New insight into the influence of molecular dynamics of matrix elastomers on ballistic impact deformation in UHMWPE composites

POLYMER

卷:95

Article

Hsieh, Alex J.¹  Chantawansri, Tanya L.¹  Hu, Weiguo²  Cain, Jason^3,5  Yu, Jian H.⁴ 

[1] US Army, Res Lab, RDRL WMM G, Aberdeen Proving Ground, MD 21005 USA

[2] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

[3] US Army, Res Lab, RDRL WMM A, Aberdeen Proving Ground, MD 21005 USA

[4] US Army, Res Lab, RDRL WMM C, Aberdeen Proving Ground, MD 21005 USA

[5] TKC Global Inc, Suite 400 North,13873 Pk Ctr Rd, Herndon, VA 20171 USA

关键词: Molecular dynamics;    Solid-state NMR;    Matrix elastomers;    Polyurethane;    poly(urethane urea);    UHMWPE prepregs;    Ballistic impact;   

DOI  :  10.1016/j.polymer.2016.04.048

来源: Elsevier

【 摘 要 】

The use of solid-state nuclear magnetic resonance (ssNMR) spectroscopy as a technique for probing and interpretation of the molecular dynamics in select ultrahigh molecular weight poly(ethylene) (UHMWPE) fibers based prepreg materials is investigated. In particular, ssNMR is used to differentiate the influence of molecular dynamics associated with matrix elastomers. Polyurethane and Kraton (R) based elastomers are used in commercial UHMWPE prepregs. The H-1 wideline spectra clearly revealed greater mobility associated with the molecular dynamics of Kraton (R) elastomers than that of polyurethane; this is consistent when comparing prepregs from different manufacturers. These observations corroborate well with the extent of back face deformation in UHMWPE composites when engaged by projectiles, where polyurethane matrix elastomers exhibit greater resistance. Select bulk elastomers were also considered to highlight the dynamic stiffening characteristics associated with matrix elastomers, where results further substantiate the importance of the molecular attributes on the overall dynamic deformation response in these composites. Published by Elsevier Ltd.

【 授权许可】

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