereas the corresponding impact properties have been less consistent, ranging from a decrease of 30% to an increase of 100% 4–7. In industrial applications, polymer impact properties are a very important parameter, and tailoring composite mechanical responses with the use of nanoparticles should be done with this in mind.…”

Semi‐Crystalline Polymer Blends for Material Extrusion Additive Manufacturing Printability: A Case Study with Poly(ethylene terephthalate) and Polypropylene

“…Other researchers report conflicting trends when using PP‐g‐MA as a PET/PP compatibilizer. Some results indicate PP‐g‐MA improves ultimate tensile properties and others indicate a decrease in the mechanical properties particularly as the loading concentration increases . A third possibility is due to flaws in the FFF printed structure dominating the failure in tension over any failure at the domain boundary between phase‐separated regions.…”

Study on Tensile Strength, Impact Strength and Analytical Model for Heat Generation in Friction Vibration Joining of Polymeric Nanocomposite Joints

“…The new idea for joining PP/C30B/ EA nanocomposite is realized through FVJ process and FVJ setup was fabricated. The experiments were conducted according to Taguchi design of experiments with input parameters like tool profile (cylindrical, square and triangle), the frequency of the vibrating tool (14,18,and 22 Hz) and the feed rate of workpiece (6,12, and 18 mm/min) was used to study the tensile and impact strength of the FVJ processed PP/C30B/EA nanocomposite. The analytical heat generation was modeled and the heat generated during the FVJ process was calculated for different tool profiles which were in the processing range of PP.…”