Relationships between the curing conditions and some mechanical properties of hybrid thermosetting materials

Journal of the Brazilian Chemical Society

Newton L. Dias Filho²  Celso X. Cardoso¹  Hermes A. De Aquino² 

[1] ,Universidade Estadual Paulista Departamento de Física e Química Ilha Solteira SP ,Brazil

关键词: differential scanning calorimetry;    siloxane;    epoxy resin;    silsesquioxanes;    nanocomposites;   

DOI  :  10.1590/S0103-50532006000500018

来源: SciELO

【 摘 要 】

The relationship between the heat of polymerization (deltaH) and activation energy (Ea) parameters, obtained by differential scanning calorimetry (DSC) and the ratio of epoxy resin to hardener of the thermosetting materials based on an organic-inorganic hybrid epoxy resin (OG) was investigated. Activation energy (Ea) and heat of polymerization (deltaH) increased with an increasing OG content, up to 70 wt%. Further increase in OG content to 80wt% reduced Ea and deltaH. Dynamic mechanical analysis indicates that the maximum cross-link density is obtained at 83 wt% OG, whereas fracture toughness and tensile modulus mechanical properties are maximized at 70 wt% OG.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License