Synthesis and characterization of new nanocomposites based on poly(urethane-imide)s reinforced functionalized carbone nanotubes containing N-Trimellitimido-L-Valine as rigid segments

Faghihi, Khalil; Enayat, Mohammad Reza; Soleimani, Masoumeh

doi:10.61186/CNJ.1.3.130

Synthesis and characterization of new nanocomposites based on poly(urethane-imide)s reinforced functionalized carbone nanotubes containing N-Trimellitimido-L-Valine as rigid segments

Document Type : Original Article

Authors

Khalil Faghihi

Mohammad Reza Enayat

Masoumeh Soleimani

Organic Polymer Laboratory, Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran

10.61186/CNJ.1.3.130

Abstract

New poly(urethane-imide)s (PUIMs/MWCNT) nanocomposites (8a & 8b) containing two different amounts of MWCNTs were prepared by in situ polymerization technique. Transmission electron microscopy (TEM) showed that MWCNTs were exfoliated in the polymer matrix, resulting in well-dispersed morphologies at 1.5 and 2.5 mass% MWCNT contents. The effects of multiwall carbon nanotubes (MWCNT) on the thermal property of new PUIMs/MWCNT derived from N-trimellitimido-L-valine were investigated by thermogravimetric analysis (TGA) in nitrogen atmosphere. TGA results showed that the addition of MWCNT resulted a substantial increase of the thermal stability and char yields of the nanocomposites compared to the neat PUIMs. TEM experiments show morphology and good dispersion of nanotubes in polymeric matrix. The X-ray pattern of the PUIMs/MWCNT nanocomposites (8a) showed the combined peaks appearing in the MWCNT and pure PUIMs (7). Also new poly(urethane-imide) (7) with hard imide ring segments in the main chain was prepared and characterized.

Keywords

Poly(urethane-imide)s

Carbon nanotube (CNTs)

In situ polymerization

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