Tensile Properties Of Polypropylene Composites Research Articles

Tensile Properties of Polypropylene Composites Reinforced with Alumina Nanoparticles and Short Carbon Fibers

Tensile Properties of Polypropylene Composites Reinforced with Alumina Nanoparticles and Short Carbon Fibers

Tensile properties of polypropylene composites containing cellulose fibers with different diameter

Tensile properties of polypropylene composites containing cellulose fibers with different diameter

Effects of graphene nano-platelets size and content on tensile properties of polypropylene composites at higher tension rate

The influence of graphene nano-platelets size and content on tensile properties of polypropylene composites was investigated by means of a universal testing machine under room temperature and tension rate 300 mm/min. The results showed that the Young’s modulus increased with increasing graphene nano-platelets weight fraction, the tensile yield strength and the tensile fracture strength increased when graphene nano-platelets weight fraction was lower than 0.4 wt.%, and then varied slightly with increasing graphene nano-platelets weight fraction; while the tensile elongation at break decreased with increasing graphene nano-platelets weight fraction. In addition, the difference in tensile yield strength, tensile fracture strength, and tensile elongation at break between the composites reinforced separately with different size graphene nano-platelets was not significant under these experimental conditions; this could be attributed to the interfacial layer between the filler and the matrix could transfer some stress under tensile load.

블록 공중합체로 표면처리된 탄소섬유가 폴리프로필렌 복합재료의 인장 특성에 미치는 영향 연구

블록 공중합체로 표면처리된 탄소섬유가 폴리프로필렌 복합재료의 인장 특성에 미치는 영향 연구

Tensile Properties of Polypropylene Composites Reinforced with Mechanical, Thermomechanical, and Chemi-Thermomechanical Pulps from Orange Pruning

This paper explores the evolution in the tensile strength of orange pruning fiber-reinforced polypropylene composites. The exploitation of these pruning’s can effectively avoid incineration, with the consequence of CO2 emissions and fire risk, while extending the value chain of the agricultural industry. This biomass was subjected to three different treatments yielding mechanical, thermomechanical, and chemi-thermomechanical pulps. It was found that 20 to 50% of these pulps, together with a coupling agent, were used as polypropylene reinforcement. The evolution in the tensile strength and morphological properties of the fibers, and the effect of treatments on these properties were analyzed. A modified rule of mixtures (mROM) was used to analyze the micromechanical properties of the interface. In addition, the mechanical properties were weighted against the fiber treatment yields. Finally, factors to compute the net contribution of the fibers to the final strength of the composite materials were proposed.

Effect of surface coverage of silane treated CaCO3 on the tensile properties of polypropylene composites

AbstractPolypropylene (PP) composites were prepared with a constant volume fraction of a CaCO3 filler, which was treated with eight trialkoxy functional silane coupling agents and the routinely used stearic acid, as comparison, The tensile properties of the composites were determined as a function of surface coverage and the chemical composition of the coupling agent. Significant differences were detected in the effect of the silane coupling agents on the tensile properties of the composites studied. They could be classified into groups of reactive, nonreactive and inactive compounds, in accordance with an earlier study. Moreover, tensile properties proved to be very sensitive to surface treatment. Reactive coupling leads to a maximum in tensile strength, while the use of nonreactive agents decreases strength rapidly with increasing surface coverage. The rate of strength decrease slows down above the concentration necessary for the formation of a monolayer coverage. Treatment influences deformability accordingly, it decreases on reactive coupling, while agents with a surfactant effect increase elongation. Amino functional silanes show a strong reactive coupling effect. A trialkoxy derivative of stearic acid, (3‐stearyloxy‐propyl‐triethoxy‐silane), synthesized the first time in our laboratory, has an outstanding surfactant effect; its use increases both the elongation and the tensile strength of the composites. Both characteristics exceed the corresponding properties of the reference composite containing the filler treated with stearic acid.