Processing and Dynamic Failure Characterization of Novel Impact Absorbing Transparent Interpenetrating Polymer Networks (t-IPN)
Abstract
IPNs were synthesized with polyurethane (PU) and methacrylate-based polymers to create transparent materials with high toughness for potential impact loading applications. It has four parts with the fourth involving successful synthesis of IPNs based on PU and poly(methyl methacrylate) (PMMA). Other aspects included: aliphatic vs. aromatic isocyanates in the PU phase, the presence of an inhibitor in the PMMA phase (sequential vs. simultaneous reactions), curing profiles, and ratios of PU:PMMA. Samples that included an iliphatic isocyanate and a sequential polymerization demonstrated the best material properties. IPNS with PMMA:PU ratios in the range of 90:10 to 70:30 were mechanically characterized. Dynamic fracture test and low-velocity impact test were performed. Dynamic fracture and impact responses show that an optimum PMMA:PU ratio in the IPNs produce enhanced fracture toughness (~40%) and energy impact absorption (~300%) relative to PMMA. Fractography shows phase inversion associated with improved macroscale dynamic properties
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2014
- Accession Number
- ADA595856
Entities
People
- Hareesh V. Tippur
- Maria L. Auad
Organizations
- Auburn University