Comparative study on artificial and natural weathering of wood-polymer compounds: A comprehensive literature review

Friedrich, Daniel

doi:10.1016/j.cscm.2018.e00196

Cited by 23 publications

(21 citation statements)

References 35 publications

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“…There is, however, the concern that the results obtained from artificial conditions cannot be entirely extrapolated to practical applications [114]. Friedrich [115] comparatively revised artificial and natural weathering results for wood-polymer composites used in cladding applications and found comparable effects in the material. However, these effects needed a 7.4 times longer exposure period under natural conditions compared with accelerated ones.…”

Section: Weathering and Accelerated Ageing Of Polymer Composites Withmentioning

confidence: 99%

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Brebu¹

2020

Polymers

152

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Polymer composites are widely used modern-day materials, specially designed to combine good mechanical properties and low density, resulting in a high tensile strength-to-weight ratio. However, materials for outdoor use suffer from the negative effects of environmental factors, loosing properties in various degrees. In particular, natural fillers (particulates or fibers) or components induce biodegradability in the otherwise bio inert matrix of usual commodity plastics. Here we present some aspects found in recent literature related to the effect of aggressive factors such as temperature, mechanical forces, solar radiation, humidity, and biological attack on the properties of plastic composites containing natural fillers.

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Section: Weathering and Accelerated Ageing Of Polymer Composites Withmentioning

confidence: 99%

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Brebu¹

2020

Polymers

152

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“…The most common FRPs use carbon, glass or aramid (nylon) fibres, in combination with polyester, vinyl ester or epoxy resins [74]. WPC cladding may be produced with PP, and PVC, with PP being the most common [75,76]. Material producers purport specific advantages to each product: for instance, GFRPs have high specific strength and a moderate cost [57]; solid or foamed PVC-U has the feel and workability of wood, good resistance to rot and warp; WPCs are stiff, impact, warp, thermal and rot resistant, with relatively low moisture absorption; and they are made with recycled polymers and wood scrap such as saw dust [77].…”

Section: Polymeric Bems Function and Degradationmentioning

confidence: 99%

“…Friedrich [76] also reviewed aging methods for WPCs used for cladding. The review split studies into artificial weathering and outdoor weathering methods.…”

Section: Combined Aging Factorsmentioning

confidence: 99%

“…The final study reviewed by Friedrich [76] was performed by Silva et al [92] which examined the weathering of composites made up of wood flour from Mezilaurus itauba (ITA) and PP with ethylene vinyl acetate (PP/EVA). Samples consisting of PP/EVA and ITA, as well as pure PP/EVA were tested.…”

Section: Combined Aging Factorsmentioning

confidence: 99%

“…The review by Friedrich [76] focused on the accelerated aging methods and their relevance to estimate the long-term degradation of WPCs used in cladding. This review highlighted the fact that there is less research focused on cladding and research on WPCs weathering focuses more on decking or fencing materials.…”

Section: Combined Aging Factorsmentioning

confidence: 99%

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Critical Review of Polymeric Building Envelope Materials: Degradation, Durability and Service Life Prediction

2021

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This paper provides a critical review of the degradation, durability and service life prediction (SLP) of polymeric building envelope materials (BEMs), namely, claddings, air/vapour barriers, insulations, sealants, gaskets and fenestration. The rate of material deterioration and properties determine the usefulness of a product; therefore, knowledge of the significant degradation mechanisms in play for BEMs is key to the design of proper SLP methods. SLP seeks to estimate the life expectancy of a material/component exposed to in-service conditions. This topic is especially important with respect to the potential impacts of climate change. The surrounding environment of a building dictates the degradation mechanisms in play, and as climate change progresses, material aging conditions become more unpredictable. This can result in unexpected changes and/or damages to BEMs, and shorter than expected SL. The development of more comprehensive SLP methods is economically and environmentally sound, and it will provide more confidence, comfort and safety to all building users. The goal of this paper is to review the existing literature in order to identify the knowledge gaps and provide suggestions to address these gaps in light of the rapidly evolving climate.

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Influence of the blending method over the thermal and mechanical properties of biodegradable polylactic acid/polyhydroxybutyrate blends and their wood biocomposites

Pérez‐Fonseca

Herrera-Carmona

González‐García

et al. 2021

Polymers for Advanced Techs

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This study focused on the effect of the processing method on the thermal, mechanical, and biodegradation properties of polylactic acid/polyhydroxybutyrate (PLA/PHB) blends and their wood biocomposites. The blending techniques were dry‐blending or twin‐screw extrusion, both followed by compression molding. PLA/PHB blends were prepared using 15 and 25% wt. of PHB and biocomposites with 20 and 30% wt. of wood particles. Moreover, a compatibilizer was used during the extrusion process to achieve better matrix‐fiber adhesion. The results showed that the crystallinity of PLA significantly increased with PHB and wood, especially after twin‐screw extrusion. The best results in tensile, flexural, and impact strength were obtained with the extruded and compatibilized PLA/PHB blends, with values higher than the neat biopolymers. The compatibilized biocomposite with 15% wt. PHB, and 20% wt. wood particles showed higher tensile, flexural, and impact properties than PLA. The biodegradation test showed that all samples were disintegrated (above 40%) after 40 days in compost medium, observing slight decreases in the biodegradation rate when PHB or wood particles were added. Even when the lower mechanical properties were obtained with the dry‐blending technique, they are still competitive for different applications, providing the possibility to produce blends and biocomposites, avoiding the extrusion process that requires more energy consumption and longer processing times.

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Comparative study on artificial and natural weathering of wood-polymer compounds: A comprehensive literature review

Cited by 23 publications

References 35 publications

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Critical Review of Polymeric Building Envelope Materials: Degradation, Durability and Service Life Prediction

Influence of the blending method over the thermal and mechanical properties of biodegradable polylactic acid/polyhydroxybutyrate blends and their wood biocomposites

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