Title: Interpenetrating polymer networks and polymer blends with anomalous behaviour of the viscoelastic functions

Authors: M.M. Mateev, L. Totev

Addresses: Experimental Physics Department, University of Plovdiv, Tsar Assen Str. 24, BG-4000 Plovdiv, Bulgaria. ' Experimental Physics Department, University of Plovdiv, Tsar Assen Str. 24, BG-4000 Plovdiv, Bulgaria.

Abstract: This study examined thermo-crosslinked hydrophilisated unsaturated polyester resin (HUPR), urea-formaldehyde resin (UFR), melamine formaldehyde resin (MFR) and HUPR/UFR = 90/10, 70/30, 40/60% and HUPR/MFR = 90/10, 70/30% systems. By tracing the relaxation transitions from the glassy state (GS) to a highly-elastic state (HES) the modulus G′, G″, J′, J″ and the loss factor tgδ have been investigated for these polymers. By means of temperature dependencies of lgG′, lgG″, lgJ′, lgJ″, lg(tgδ) G′, J′, and the dependencies lgG″(lgG′), lgJ″ (lgJ′) an anomalous behaviour has been observed for the dynamical mechanical (visco-elastic) functions. An amorphous polymer structure have been established with many physical components. Under a weight-ratio of 90/10% polymer blends were obtained and under other weight-ratios interpenetrating networks (IPN) were found.

Keywords: anomalous behaviour; viscoelastic functions; interpenetrating polymer networks; polymer blends; viscoelasticity; hydrophilisated unsaturated polyester resin; HUP; urea-formaldehyde resin; UFR; melamine formaldehyde resin; MFR.

DOI: 10.1504/IJMPT.1994.036425

International Journal of Materials and Product Technology, 1994 Vol.9 No.4/5/6, pp.310 - 322

Published online: 03 Nov 2010 *

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