Effects of wool fibres, ammonium polyphosphate and polymer viscosity on the flammability and mechanical performance of PP/wool composites

Kim, Nam Kyeun; Lin, Richard; Bhattacharyya, Debes

doi:10.1016/j.polymdegradstab.2015.05.015

Cited by 67 publications

(35 citation statements)

References 40 publications

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“…Neat PP, on the other hand, was the least thermally stable as it rapidly decomposed leaving almost no residue. Amongst the four biomasses, wool was found to have the highest amount of residue which was due its charring ability (Kim et al 2015). Rice and coffee husk retained somewhat similar amounts of residues, which was slightly higher than the residues produced by the wood.…”

Section: Resultsmentioning

confidence: 99%

An Attempt to Find a Suitable Biomass for Biochar-Based Polypropylene Biocomposites

Das

Kim

Hedenqvist

et al. 2018

Environmental Management

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Four biomass wastes (rice husk, coffee husk, coarse wool, and landfill wood) were added with biochar and polypropylene (PP) to manufacture biocomposites. Individual biomasses were tested for their combustion behavior using cone calorimeter. Biocomposites were analyzed for their fire/thermal, mechanical, and morphological properties. Wood had the most desirable comprehensive effect on both the mechanical and fire properties of composites. In particular, wood and biochar composite exhibited the highest values of tensile/flexural properties with a relatively low peak heat release rate. In general, application of waste derived biochar and biomasses drastically reduced the susceptibility of neat PP towards fire.

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Section: Resultsmentioning

confidence: 99%

An Attempt to Find a Suitable Biomass for Biochar-Based Polypropylene Biocomposites

Das

Kim

Hedenqvist

et al. 2018

Environmental Management

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“…In this context, the use of natural fibers and particles for the production of polymer-based composites has received great importance [4,5]; in particular, bio-derived fibers, such as cotton [6], flax [7], or jute [8], have been embedded in several polymeric matrices, showing the potential to substitute the fillers traditionally used in polymer composites, also due to their advantageous price–volume–performance relationships [9,10]. However, because of the low thermal stability of natural fibers [11], their use in polymer-based composites has been often problematic; in fact, the degradation of bio-derived fillers occurs in the temperature range typical of polymer processing, and this feature limits the choice of the polymer matrix and significantly limits a successful processing of the composites [12,13]. Additionally, natural fibers show poor compatibility with most polymers, therefore chemical and/or physical treatments of their surface are often mandatory to enhance the polymer/filler interface [14,15]; lastly, a further drawback of bio-derived fibers refers to their high hydrophobicity which restricts their incorporation in moisture sensitive polymeric matrices [16].…”

Section: Introductionmentioning

confidence: 99%

Structure–Property Relationships in Polyethylene-Based Composites Filled with Biochar Derived from Waste Coffee Grounds

et al. 2019

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In this work, biochar (BC) derived from spent coffee grounds has been incorporated into high density polyethylene (PE) through melt mixing. The influence of the filler content on the rheological and thermal behavior of the obtained composites was assessed. In particular, a rheological study was performed systematically using different flow fields, including linear and nonlinear dynamic shear flow, revealing that the dynamics of PE macromolecules in the composite materials are slowed down because of the confinement of the polymer chains onto the filler surface and/or within the BC porous structure. Oscillatory amplitude sweep tests indicated that composites show weak strain overshoot behavior in the nonlinear regime: This finding clearly proves the formation of weak structural complexes, which cause a retardation of the macromolecular chains dynamics. Furthermore, the embedded BC particles were able to improve the thermo-oxidative stability of PE-based composites, remarkably increasing the PE decomposition temperatures.

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“…Kim et al 51 studied the flammability and mechanical performance of PP/WF composite with its dependence on ammonium phosphate and polymer viscosity. Ammonium phosphate (APP) enhances the fire retardancy of the composite.…”

Section: Wfs-reinforced Polymer Compositesmentioning

confidence: 99%

“…SEM micrographs of tensile fractured samples: (a) PP-wool 30 wt% and (b) PP-wool 30 wt% with APP 20 wt% composites (reprinted with permission from Kim et al 51 ).…”

Section: Wfs-reinforced Polymer Compositesmentioning

confidence: 99%

Natural fibres as promising environmental-friendly reinforcements for polymer composites

Karim

Tahir

Haq

et al. 2020

Polymers and Polymer Composites

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Polymer composites are an important class of materials widely being used for many applications. But the main concern of non-degradability and adverse environmental impact of the polymer matrices and the synthetic reinforcements have given forth the need of environmental-friendly polymer matrices and reinforcements used in them. An attempt of such kind is to use the natural plant fibres as the reinforcements that have no harmful impact on the environment and also, they are cost effective. With growing interest in natural fibres in recent years, a lot of work is being done in various directions, which need to be gathered up for a specific interest. So, the present article is an attempt to review and discuss the research works that have evaluated the natural plant fibres as reinforcements in polymer composites. Natural fibre composites show variation of properties such as fibre’s source, type and structure. Interfacial adhesion between the fibre and the matrix is the most important factor when tensile properties of natural fibre composites are under consideration. The interfacial strength can be improved by some chemical modification of fibre surface, which changes the adhesion between fibre and matrix. These features of natural fibres as compared to synthetic fibres are motivating manufacturers and the end users to switch to natural fibre-based products.

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Effects of wool fibres, ammonium polyphosphate and polymer viscosity on the flammability and mechanical performance of PP/wool composites

Cited by 67 publications

References 40 publications

An Attempt to Find a Suitable Biomass for Biochar-Based Polypropylene Biocomposites

An Attempt to Find a Suitable Biomass for Biochar-Based Polypropylene Biocomposites

Structure–Property Relationships in Polyethylene-Based Composites Filled with Biochar Derived from Waste Coffee Grounds

Natural fibres as promising environmental-friendly reinforcements for polymer composites

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