4.7 Article

Synthesis and characterization of triazole rich polyether polyols using click chemistry for highly branched polyurethanes

Journal

REACTIVE & FUNCTIONAL POLYMERS
Volume 73, Issue 12, Pages 1597-1605

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.reactfunctpolym.2013.09.002

Keywords

Polyurethane; 1,2,3-Triazole; DMTA; TGA; Antimicrobial coatings

Funding

  1. Council of Scientific and Industrial Research (CSIR, New Delhi, India)

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The present work describes development of moisture cured polyurethane urea coatings based on 1,2, 3-triazole rich polyether polyols. In this paper, two polyether polyols were synthesized by using 1, 3-dipolar azide-alkyne cycloaddition reaction and they were named as PL-1 and PL-2 where PL-1 is 9 terminal hydroxyl groups and PL-2 is 6 terminal hydroxyl groups. These polyols were reacted with 4, 4'-diisocyanatodicyclohexylmethane (H12MDI) at OH:NCO ratio of 1:1.2 in order to obtain isocyanate terminated polyurethane prepolymers. The resulted prepolymers were casted on tin foil and cured under atmospheric moisture in order to get completely cured polyurethane urea free films. The free films were characterized by using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and dynamic mechanical thermal analysis (DMTA) techniques. The TGA and DMTA results showed that these films have good thermal and mechanical stability. Anti-microbial studies proved that these polyurethane films show good resistance towards different bacterial and fungal attacks. These polymers were also coated on mild steel panels in order to evaluate corrosion resistance properties by using salt spray and electro chemical polarization studies. (C) 2013 Elsevier Ltd. All rights reserved.

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