Manufacturing of Self-Reinforced All-PP Composites

Błędzki, Andrzej K.; Heim, Hans-Peter; Passmann, D.; Ries, Angela

doi:10.3139/9781569905258.022

Cited by 5 publications

(3 citation statements)

References 53 publications

(89 reference statements)

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“…According to the authors, the best fit for jute fabrics was observed with the analytical models of Freundlich and the fiveterm polynomial. Expressions for these models are shown in equations (1) and (2), respectively.…”

Section: Processing Methods Available To Natural Fiber Compositesmentioning

confidence: 99%

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Compression molding of algae fiber and epoxy composites: Modeling of elastic modulus

Constante

Pillay

2016

Journal of Reinforced Plastics and Composites

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The demand for natural fiber composites in the automotive industry in both Europe and the United States has been forecasted to increase in the coming years. The natural fiber composites based on highly commercialized fibers such as flax, hemp, and sisal has grown to become an important sector of polymeric composites. However, little attention has been addressed to expanding natural fiber composites to include new sources of emerging natural reinforcements, such as reclaimed algae fibers, that have a multiple environmental benefits. Not only are extracted algae fibers biodegradable, the reclamation process has the added benefit of restoring health of waterways choked with algae. This study focuses on the processability of algae fiber–epoxy composites. Short fibers, chemically extracted from raw reclaimed algae, were prepared for natural fiber composite products in two ways. First, randomly oriented mats were produced using the wet-laid process to create layered, compression-molded laminates. Second, loose fibers were dispersed directly into the thermoset matrix to produce a bulk molding compound that was further compression molded into composite lamina. The effect of processing variables such as compaction pressure, temperature, and time were addressed. Moreover, the effect of fiber volume fraction ( υf) and fiber form were considered. Enhanced mechanical properties were found when 56% υf algae fiber was used for the compression-molded laminates composite. This variant exhibited an improvement on the flexural and tensile modulus of 70% and 86% when compared to the neat epoxy. However, the volume of porosity on the same variant was 11% due to lack of compression in some of the fibers. The effect of porosity on the theoretical stiffness was estimated by using the Cox–Krenchel model. Furthermore, an empirical exponential model was formulated to characterize the multi-scale effect of compaction pressure on the overall fiber volume fraction, υf.

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Section: Processing Methods Available To Natural Fiber Compositesmentioning

confidence: 99%

“…Recently, there has been growing interest in the application of biodegradable composite materials in the automotive sector. 1,2 The first conference exhibition dedicated to bio-based automobiles was held in Germany during September 2015. 3 Interesting and novel industrial applications of natural fiber composites (NFCs) are to be presented.…”

Section: Introductionmentioning

confidence: 99%

Compression molding of algae fiber and epoxy composites: Modeling of elastic modulus

Constante

Pillay

2016

Journal of Reinforced Plastics and Composites

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“…A team of researchers investigated the possibility of grading SRC (Biermann et al 2012;Bledzki et al 2008Bledzki et al , 2012Heim et al 2012;Paßmann 2009;Schöppner et al 2013). This involves selectively adjusting the mechanical properties of certain areas of the SRC via the process sensitivity (Heim et al 2013a(Heim et al ,b, 2014Rohde et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Modification of self-reinforced composites (SRCs) via film stacking process

Jakob

Pollmeier

Bisevac

et al. 2022

International Polymer Processing

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This work presents the mechanical behavior of self-reinforced composites (SRCs) manufactured and modified via film stacking. For modification, interleaved films made of polypropylene (PP), a thermoplastic elastomer and a polyolefin engage were combined in different ways to induce the elastic modifier into the matrix material. The content of modifier was also varied in two ways. First, the films were produced out of a single material and second out of a compound. So, the same content of modifier was implemented in two different ways. It is shown that, in case of this research, only the kind of modifier and the content but not the way of implementation are responsible for the mechanical behavior of SRCs. It is shown that the modification can adjust the tensile strength, tensile stiffness and impact properties in a broad range. It is also shown that different mechanical properties of the composite can be predicted by a regression model that uses the Shore A hardness and the content of modifier.

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Structural description of self‐reinforced polypropylene composites

Ries

2021

J of Applied Polymer Sci

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Self‐reinforced polypropylene composites (SR‐PP) possess an exceptional property spectrum and are predestined for use in a multitude of structural or semi‐structural applications. However, the underlying macromolecular orientation can only be transferred into the layered composites consolidated out of highly stretched fibres and tapes of semi‐finished textile products. Specific preservation of the self‐reinforcement throughout processing and beyond is necessary and creates special challenges for processing technology. Depending on the processing temperatures and pressures selected, the highly oriented fibres and tapes are influenced by their own degree of self‐reinforcement, which, in turn, affects the microstructure and remaining composite properties. In this publication, three different semi‐finished textile products are introduced as basic materials. Exemplary selected test samples, which display a low degree of compaction on the one hand and a high degree of compaction on the other, were subject to wet chemical etching to enable confocal laser scanning microscopic images to be created. These images were then used to compare the microstructures of the semi‐finished textile products that were used.

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Manufacturing of Self-Reinforced All-PP Composites

Cited by 5 publications

References 53 publications

Compression molding of algae fiber and epoxy composites: Modeling of elastic modulus

Compression molding of algae fiber and epoxy composites: Modeling of elastic modulus

Modification of self-reinforced composites (SRCs) via film stacking process

Structural description of self‐reinforced polypropylene composites

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