The Role of Extrusion Conditions on the Mechanical Properties of Thermoplastic Protein
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Abstract
Mechanical properties of Novatein thermoplastic protein compounded at different extrusion temperatures and processing water contents have been examined in a factorial experiment. Thermoplastic proteins are moisture sensitive and can be prone to thermal degradation during processing. Processing water was varied between 30 and 45 parts per hundred parts bloodmeal while the extrusion temperature was varied between 120 and 150 °C to identify a processing window suitable for process scale up. To resolve any effects processing water had on protein-protein interactions from its plasticising effect, injection molded specimens were mechanically tested both as molded and after conditioning at controlled temperature and humidity. Despite all conditioned samples having approximately the same moisture content, mechanical properties were different. Tensile strength and modulus decreased with increasing processing water at the same equilibrium moisture content. DMA and WAXS suggested this was due to changes in chain mobility within the amorphous phase of the material, rather than conformational change towards a more ordered state. Properties of unconditioned specimens were mostly dependent on the plasticising effect of different amounts of processing water remaining in the material after injection molding. Extrusion temperature had very little effect on mechanical properties, suggesting that Novatein is robust enough to handle some temperature variations during processes such as injection molding.
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Influence of Glass Microsphere Filler on the Rheological Behavior of an Epoxy Resin
- Morphology and Mechanical Properties of Itaconic Anhydride Grafted Poly(lactic acid) and Thermoplastic Protein Blends
- An Effective α/β Nucleating Agent Compoundfor the Preparation of Polypropylene
- Experimental and Theoretical Study on Screw Filling in Starve Fed Single Screw Extruders
- The Role of Extrusion Conditions on the Mechanical Properties of Thermoplastic Protein
- Investigation of the Behavior of Organo-Metallic Compound and Its Influence on Polyurethane
- A Novel Technique for Manufacturing Polypropylene Based Functionally Graded Materials
- Development of a Segmented Temperature Control for Targeted Solidification in Injection Molding
- Rheology and Foaming of Long-Chain Branched Ethylene-Tetrafluoroethylene Copolymer and Its Blends
- Optical and Structural Characteristics of CdSe/PMMA Nanocomposites
- Crystallization Behavior of Polyvinyl Alcohol with 1,2-Diol Side-Chains
- Effects of Mean Particle Size and Addition Weight Percentage of CaCO3 on Selected Rheological Properties of Filled LDPE
- Using a Visualization Mold to Discuss the Influence of Gas Counter Pressure and Mold Temperature on the Fountain Flow Effect
- Recycling of Virgin and Post-Consumer Polypropylene and High Density Polyethylene
- An Open-Source Framework for the Computer Aided Design of Complex Profile Extrusion Dies
- Rapid Communications
- Investigation of the Mechanical and Thermal Properties of LFR PA66 with Graphene Coating on Fibre Surface
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