Effect of Pre-Molding Process and Additive of Injection Molded Wood/PP Composites
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Y. Yu
Abstract
Injection molded composites are becoming more widespread in recent years because of their high quality and low cost. However, compared to synthetic fiber composites, it is difficult to maintain a constant fiber volume fraction and uniform distribution for natural fiber composites during the direct injection process. This is mainly because natural fibers are more easily twisted during feeding into the injection machine, owing to their rough surfaces. These feeding difficulties are particularly due to the low bulk densities of natural fibers, especially natural fillers. Additional challenges to the injection process include the concentration and, especially for natural filler reinforced composite. To address these problems, the current study investigates the mechanical properties and morphologies of polypropylene (PP) reinforced by wood powder. Two pre-molding processes, dry-blending and compounding, were compared, and the effects of an additive (crystalline polyalpha olefin (CPAO)) on the mechanical properties of the wood/PP composites were investigated. This investigation is based on tensile, three point bending, and Izod impact tests, and scanning electron microscope (SEM) observation of the fracture surfaces. Results indicated that the composites molded through compounding exhibited better mechanical properties than the samples molded through the direct dry-blending process. In addition, the tensile and bending properties of the composites produced through compounding were found to increase with the addition of CPAO content, because of improved wood powder distribution in the PP matrix.
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© 2014, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Invited Papers
- Simha-Somcynsky Equation of State Modeling of the PVT Behavior of PP/Clay-Nanocomposite/CO2 Mixtures
- Regular Contributed Articles
- Effect of Pre-Molding Process and Additive of Injection Molded Wood/PP Composites
- Flame Retarded PE with MH/ATH/Microencapsulated Red Phosphorous and its Toughening by Polymeric Compatibilizers
- The Porous Structure and Mechanical Properties of Injection Molded HA/PA66 Scaffolds
- A Gas-Sensor-Based Measurement Setup for Inline Quality and Process Control in Polymer Extrusion
- Extrusion and Characterization of Soy Protein Film Incorporated with Soy Cellulose Microfibers
- Development of Composites of Highly Filled Phenol Formaldehyde Resin – Coconut (Cocos nucifera) Endocarp Particles
- Structural Analysis Examining the Mold Deformation Behavior for the Detection of the Flash in the Injection Mold
- Epoxidized Esters of Palm Kernel Oil as an Effective Plasticizer for PVC: A Study of Mechanical Properties and Effect of Processing Conditions
- Injection Molding of Beverage Container Caps Made of a Composite Consisting of Wood Cellulose Fiber and an Ethylene-Acrylic Acid Copolymer
- Study on Pumping Conveying Capacity Characteristics of Polymer Solids in Vane Extruder
- Morphology Control and Stabilization in Immiscible Polypropylene and Polyamide 6 Blends with Organoclay
- Optimization of Abrasive Water Jet Turning Parameters for Machining of Low Density Polyethylene Material Based on Experimental Design Method
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Invited Papers
- Simha-Somcynsky Equation of State Modeling of the PVT Behavior of PP/Clay-Nanocomposite/CO2 Mixtures
- Regular Contributed Articles
- Effect of Pre-Molding Process and Additive of Injection Molded Wood/PP Composites
- Flame Retarded PE with MH/ATH/Microencapsulated Red Phosphorous and its Toughening by Polymeric Compatibilizers
- The Porous Structure and Mechanical Properties of Injection Molded HA/PA66 Scaffolds
- A Gas-Sensor-Based Measurement Setup for Inline Quality and Process Control in Polymer Extrusion
- Extrusion and Characterization of Soy Protein Film Incorporated with Soy Cellulose Microfibers
- Development of Composites of Highly Filled Phenol Formaldehyde Resin – Coconut (Cocos nucifera) Endocarp Particles
- Structural Analysis Examining the Mold Deformation Behavior for the Detection of the Flash in the Injection Mold
- Epoxidized Esters of Palm Kernel Oil as an Effective Plasticizer for PVC: A Study of Mechanical Properties and Effect of Processing Conditions
- Injection Molding of Beverage Container Caps Made of a Composite Consisting of Wood Cellulose Fiber and an Ethylene-Acrylic Acid Copolymer
- Study on Pumping Conveying Capacity Characteristics of Polymer Solids in Vane Extruder
- Morphology Control and Stabilization in Immiscible Polypropylene and Polyamide 6 Blends with Organoclay
- Optimization of Abrasive Water Jet Turning Parameters for Machining of Low Density Polyethylene Material Based on Experimental Design Method
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts