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Polymers 2017, 9(8), 334; https://doi.org/10.3390/polym9080334

Cure Behavior and Thermomechanical Properties of Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers

1
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
2
Harbin FRP Institute, Harbin 150029, China
*
Author to whom correspondence should be addressed.
Received: 24 June 2017 / Revised: 27 July 2017 / Accepted: 27 July 2017 / Published: 3 August 2017
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Abstract

Phthalonitrile–polyhedral oligomeric silsesquioxane (POSS) copolymers were prepared by adding two different POSS cage mixtures: epoxycyclohexyl POSS (EP0408) and N-phenylaminopropyl POSS (AM0281). The cure behavior and properties of these polymers were analyzed and compared using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), Fourier transform far infrared (FTIR) measurements, and rheometric studies. The POSS-containing polymers showed higher chemical reactivity, better thermal stability and better mechanical performance in comparison to their unmodified counterparts. All the polymers showed water absorption below 1.5%. As revealed by FTIR measurements, the polymerization products contained triazine ring structures that were responsible for the superior thermal properties exhibited by these POSS-containing polymers. View Full-Text
Keywords: phthalonitrile polymers; POSS; thermal stability; char yield; mechanical performance phthalonitrile polymers; POSS; thermal stability; char yield; mechanical performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, X.; Yu, B.; Zhang, D.; Lei, J.; Nan, Z. Cure Behavior and Thermomechanical Properties of Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers. Polymers 2017, 9, 334.

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