Wood-Plastic Composites: Manufacturing, Rheology and Processing and Process Modeling

Area of Science:

• Materials Science
• Polymer Engineering
• Computational Modeling

Background:

• Wood-plastic composites (WPCs) are increasingly popular due to their durability, water resistance, and cost-effectiveness.
• The global WPCs market is projected to reach USD 15 billion by 2030, driven by construction and automotive sectors.
• Existing reviews cover various WPC aspects, but a comprehensive focus on processing modeling is lacking.

Purpose of the Study:

• To provide a thorough literature review on the rheology and material processing of WPCs.
• To specifically address the modeling of WPCs processing, comparing it to standard polymers and blends.
• To identify gaps in current WPC processing models and suggest future research directions.

Main Methods:

• Literature review of WPC rheology, material processing, and computational modeling.
• Analysis of thermo-rheological properties and structural differences impacting WPC processing.
• Comparison of WPC processing models with those for neat polymers and polymer blends.

Main Results:

• WPC processing differs significantly from standard plastics due to unique thermo-rheological properties and structures.
• Current WPC processing models are limited to single-screw extrusion; models for twin-screw extrusion and injection molding are underdeveloped.
• Yield stress and wall slip phenomena in WPCs significantly influence process throughput and pressure, requiring specific modeling considerations.

Conclusions:

• Accurate modeling of WPC processing requires accounting for yield stress and wall slip effects.
• Further development of processing models for twin-screw extrusion and injection molding of WPCs is crucial.
• Advancements in WPC processing modeling will support market growth and material optimization.