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Morphologies and mechanical and thermal properties of highly epoxidized polysiloxane toughened epoxy resin composites

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An Erratum to this article was published on 24 December 2010

Abstract

A novel highly epoxidized polysiloxane was synthesized to modify the diglycidyl ether of bisphenol-A (DGEBA). The mechanical and thermal properties as well as the morphology of the cured epoxy resins were examined by tensile testing, impact testing, fracture testing, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and environmental scanning electron microscopy (ESEM). The chemical structure of the highly epoxidized polysiloxane (HEPSO) was confirmed by Fourier transform infrared spectroscopy (FTIR), 29Si nuclear magnetic resonance spectroscopy (29Si NMR), and gel permeation chromatography (GPC). The T g increased by approximately 8 °C after introducing HEPSO. TGA in air showed that the initial degradation temperature for 5% weight loss (T d 5%), the temperature for 50% weight loss (T d 50%) and the residual weight percent at 800 °C (R 800) were increased after introducing HEPSO. The addition of 4 phr HEPSO2 resulted in the highest increase in tensile strength, impact strength and fracture toughness (K IC ). The morphology of the fracture surfaces show that the miscibility of polysiloxane with epoxy resin increased with increasing epoxide group in HEPSO. The high epoxide groups in HEPSO can react during the curing process, and participate chemically in the crosslinking network. HEPSO is expected to improve significantly the toughness and thermal stability of epoxy resin.

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Authors and Affiliations

  1. Key Laboratory of Polymer Materials for Electronics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Weiqu Liu

  2. Key Laboratory of Polymer Materials for Electronics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Songqi Ma, Zhengfang Wang, Chaohui Hu & Chunyi Tang

  3. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    Songqi Ma, Zhengfang Wang, Chaohui Hu & Chunyi Tang

Authors
  1. Weiqu Liu
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  2. Songqi Ma
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  3. Zhengfang Wang
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  4. Chaohui Hu
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  5. Chunyi Tang
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Correspondence to Weiqu Liu.

Additional information

An erratum to this article can be found at http://dx.doi.org/10.1007/s13233-010-1217-1

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Liu, W., Ma, S., Wang, Z. et al. Morphologies and mechanical and thermal properties of highly epoxidized polysiloxane toughened epoxy resin composites. Macromol. Res. 18, 853–861 (2010). https://doi.org/10.1007/s13233-010-0912-3

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  • DOI: https://doi.org/10.1007/s13233-010-0912-3

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