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Investigations on anticorrosive, thermal, and mechanical properties of conducting polyurethanes with tetraaniline pendent groups
Author(s) -
Arukula Ravi,
Thota Apparao,
Boga Karteek,
Narayan Ramanuj,
Rao Chepuri R.K.
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4267
Subject(s) - polyurethane , isophorone diisocyanate , materials science , glycidol , diol , curing (chemistry) , chemical engineering , polymer chemistry , electrochemistry , composite material , electrode , organic chemistry , catalysis , chemistry , engineering
This article describes the synthesis of conducting hybrid polyurethanes from novel tetraaniline‐diol as Gly‐TAni (glycidol with TAni). A new diol Gly‐TAni has been synthesized in a simple process using tetraaniline (TAni) and glycidol via SN2 reaction in a single‐step process. The asymmetric diol (Gly‐TAni) and polyols (PTMEG and TMP) were reacted with isophorone diisocyanate at OH:NCO ratio of 1:1.2 to obtain ―NCO terminated hybrid conducting polyurethanes. These were subjected for curing under atmospheric moisture to obtain conducting polyurethane‐urea coatings. The conducting coatings showed considerable enhancement in thermal and mechanical stabilities. All these conducting coatings films showed excellent corrosion resistance (on mild steel electrode) with an increase in the percentage of Gly‐TANi (5 to 15 wt%). The films of these hybrid polyurethanes containing pendent tetraanilines showed good surface conductivity in the range of 3.69 × 10 −4 to 2.21 × 10 −3 S/cm. The electrochemical investigation showed 2 single electron oxidation and 2 single reductions reversibly, centred around tetraaniline segments present in the polymer.