Selected Properties of a TPS/PA12 Composite Material Produced in a Two-Stage Method

Area of Science:

• Materials Science
• Polymer Science
• Sustainable Materials

Background:

• Growing environmental pollution from non-biodegradable synthetic polymers necessitates research into natural, renewable alternatives.
• Starch, a natural polymer, shows potential but faces challenges due to hydrophilic-hydrophobic incompatibility with synthetic polymers, limiting its use to 20% in blends.
• Existing limitations hinder the development of advanced composite materials utilizing higher proportions of natural polymers.

Purpose of the Study:

• To investigate the feasibility of significantly increasing starch content in polymer materials beyond the conventional 20% limit.
• To develop a method for improving the compatibility and dispersion of starch within synthetic polymer matrices.
• To evaluate the water resistance and mechanical properties of novel polyamide-starch composites with high starch content.

Main Methods:

• Utilized pre-extrusion techniques to enhance the phase dispersion of starch within a polyamide matrix.
• Produced composite materials by blending polyamide and starch, followed by extrusion, milling, and pressing.
• Fabricated and tested samples with starch content levels of 50%, 70%, and 90% to assess material properties.

Main Results:

• Increasing starch content led to higher water susceptibility and reduced strength properties, though effects were often less severe than anticipated.
• Pre-extrusion processing significantly improved the dispersion of starch within the polyamide matrix.
• Composite materials containing up to 70% starch demonstrated satisfactory mechanical properties, indicating successful integration.

Conclusions:

• The study successfully demonstrated that higher starch content (up to 70%) can be incorporated into polyamide composites through pre-extrusion processing.
• While increased starch content impacts water resistance and strength, these effects can be managed and are not prohibitive for certain applications.
• The developed polyamide-starch composite offers a promising sustainable alternative material with tunable properties.