scholarly journals Tensile Properties of Polypropylene Filled with Nanoscale Calcium Carbonate Particles

2002 ◽  
Vol 11 (6) ◽  
pp. 096369350201100 ◽  
Author(s):  
Ming Qiu Zhang ◽  
Min Zhi Rong ◽  
Shun Long Pan ◽  
Klaus Friedrich
Keyword(s):  
Calcium Carbonate ◽  
Tensile Properties ◽  
Introduced Species ◽  
Tensile Testing ◽  
Filler Content ◽  
Polypropylene Composites ◽  
Matrix Polymer ◽  
Modification Effect ◽  
The Matrix ◽  
Positive Effect

To bring the positive effect of nanoscale calcium carbonate into play, macromolecular chains were introduced onto the particles by irradiation grafting polymerisation so that the hydrophobicity of the particles was increased and the loosen agglomerates became stronger. Tensile testing results demonstrated that polypropylene composites incorporated with the grafted nano-CaCO3 particles exhibited improved stiffness, strength and toughness at low filler content when proper grafting polymers are introduced. Species of grafting polymers adhered to the nanoparticles is an important factor affecting the modification effect of the matrix polymer. Therefore, composites performance can be purposely tailored accordingly.

Effect of Two-Stage Aging on Microstructure and Properties of Al-Mg-Si Alloys

2022 ◽  
Vol 905 ◽  
pp. 51-55
Author(s):  
Li Wang ◽  
Ya Ya Zheng ◽  
Shi Hu Hu
Keyword(s):  
Growth Rate ◽  
Grain Boundary ◽  
Tensile Properties ◽  
Tensile Testing ◽  
Diffusion Rate ◽  
Two Stage ◽  
Precipitated Phase ◽  
Transmission Electron ◽  
The Matrix ◽  
Microstructure Characteristic

The effects of two-stage aging on the microstructures, tensile properties and intergranular corrosion (IGC) sensitivity of Al-Mg-Si alloys were studied by tensile testing and IGC experiments and transmission electron microscope (TEM). The results show that the two-stage aging (180°C, 2h+160°C, 120h) can reduce the IGC sensitivity without decrease the tensile properties. The grain is distributed with high-density β′′ phases, and the grain boundary phases are spherical and intermittently distributed. The formation of the microstructure characteristic is due to the lower re-aging temperature, which results in a decline differences in the diffusion rate between the matrix and grain boundaries. As a result, the pre-precipitated phase can maintain a better strengthening effects due to the slower growth rate. The pre-precipitated phase of the grain boundary presents a spherical and intermittent distribution due to the fast coarsening speed.

Effect of graphene nano-platelets on mechanical and impact characteristics of carbon/Kevlar reinforced epoxy hybrid nanocomposites

2021 ◽  
pp. 095440622110168
Author(s):  
Mohamad Alsaadi ◽  
Bashar Younus ◽  
Ahmet Erklig ◽  
Mehmet Bulut ◽  
Omer Bozkurt ◽  
...  
Keyword(s):  
Impact Test ◽  
Charpy Impact ◽  
Hybrid Nanocomposites ◽  
Matrix Composites ◽  
Sem Images ◽  
The Matrix ◽  
Impact Characteristics ◽  
Positive Effect ◽  
Hybrid Carbon ◽  
Composite Samples

The influence of various graphene nano-platelets (GNPs) content on the tensile, flexural and Charpy impact characteristics of carbon, Kevlar and hybrid carbon/Kevlar fibers reinforced epoxy matrix composites was investigated. Both of composite configurations as carbon and Kevlar at outer and core skins were experimentally tested. The SEM images for flexural specimens were taken to observe the adhesion mechanism of GnPs particles with fiber/epoxy system. It is found that hybridization with Kevlar layers is contributed a positive effect on the hybrid carbon/Kevlar laminate structures in terms of tensile, flexural and impact behaviour. The incorporation of GnPs particles in hybrid and non-hybrid composite samples results in significant improvements in tensile, flexural and impact properties, and the greatest improvement occurs within the GnPs particle content of 0.1 and 0.25 wt%, indicating that the interfacial bonding between the matrix and the fibers is better due to the large surface area of the GnPs and the good entanglement between the GnPs layers and the matrix chains. The samples of impact test are experimented for edgewise and flatwise directions.

Development of bamboo polymer composites with improved impact resistance

2021 ◽  
pp. 096739112110093
Author(s):  
RM Abhilash ◽  
GS Venkatesh ◽  
Shakti Singh Chauhan
Keyword(s):  
Impact Strength ◽  
Flexural Strength ◽  
Polymer Composites ◽  
Impact Resistance ◽  
Adverse Impact ◽  
Matrix Polymer ◽  
Bamboo Fibre ◽  
The Matrix ◽  
Major Criterion ◽  
Pp Composites

Reinforcing thermoplastic polymers with natural fibres tends to improve tensile and flexural strength but adversely affect elongation and impact strength. This limits the application of such composites where toughness is a major criterion. In the present work, bamboo fibre reinforced polypropylene (PP) composites were prepared with bamboo fibre content varying from 30% to 50% with improved impact resistance. Homopolymer and copolymer PP were used as the matrix polymer and an elastomer was used (10% by wt.) as an additive in the formulation. Copolymer based composites exhibited superior elongation and impact strength as compared to homopolymer based composites. The adverse impact of elastomer on tensile and flexural strength was more pronounced in homopolymer based composites. The study suggested that the properties of the bamboo composites can be tailored to suit different applications by varying reinforcement and elastomer percentage.

Preparation and characterization of nano/micro-calcium carbonate particles/polypropylene composites

2010 ◽  
Vol 119 (6) ◽  
pp. 3560-3565 ◽  
Author(s):  
Jun Zhang ◽  
Bing Han ◽  
Ning-Lin Zhou ◽  
Jue Fang ◽  
Juan Wu ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Polypropylene Composites

scholarly journals Polylactic acid (PLA) based green composites reinforced pineapple leaf fibres: evaluation of processing and tensile performance

2018 ◽  
Vol 192 ◽  
pp. 03002
Author(s):  
Jedsada Chaishome ◽  
Suriyan Supapvanich
Keyword(s):  
Tensile Properties ◽  
Polylactic Acid ◽  
Detrimental Effect ◽  
Process Variables ◽  
Compression Moulding ◽  
Stiffness Modulus ◽  
Vacuum Forming ◽  
Tensile Performance ◽  
The Matrix ◽  
Consolidation Temperature

This paper reports on a study of the compression moulding and the vacuum forming of unidirectional pineapple leaf fibres/polylactic acid composites and the influence of process variables on the tensile properties of the material. The characterisation of the micro and meso structures of the pineapple leaf fibres is reported. The effect of consolidation temperature on the fibre thermal stability and the tensile properties of the composites is investigated. The results show that vacuum forming was found to be preferable process with high stiffness modulus and UTS of the composites, compared to compression moulding. The insignificant detrimental effect of 165°C high consolidation temperature was observed. Finally, the fibre thermal degradation seems to dominate the composite tensile performance over its interfacial quality between the fibre and the matrix.

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