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Materiale Plastice
Cite as: Mater. Plast.
https://doi.org/10.37358/Mat.Plast.1964

OSIM Nr. R102356
ISSN Print 0025-5289
ISSN Online 2668-8220
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Materiale Plastice (Mater. Plast.), Year 2012, Volume 49, Issue 2,





MAGDALENA ADRIANA LADANIUC, LIVIU DUMITRACHE, ALINA RADITOIU, HORIA PAVEN, RALUCA GABOR, GHEORGHE HUBCA The Effect of Molecular Weight of Glycols on the Properties of Epoxy Resins


Abstract:
The article presents and discusses experimental data regarding synthesis and characterization of epoxy resins modified with glycols of different molecular weight, synthesized in a 2: 1 molar ratio resin / glycol. The synthesis of epoxy resins modified with glycols was examined by using the spectrophotometer (FT-IR methods) against analytical (chemical) methods, by determining the content of the epoxy groups in time. Furthermore, in order to determine the influence of the glycol nature on the characteristics of the resulted resins, they were cured by using an aromatic polyamine hardener such as 4.4’-diaminodiphenylmetane (DDM), and the resulted epoxy resins were characterized by using both conventional mechanical analyses and the dynamic mechanical analyses (DMA). From the DMA determinations we noticed that resin flexibility increases in the same time with the polieteric chain length. Keywords: epoxy resin, glycol, glass transition, dynamical properties, mechanical properties



Issue: 2012 Volume 49, Issue 2
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