Mechanical Properties of Plasma Surface-Modified Calcium Carbonate-Polypropylene Composites

1997 ◽  
Vol 42 (2) ◽  
pp. 195-202 ◽  
Author(s):  
G. Akovali ◽  
M. A. Akman
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Plasma Surface ◽  
Polypropylene Composites ◽  
Surface Modified

scholarly journals Influence of the Surface Modification of Calcium Carbonate on Polyamide 12 Composites

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1295
Author(s):  
Fabio Ippolito ◽  
Gunter Hübner ◽  
Tim Claypole ◽  
Patrick Gane
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Calcium Carbonate ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Hexanoic Acid ◽  
Mineral Filler ◽  
Polyamide 12 ◽  
Twin Screw ◽  
Surface Modified

In previous investigations, it was found that the thermal properties of a polyamide 12 compound can be manipulated, using a designed filler, to improve the melting as well as crystallization behavior, determined for selective laser sintering. A common downside of the introduction of a non-flexing mineral filler is the reduction of the mechanical properties, such as ductility. This paper investigates the influence of content and surface modification of limestone on the mechanical properties. The aim is to understand the effect of an optimized coupling agent on the properties of a compound, containing polyamide 12 filled with 10 wt % of surface modified calcium carbonate. A range of four mineral filler modifications was chosen to investigate their coupling effect, namely 6-amino hexanoic acid, ε-caprolactam, l-arginine or glutamic acid. The in advance surface modified fillers were then each used in combination with the polyamide 12 in a twin-screw extrusion process. With an optimized surface modifying agent, the tensile strength as well as elongation at break can be improved in comparison with uncoated filler implementation, such that up to 60% of the loss of ductility and toughness of a final part when using an untreated filler could be regained using an optimized surface modifier at a correct amount. With the tested filler grade and the specific tested filler amount, the optimized amount of 6-amino hexanoic acid was approx. 2.5 mmol of treatment agent per 100 m2 of CaCO3. These found improvements in a twin-screw extruded polyamide 12 compound show the possible usage of modified calcium carbonate as a functional filler in additive manufacturing and can potentially be transferred in a subsequent investigation in the selective laser sintering process.

Mechanical properties of calcium carbonate/eggshell particle filled polypropylene Composites

MRS Advances ◽  
2020 ◽  
Vol 5 (54-55) ◽  
pp. 2783-2792
Author(s):  
Kabiru Mustapha ◽  
Rashidat Ayinla ◽  
Abdulraman Sikiru Ottan ◽  
Tunji Adetayo Owoseni
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Polymer Matrix Composites ◽  
Microstructural Analysis ◽  
Testing Machine ◽  
Modulus Of Rupture ◽  
Uniaxial Tensile ◽  
Indentation Hardness ◽  
Polypropylene Composites ◽  
Hardness Tester

AbstractCalcium carbonate is widely used as a filler material in the production of polymer matrix composites and studies have shown that eggshell contains about 94% calcium carbonate. The effect of calcium carbonate from eggshell particles in polypropylene was studied in this work and the result compared with unreinforced polypropylene. Industrially synthesized calcium carbonate/eggshell particles were used as filler in polypropylene matrix with varying mass fractions from 5 to 20 wt. % at 5 wt. % increment. The produced samples were mechanically characterized for indentation hardness and uniaxial tensile properties using a Rockwell hardness tester and universal mechanical testing machine respectively. These properties were measured at different compositions to determine its compositional dependence. Microstructural analysis of the composites top and fracture surface was also carried out using scanning electron microscope to examine possible failure mode. The results were compared to measure the effect of reinforcement and the replacement criteria for the conventional calcium carbonate. The results obtained showed that calcium carbonate reinforced polypropylene has its highest tensile strength, elastic modulus and modulus of rupture at 5 wt. %, ductility and modulus of resilience at 10 wt. %, and hardness at 15 wt. %. The results also showed that granulated eggshell can provided appreciable improvement in the mechanical properties of polypropylene as obtainable in mineral calcium carbonate reinforced polypropylene.

Preparation of Polypropylene Composites Filled with Surface-modified Calcium Carbonate byin-situSolid Phase Grafting

2013 ◽  
Vol 30 (12) ◽  
pp. 1411
Author(s):  
Deqin ZHU ◽  
Yu SHENG ◽  
Yinjiang ZOU ◽  
Zhen FANG ◽  
Xiaofen SU
Keyword(s):  
Calcium Carbonate ◽  
Polypropylene Composites ◽  
Surface Modified

scholarly journals Analysis of PLA Composite Filaments Reinforced with Lignin and Polymerised-Lignin-Treated NFC

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2174
Author(s):  
Diana Gregor-Svetec ◽  
Mirjam Leskovšek ◽  
Blaž Leskovar ◽  
Urška Stanković Elesini ◽  
Urška Vrabič-Brodnjak
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Glassy State ◽  
Nanofibrillated Cellulose ◽  
Dynamic Mechanical Properties ◽  
Initial Modulus ◽  
Surface Modified ◽  
Scanning Electron

Polylactic acid (PLA) is one of the most suitable materials for 3D printing. Blending with nanoparticles improves some of its properties, broadening its application possibilities. The article presents a study of composite PLA matrix filaments with added unmodified and lignin/polymerised lignin surface-modified nanofibrillated cellulose (NFC). The influence of untreated and surface-modified NFC on morphological, mechanical, technological, infrared spectroscopic, and dynamic mechanical properties was evaluated for different groups of samples. As determined by the stereo and scanning electron microscopy, the unmodified and surface-modified NFCs with lignin and polymerised lignin were present in the form of plate-shaped agglomerates. The addition of NFC slightly reduced the filaments’ tensile strength, stretchability, and ability to absorb energy, while in contrast, the initial modulus slightly improved. By adding NFC to the PLA matrix, the bending storage modulus (E’) decreased slightly at lower temperatures, especially in the PLA samples with 3 wt% and 5 wt% NFC. When NFC was modified with lignin and polymerised lignin, an increase in E’ was noticed, especially in the glassy state.

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