Preparation and characterization of high char yield polybenzoxazine/polyarylacetylene blends for resin-transfer molding

✍ Scribed by Huimin Qi; Guangyan Pan; Lian Yin; Yuanqi Zhuang; Farong Huang; Lei Du

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 160 KB
• Volume: 114
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.30946

✦ Synopsis

Abstract

Benzoxazine precursors (BOZP), 6,6′‐bis(2,3‐dihydro‐3‐(3‐ethynylphenyl)‐4H‐1,3‐ benzoxazinyl)ketone and 6,6′‐bis(2,3‐dihydro‐3‐(3‐ethynylphenyl)‐4H‐1,3‐benzoxazinyl)ether were synthesized and characterized by Proton nuclear magnetic resonace (^1^H‐NMR) and Fourier transform infrared spectroscopy (FTIR). The polyarylacetylene (PAA) was synthesized through thermal polymerization of diethynylbenzene, and characterized by ^1^H‐NMR, FTIR, and Differential Scanning Calorimetry (DSC). The BOZP/PAA blends were prepared with different contents of PAA, and their viscosity was measured using NDJ‐79 rotating visometer. The curing behavior of BOZP/PAA blends was characterized by DSC. The thermal stability of cured BOZP/PAA blends was studied using Thermogravimetric Analysis, the results show char yield at 800°C was in the range of 78–84%. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009