Polypropylene hybrid composites reinforced with long glass fibres and particulate filler

Hartikainen, Juha; Hine, P. J.; Szabó, J; Lindner, Mathias; Harmia, T.; Duckett, R. A.; Friedrich, K.

doi:10.1016/j.compscitech.2004.07.010

Cited by 72 publications

(60 citation statements)

References 30 publications

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“…As principais características do polipropileno no tocante a sua alta aceitação e significativo crescimento são: alta rigidez, baixo peso específico, boa transparência, facilidade de reciclagem e elevada processabilidade, podendo ser estirado e orientado, (fundamental para produção de fibras e filmes orientados). A introdução de fibras e partículas no polipropileno pode gerar sistemas com propriedades mecâ-nicas elevadas o suficiente que permitam a sua utilização na substituição de plásticos de engenharia, normalmente mais onerosos [10,11] . A adição de cargas/fibras também permite ampliar a faixa de temperatura de uso do polipropileno, o que acaba favorecendo uma expansão na aplicação deste políme-ro.…”

Section: Introductionunclassified

Obtenção de compósitos de resíduos de ardósia e polipropileno

Carvalho¹,

Mansur²,

Vasconcelos³

et al. 2007

Polímeros

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Resumo: O uso de ardósia em construções tem frequentemente resultado na produção de uma grande quantidade de resídu-os particulados que tem pequeno valor mercadológico e grande potencial de danificação do meio ambiente. Neste trabalho, partículas de ardósia foram testadas como agente de reforço em polipropileno. Polipropileno e partículas de ardósia foram misturados em um misturador em diferentes frações. Anidrido maleico foi também usado durante a mistura para induzir modificações no polipropileno que levassem a um aumento na interação entre os componentes. As amostras foram caracterizadas por espectroscopia no infravermelho (FTIR) e microscopia eletrônica de varredura. Materiais contendo 5 e 10% de ardósia produziram amostras com características ópticas semelhantes à rocha original. As análises por FTIR e microscopia eletrônica de varredura sugeriram que as modificações químicas no polipropileno levaram a uma melhoria parcial das interações interfaciais entre as partículas de ardósia e o polímero. Propriedades mecânicas, avaliadas por meio de ensaios de resistência à tração, mostraram que a adição das partículas de ardósia não alterou significativamente a resistência mecânica do polipropileno. Assim sendo, a incorporação de partículas de ardósia em polipropileno surge como uma tecnologia potencial para a produção de sistemas com algumas propriedades mecânicas comparáveis ao polipropileno puro, baixo custo, propriedades ópticas próximas às da ardósia e habilidade de minimizar problemas ambientais decorrentes da presença de resíduos derivados de atividades industriais. Palavras-chave: Ardósia, aproveitamento de resíduos, compósitos, polipropileno. Composites Obtained by the Combination of Slate Powder and PolypropyleneAbstract: The use of slate rock in constructions often results in the production of large amount of residual powder that has very low economical value and can also damage the environment. In this work, slate powder was tested as a reinforcing agent for polypropylene. Polypropylene and slate powder were mixed in different ratios in a mixer. Maleic anhydride was also used during the mixing to induce chemical modification of polypropylene in order to improve interactions between the polymer and the inorganic powder. Samples were characterized by infrared spectroscopy and scanning electron microscopy. Samples obtained by adding 5 and 10 wt. % of slate powder in polypropylene had optical properties close to those of commercial slate. FTIR and electron microscopy results suggested that chemical modification of polypropylene led to a partial improvement on the interfacial interactions between slate powder and the polymer. Mechanical properties evaluated by using tensile tests showed that the slate powder did not affect substantially the mechanical strength of polypropylene. Therefore, the incorporation of slate powder in polypropylene emerges as a potential technology for production of systems with some mechanical properties comparable to pure polypropylene, low cost, optical properties close to pure slat...

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Section: Introductionunclassified

Obtenção de compósitos de resíduos de ardósia e polipropileno

Carvalho¹,

Mansur²,

Vasconcelos³

et al. 2007

Polímeros

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“…This has been noted and discussed in previous reports. 33,34 The above results indicate that recycled comminuted prepreg residue is a valuable raw material that can be used as reinforcement and filler in PP-matrix composites. Although the reproduction of composite board including recycled prepreg residue does not always greatly improve mechanical performance (e.g., tensile strength), it may be acceptable for certain applications.…”

Section: Resultsmentioning

confidence: 91%

The Recycling of Comminuted Glass-Fiber-Reinforced Resin from Electronic Waste

Duan

Jia

2010

Journal of the Air & Waste Management Association

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The reuse of comminuted glass-fiber-reinforced resin with various granularities gathered from printed circuit manufacturing residues was investigated. As fillers, these residues were converted into polymeric composite board by an extrusion and injection process using polypropylene as a bonding agent. The mechanical properties of the reproduced composite board were examined by considering the effects of mass fraction and glass-fiber distribution. Interfacial-layer micrograph analysis of the composite material fracture surface was used to study the fiber reinforcement mechanism. Results showed that using comminuted glass-fiber-reinforced resin as a filler material greatly enhanced the performance properties of the composite board. Although the length and diameter of filler varied, these variations had no appreciable effect on the mechanical properties of the processed board. Maximum values of 48.30 MPa for flexural strength, 31.34 MPa for tensile strength, and 31.34 J/m for impact strength were achieved from a composite board containing mass fractions of 30, 10, and 20% glass-fiber-reinforced resin waste, respectively. It was found that the maximum amount of recyclate that could be added to a composite board was 30% of weight. Beyond these percentages, the materials blend became unmanageable and the mixture less amenable to impregnation with fiber. Presented studies indicated that comminuted glass-fiber-reinforced resin wastefilled polypropylene composites are promising candidates for structural applications where high stiffness and fracture resistance are required.

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“…More recently, also so called ternary or hybrid composites have gained increasing attention in the scientific community, opting for a synergistic effect of the three component materials (e.g. PP with fibers and rubber particles or PP with hard particles and rubber particles) on properties and/or cost reduction [3][4][5][6][7][8][9][10][11][12]. During compounding and especially during final part shaping in injection molding and extrusion pro-cessing, the spatial arrangement of the fillers is controlled by the local conditions of the melt flow.…”

Section: Introductionmentioning

confidence: 99%

Anisotropy and compression/tension asymmetry of PP containing soft and hard particles and short glass fibers

Hartl¹,

Jerabek²,

Lang³

2015

Express Polym. Lett.

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Abstract. Polypropylene (PP) composites are used in a wide range of structural applications. Except for fiber reinforced PP, most PP particle composites are commonly considered to be isotropic or at least quasi-isotropic. In this paper, however, the anisotropy of several PP composites containing soft (rubber) and hard (talc) particles and glass fibers is characterized in detail in terms of the material microstructure as well as the resulting mechanical properties in monotonic tensile and compressive experiments. The microstructural investigations showed that all composites displayed a certain surface-core layer structure of distinctly different orientation patterns and with a higher degree of orientation in the surface layer. Also in mechanical testing an anisotropic behavior was observed with the degree of anisotropy being more pronounced in tension than compression. Moreover, the compression/tension asymmetry also strongly depends on filler type and orientation.

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Polypropylene hybrid composites reinforced with long glass fibres and particulate filler

Cited by 72 publications

References 30 publications

Obtenção de compósitos de resíduos de ardósia e polipropileno

Obtenção de compósitos de resíduos de ardósia e polipropileno

The Recycling of Comminuted Glass-Fiber-Reinforced Resin from Electronic Waste

Anisotropy and compression/tension asymmetry of PP containing soft and hard particles and short glass fibers

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