Accession Number:

ADA595856

Title:

Processing and Dynamic Failure Characterization of Novel Impact Absorbing Transparent Interpenetrating Polymer Networks (t-IPN)

Descriptive Note:

Technical rept. 1 Apr 2009-31 Mar 2013

Corporate Author:

AUBURN UNIV AL

Personal Author(s):

Report Date:

2014-02-01

Pagination or Media Count:

28.0

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 polymethyl 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 PUPMMA. Samples that included an iliphatic isocyanate and a sequential polymerization demonstrated the best material properties. IPNS with PMMAPU ratios in the range of 9010 to 7030 were mechanically characterized. Dynamic fracture test and low-velocity impact test were performed. Dynamic fracture and impact responses show that an optimum PMMAPU 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

Subject Categories:

  • Plastics
  • Armor
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE