Fabrication of the self‐reinforced composites using co‐extrusion technique

Andrzejewski, Jacek; Szostak, Marek; Barczewski, Mateusz; Krasucki, Janusz; Sterzyński, Tomasz

doi:10.1002/app.41180

Cited by 19 publications

(12 citation statements)

References 34 publications

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“…The statement presented above is in a good agreement with these presented in our previous works . It was indicated that the addition of phPOSS enables only a partial suspension of DMDBS activity as a clarifying effect and in the same time delays a viscosity increase.…”

Section: Resultssupporting

confidence: 91%

Influence of a sorbitol‐based nucleating agent modified with silsesquioxanes on the non‐isothermal crystallization of isotactic polypropylene

Barczewski

Dobrzyńska‐Mizera

Dudziec

et al. 2013

J of Applied Polymer Sci

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This article investigates the effect of modifying the polypropylene (iPP) a-phase nucleating agent 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol (DMDBS) with tetrasilanolphenyl silsesquioxane (phPOSS). It has been proven that an increasing amount of silsesquioxane leads to differences in the crystallization behavior. What is more, it has been observed that the nucleation effect that results from the addition of sorbitol derivatives is suppressed by phPOSS activity. To understand the influence of phPOSS addition on the crystallization kinetics of PP/DMDBS/phPOSS composites that have been prepared by melt processing in a twin screw extruder, differential scanning calorimetry, rotational rheometry and Fourier transform infrared spectroscopy are performed.

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Section: Resultssupporting

confidence: 91%

Influence of a sorbitol‐based nucleating agent modified with silsesquioxanes on the non‐isothermal crystallization of isotactic polypropylene

Barczewski

Dobrzyńska‐Mizera

Dudziec

et al. 2013

J of Applied Polymer Sci

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“…It can be seen that compared with the non‐reinforced ePP, a 4‐fold increase of the tensile strength and a 7‐fold increase of the tensile modulus were achieved by preparing short‐fibre reinforced SR‐PPCs. The achieved noticeable improvement of the tensile properties is significantly better than achieved earlier by injection moulding technology using co‐extruded composite pellets or bicomponent PP fibres as raw materials . In our system, the homopolymer fibres did not aggregate and could maintain their mechanical performance during processing and thus serve as adequate reinforcement in the composite.…”

Section: Resultsmentioning

confidence: 99%

“…The achieved noticeable improvement of the tensile properties is significantly better than achieved earlier by injection moulding technology using co-extruded composite pellets or bicomponent PP fibres as raw materials. 7,8 In our system, the homopolymer fibres did not aggregate and could maintain their mechanical performance during processing and thus serve as adequate reinforcement in the composite.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

“…In the case of polypropylene, the increasing ethylene copolymer content is also positively correlated to the increase of the impact strength . Sterzynski et al used co‐extruded composite pellets and bicomponent fibres as input materials for injection moulding of SRPCs, but to achieve homogeneous distribution of reinforcing fibres in the injection moulded products proved to be rather challenging, and due to undesired fibre aggregations the reinforcing efficacy remained moderate in both cases. Kmetty et al proposed to use pre‐impregnated pellets, prepared by film‐stacking of high tenacity polymer fibres and copolymer matrix, serving as adequate starting material for injection moulding of SRPCs with homogeneous fibre distribution and improved mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

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Flame retarded self‐reinforced polypropylene composites prepared by injection moulding

Vadas

Kmetty

Bárány

et al. 2017

Polymers for Advanced Techs

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A method was elaborated to prepare flame retarded self-reinforced polypropylene composites by injection moulding. The effect of intumescent flame retardant (FR) loading was comprehensively investigated on the morphology, flammability, and mechanical properties of the self-reinforced polypropylene composites and compared with non-reinforced counterparts of identical additive contents. Homogeneous distribution of both the reinforcing polypropylene fibres and the FR additive was achieved endowing significantly improved strength and stiffness accompanied with increased fire resistance. At 10% FR content, 37% reduction of peak of heat release rate, UL94 V-2 rating, and LOI of 24.5 vol% were achieved without compromising the improved mechanical performance of the injection moulded self-reinforced composites, ie, a 4-fold increase of tensile strength and a 7-fold increase of tensile modulus were reached compared with the non-reinforced counterpart. At higher loading (15% FR), the FR properties improved further (LOI of 29.5 vol% was reached); however, due to the abrasive effect of the FR particles in the matrix, the structure of the reinforcing fibres tends to get damaged during the thermo-mechanical processing, and thus their reinforcing efficacy deteriorated. It is demonstrated that the combination of polymer fibre reinforcement with other fillers (such as FRs) is advantageous and feasible even by injection moulding, but the balance between the individual attributed properties needs to be found. This concept provides advantages in terms of interfacial properties, mechanical performance to weight ratio, recyclability, and environmental impact; 1 therefore, SRPCs gain increasing interest in both academia and industries.Nowadays, SRPCs are mainly produced by 3 processing methods:hot compaction, consolidation of coextruded tapes, and film stacking. 2 All of these methods yield in sheet-like (pre) products; these ways 3-dimensional parts with complex geometry cannot be directly produced. Therefore, increasing attempts are being made to produceSRPCs by the more versatile injection moulding method. Polymer fibres with highly aligned molecular or supramolecular structure, 3 generally created during spinning or drawing, can serve as suitable reinforcements in the structurally similar polymer matrix. One of the greatest challenges in using thermoplastic fibres to reinforce thermoplastic matrices is in their combination into a well-consolidated composite, which, normally achieved by thermal means, is complicated by the narrow window between the melting temperature of the matrix and that of the reinforcing fibres. 4 One possible way to disturb the regularity of the macromolecular chain and thus lower the crystalline melting temperature is copolymerization. Using a block or graft copolymer as matrix giving constituent fairly wide processing window can be ensured for SRPC preparation, wide enough even for injection moulding technology. 5 In the case of polypropylene, the increasing ethylene copolymer content is also positively corr...

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“…The concept of presented hybrid composite and the preparation using the hot compaction method is approaching the tested materials to the self‐reinforced composites . The use of two component materials for the preparation of self‐reinforced composites has been described for the materials obtained by compression moulding, injection molding, or even selective dissolution . In this paper the results of the cited works are simultaneously confronted with the idea of hybrid strengthening.…”

Section: Introductionmentioning

confidence: 99%

Polypropylene composites obtained from self‐reinforced hybrid fiber system

Andrzejewski

Tutak

Szostak

2015

J of Applied Polymer Sci

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The purpose of the study was to obtain a composite material with the self-reinforced structure, which processing provide increased mechanical properties. The composites used in presented work were prepared from the two types of fiber mixtures, both were based on polypropylene fibers, the difference was in used cellulose or wood flour filler. Composites were prepared using the hot compaction method. The presented research describes the effect of the composite composition and processing conditions. The results include the static tension measurements, tensile impact tests and thermal analysis, including: DSC and DMTA. The structure has been studies using the SEM observations. Results of presented studies confirm the self-reinforcing effect in obtained hybrid composites. It provides in the comparison to the standard wood polymer composites to the higher level of material reinforcement with lower amount of natural filler.

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Fabrication of the self‐reinforced composites using co‐extrusion technique

Cited by 19 publications

References 34 publications

Influence of a sorbitol‐based nucleating agent modified with silsesquioxanes on the non‐isothermal crystallization of isotactic polypropylene

Influence of a sorbitol‐based nucleating agent modified with silsesquioxanes on the non‐isothermal crystallization of isotactic polypropylene

Flame retarded self‐reinforced polypropylene composites prepared by injection moulding

Polypropylene composites obtained from self‐reinforced hybrid fiber system

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