Functionalized Polycyclic Aromatic Polymers for High Temperature Wireless Chemical Memory Threshold Sensors

by Leonhardt, B; Pasupathy, P; Trivedi, T; Zhang, S; Neikirk; Ekerdt, JG

JOURNAL OF INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH; May 17 2017; Volume: 56; Issue: 19; Pages: 5479-5482; DOI: 10.1021/acs.iecr.6b04541

A pair of new polymers, poly(di-t-butylacenaphthylene) (pTBAcN) and poly(dipropylacenaphthylene) (pPAcN), were made via Friedel-Crafts alkylation of polyacenaphthylene. These polymers exhibit thermal stability beyond 250 degrees C and solubility in excess of 25 wt % in aliphatic hydrocarbons. Films of pPAcN over 10 lam thick were successively applied to planar surfaces via brush coating. Chemical memory for a passive wire resonant sensor was utilized to detect aliphatic hydrocarbons in high temperature environments. The coated threshold sensor showed a lower, stable resonant frequency before and after exposure to water at 130 degrees C for 3 h and showed an increased triggered resonant frequency after aliphatic exposure, consistent with an uncoated sensor device.

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