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Theses/Dissertations

Open Access Dissertations

Materials Science and Engineering

2011

Polymer composites

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Full-Text Articles in Engineering

In Situ Reinforced Polymers Using Low Molecular Weight Compounds, Onur Sinan Yordem Sep 2011

In Situ Reinforced Polymers Using Low Molecular Weight Compounds, Onur Sinan Yordem

Open Access Dissertations

The primary objective of this research is to generate reinforcing domains in situ during the processing of polymers by using phase separation techniques. Low molecular weight compounds were mixed with polymers where the process viscosity is reduced at process temperatures and mechanical properties are improved once the material system is cooled or reacted. Thermally induced phase separation and thermotropic phase transformation of low molar mass compounds were used in isotactic polypropylene (iPP) and poly(ether ether ketone) (PEEK) resins. Reaction induced phase separation was utilized in thermosets to generate anisotropic reinforcements. A new strategy to increase fracture toughness of materials ...