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Novel Thermally Stable Epoxy-polyurethane Composites: Preparation, Characterization

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Abstract:

A novel series of hydroxyl terminated bisphenol-A type novolac epoxy resins modified with propionic acid (MEP) were prepared by one-step ring-opening reaction process in the presence of tetramethylammonium bromide catalyst. The obtained MEP was characterized using FTIR, 1HNMR analyses. In addition, Intercross-linked epoxy-polyurethane composites networks were also obtained by curing reaction among MEP, cross linker polyisocyanate IL1351 and phthalic anhydride. The thermal characteristics of the epoxy-polyurethane composites were determined by thermogravimetric analysis (TGA). The thermal stability of the cured MEP with different ring-opening rate and cured alkyd polyol A450 were compared. The results showed that the obtained epoxy-polyurethane composites had much better thermal stability than the conventional polyurethane system A450/IL1351, and the thermal stability of them was correlated to the content of MEP.

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Advanced Materials, CEAM 2011 View Preview

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Periodical:

Advanced Materials Research (Volumes 239-242)

Pages:

2742-2747

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.239-242.2742

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Online since:

May 2011

Authors:

Jing Lin, Qiu Zhuan Yang, Xiu Fang Wen, Zhi Qi Cai, Pi Hui Pi, Jiang Cheng, Zhuo Ru Yang

Keywords:

Novolac Epoxy Resin, Polyurethane (PU), Propionic Acid, Thermal Stability

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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