TY - JOUR
T1 - Molecular influence in the glass/polymer interface design
T2 - The role of segmental dynamics
AU - Hsieh, Alex J.
AU - Veysset, David
AU - Miranda, Daniel F.
AU - Kooi, Steven E.
AU - Runt, James
AU - Nelson, Keith A.
N1 - Funding Information:
This material is based upon work supported in part by the U.S. Army Research Laboratory (ARL) and the U. S. Army Research Office through the Institute for Soldier Nanotechnologies, under contract number W911NF-13-D-0001 . DV and KAN would also acknowledge support through the Office of Naval Research DURIP Grant No. N00014-13-1-0676 . DFM and JR gratefully acknowledge the support of the Office of Naval Research , under grant N00014-14-C-0205 . AJH would like to thank Dr. Robert M. Elder and Dr. John J. La Scala at ARL for fruitful discussions, and also acknowledge Dr. Daniel T. Casem at ARL for the plate impact measurements previously published in Refs. [ 13 ] and [ 34 ].
Publisher Copyright:
© 2018
PY - 2018/6/20
Y1 - 2018/6/20
N2 - Recent observations of the high-velocity impact response in poly (urethane urea), PUU, elastomers has inspired a new inquiry on whether enabling molecular mechanisms could benefit dynamic impedance optimization at the interface of a glass/polymer bilayer, particularly at the moment of impulse interaction. In this work, we investigate the molecular influence on dynamic impedance using microballistic measurements on two bulk elastomers, a PUU and a polyurea, PU. Upon impact at strain rates ∼108/s, PUU exhibits a moderate improvement in resistance against penetration than PU, that is more pronounced at higher speeds. The variation in dynamic stiffening corroborates well with the corresponding segmental dynamics data determined via broadband dielectric relaxation. Meanwhile, we calculate the shock impedance from the shock velocity data derived from the respective shock Hugoniot to discern the efficacy of dynamic impedance optimization between PUU and glass. New insight on molecular attributes will guide glass/polymer interface designs.
AB - Recent observations of the high-velocity impact response in poly (urethane urea), PUU, elastomers has inspired a new inquiry on whether enabling molecular mechanisms could benefit dynamic impedance optimization at the interface of a glass/polymer bilayer, particularly at the moment of impulse interaction. In this work, we investigate the molecular influence on dynamic impedance using microballistic measurements on two bulk elastomers, a PUU and a polyurea, PU. Upon impact at strain rates ∼108/s, PUU exhibits a moderate improvement in resistance against penetration than PU, that is more pronounced at higher speeds. The variation in dynamic stiffening corroborates well with the corresponding segmental dynamics data determined via broadband dielectric relaxation. Meanwhile, we calculate the shock impedance from the shock velocity data derived from the respective shock Hugoniot to discern the efficacy of dynamic impedance optimization between PUU and glass. New insight on molecular attributes will guide glass/polymer interface designs.
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U2 - 10.1016/j.polymer.2018.05.034
DO - 10.1016/j.polymer.2018.05.034
M3 - Article
AN - SCOPUS:85047313020
VL - 146
SP - 222
EP - 229
JO - Polymer
JF - Polymer
SN - 0032-3861
ER -