Ballistic Response of Polydicyclopentadiene vs. Epoxy Resins and Effects of Crosslinking
| Autor: | Joseph L. Lenhart, Mark D. Hindenlang, Adam D. Richardson, Robert M. Elder, Timothy W. Sirk, Tyler R. Long, Jian H. Yu, William A. Spurgeon, Steven E. Boyd, Kevin A. Masser, Daniel B. Knorr |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology Polymer Dynamic mechanical analysis Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Fracture toughness Brittleness chemistry visual_art visual_art.visual_art_medium Polydicyclopentadiene Composite material 0210 nano-technology Glass transition FOIL method |
| Zdroj: | Dynamic Behavior of Materials, Volume 1 ISBN: 9783319411316 |
| DOI: | 10.1007/978-3-319-41132-3_37 |
| Popis: | The ballistic performance of polydicyclopentadiene (pDCPD) was investigated and compared to two epoxy resins that a have similar glass transition temperature (Tg) to pDCPD. The ballistic performance of these materials (at an effective stain rate of 104–105 s−1) was characterized by determining the kinetic energy of the projectile where there is a 50 % probability that the projectile will penetrate a witness foil behind the sample (KE50). The ballistic performance of pDCPD showed a 300–400 % improvement over the structural epoxy resins. Typical, highly crosslinked epoxy networks become brittle at low temperatures, but pDCPD has a superior ballistic performance over a broad temperature range from (−55 to 75 °C), despite having a glass transition temperature of 142 °C, which characteristic of structural resins. pDCPD also exhibited a room temperature glassy storage modulus of 1.7 GPa, making pDCPD a potential structural resin that can overcome the structural vs. energy dissipation trade-off that commonly exists with some conventional crosslinked polymers. Quasi-static measurements of pDCPD when compared to epoxy resins suggested that the performance of pDCPD relates to higher fracture toughness and lower yield stress relative to typical epoxies, while molecular dynamics simulations comparing pDCPD to epoxy resins suggest that the performance of pDCPD is due to the lack of strong non-covalent interactions and the facile formation of nanoscale voids. |
| Databáze: | OpenAIRE |
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