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Miscibility, morphology and fracture toughness of tetrafunctional epoxy resin/poly (styrene-co-acrylonitrile) blends

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Abstract

Poly(styrene-co-acrylonitrile) (SAN) was found to be miscible with the tetraglycidylether of 4,4'-diaminodiphenylmethane (TGDDM), as shown by the existence of a single glass transition temperature (T g) over the whole composition range. However, SAN was found to be immiscible with the 4,4′-diaminodiphenylmethane (DDM)-cured TGDDM. Dynamic mechanical analysis (DMA) shows that the DDM-cured TGDDM/SAN blends have two T gs. A scanning electron microscopy (SEM) study revealed that all the DDM-cured TGDDM/SAN blends have a two-phase structure. The fracture toughness K IC of the blends increased with SAN content and showed a maximum at 10 wt% SAN content, followed by a dramatic decrease for the cured blends containing 15 wt% SAN or more. The SEM investigation of the K IC fracture surfaces indicated that the toughening effect of the SAN-modified epoxy resin was greatly dependent on the morphological structures.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, People's Republic of China

    Xuezheng Song, Sixun Zheng, Jinyu Huang & Pingping Zhu

  2. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, People's Republic of China

    Qipeng Guo

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  1. Xuezheng Song
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  2. Sixun Zheng
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Song, X., Zheng, S., Huang, J. et al. Miscibility, morphology and fracture toughness of tetrafunctional epoxy resin/poly (styrene-co-acrylonitrile) blends. Journal of Materials Science 35, 5613–5619 (2000). https://doi.org/10.1023/A:1004824628535

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