scholarly journals Flame retarded self-reinforced polypropylene composites prepared by injection moulding

2017 ◽  
Vol 29 (1) ◽  
pp. 433-441 ◽  
Author(s):  
Dániel Vadas ◽  
Ákos Kmetty ◽  
Tamás Bárány ◽  
György Marosi ◽  
Katalin Bocz
Keyword(s):  
Injection Moulding ◽  
Polypropylene Composites ◽  
Flame Retarded

Extrusion and injection moulding induced degradation of date palm fibre - polypropylene composites

2021 ◽  
pp. 109641
Author(s):  
Sandra Domenek ◽  
Françoise Berzin ◽  
Violette Ducruet ◽  
Cédric Plessis ◽  
Hom Dhakal ◽  
...  
Keyword(s):  
Injection Moulding ◽  
Date Palm ◽  
Polypropylene Composites ◽  
Palm Fibre

Injection moulding unit process for LCA: Energy intensity of manufacturing different materials at different scales

2016 ◽  
Vol 36 (5) ◽  
pp. 338-346 ◽  
Author(s):  
Franziska Hesser ◽  
Matthias Mihalic ◽  
Barbara J Paichl ◽  
Martina Wagner
Keyword(s):  
Injection Moulding ◽  
Energy Intensity ◽  
Process Analysis ◽  
Specific Energy Consumption ◽  
Development Phase ◽  
Environmental Aspects ◽  
Unit Process ◽  
Polypropylene Composites ◽  
Material Development ◽  
Ex Ante

It is not common to accompany material development by a Life Cycle Assessment (LCA) during the research and development phase. It is the aim of the study at hand to present environmental aspects of the manufacturing of different polypropylene composites by injection moulding in comparison to the neat polypropylene. The process analysis following two injection-moulding experiments revealed that the total specific energy consumption of injection moulding of seven different materials and on different scales ranges from 1.6 MJ/kg to 3.5 MJ/kg. On the level of an ex-ante LCA from cradle-to-factory gate, injection moulding can be rated from being a negligible to an important contributor.

Selected Properties and Shrinkage Compensating Effect by Injection Moulding of Origin and Recycled Thermoplastic Composites with Polypropylene (PP) Matrix, Talcum and Glass Fiber

2014 ◽  
Vol 1001 ◽  
pp. 187-193 ◽  
Author(s):  
Aneta Krzyżak ◽  
Marcin Drabik ◽  
Łukasz Zyśko ◽  
Ľudmila Dulebová
Keyword(s):  
Tensile Strength ◽  
Glass Fiber ◽  
Injection Moulding ◽  
Thermoplastic Composites ◽  
Recycling Process ◽  
Polypropylene Composites ◽  
Shrinkage Effect ◽  
Molded Parts ◽  
Injection Molded ◽  
Transverse Shrinkage

This article explains and demonstrates how to first and second injection moulding influence to shrinkage effect of polypropylene composites with talcum and cutting glass fiber. Results show that the longitudinal and transverse shrinkage changed by differend parameters of injection moulding. It was observed shrinkage compensating effect occurring at composite molded parts with a high glass fiber content. Recycling process has reduced the shrinkage and tensile strength. Caused an increase in elongation, but it has not noticed any major changes in the hardness of injection molded parts.

Tensile properties and fire residue morphology of flame-retarded-polypropylene composites

2020 ◽  
pp. 089270572092512
Author(s):  
Ji-Zhao Liang
Keyword(s):  
Flame Retardant ◽  
Tensile Properties ◽  
Flame Retardants ◽  
Volume Fraction ◽  
Tensile Elongation ◽  
Zinc Borate ◽  
Tensile Yield Strength ◽  
Tensile Fracture ◽  
Polypropylene Composites ◽  
Flame Retarded

The polypropylene (PP) composites filled with flame retardants (including aluminum hydroxide (Al(OH)3), magnesium hydroxide (Mg(OH)2), and zinc borate (ZB)) were prepared, and the composites were separately loaded with polyolefin elastomer (POE) and nanometer calcium carbonate (nano-CaCO3). The tensile properties and the fire residue morphology of the specimens after burning for these three groups of composites were measured. The results were shown that the tensile fracture strength and the Young’s modulus increased while the tensile yield strength and the tensile elongation at break ( δ b) decreased with increasing flame-retardant volume fraction. At the same flame-retardant content, the δ b values of the PP/Al(OH)3/Mg(OH)2/ZB/nano-CaCO3/POE composite were the highest in the three groups of composites. The fire residue in the pyrolysis zone of the specimens increased corresponding to the increased flame-retardant volume fraction and with loading the nano-CaCO3 and POE, especially at low-flame-retardant concentration. The reinforcing and the flame-retarded mechanisms of the composites were discussed.

Microcellular Wood Fibre Reinforced Polypropylene Composites in an Injection Moulding Process

2002 ◽  
Vol 21 (6) ◽  
pp. 417-429 ◽  
Author(s):  
Andrzej K. Bledzki ◽  
Omar Faruk
Keyword(s):  
Coupling Agent ◽  
Injection Moulding ◽  
Wood Fibre ◽  
Void Content ◽  
Structure Property ◽  
Moulding Process ◽  
Polypropylene Composites ◽  
Injection Moulding Process ◽  
Added Water ◽  
Foam Properties

Microcellular foams of polypropylene containing wood fibres, cell sizes on the order of 10 to 50 μm were produced by injection moulding. The relationships of processing/structure/property were investigated for wood fibre-thermoplastics composites foaming with a chemical blowing agent. Wood polypropylene composites (WPC) of different wood content (30%, 40%, 50% and 60% by weight) were prepared using maleic anhydride-polypropylene copolymer (5% relative to the wood fibre content) as a coupling agent. Measurement of density, cell size, void content, tensile and flexural test of the prepared WPC were carried out. The shape and distribution of the voids were investigated by optical photo examination of longitudinal sections of specimens, using a polishing technique and reflected light microscopy. The density of foamed composites decreased about 24%. The cell morphology and foam properties showed improvement when the coupling agent was added. Water absorption and scanning electron microscope of the composites also investigated.

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