Citation: Jing-Zhi Ma, Kang Cheng, Jiang-Bo Lv, Chang Chen, Jiang-Huai Hu, Ke Zeng, Gang Yang. Phthalonitrile-PPO Blends: Cure Behavior and Properties[J]. Chinese Journal of Polymer Science, ;2018, 36(4): 497-504. doi: 10.1007/s10118-018-2026-x shu

Phthalonitrile-PPO Blends: Cure Behavior and Properties

State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China

Corresponding author: Ke Zeng, zk_ican@sina.com Gang Yang, yanggang65420@163.com
Received Date: 6 July 2017
Accepted Date: 26 August 2017
Available Online: 16 November 2017

Hydroxy-containing low molecular weight poly(2,6-dimethyl-1,4-phenylene oxide) (rPPO) and self-promoted hydroxy-containing phthalonitrile (HPPH) were prepared by redistribution reaction and the simple nucleophilic displacement of a nitro-substituent from 4-nitrophthalonitrile in a dipolar aprotic solvent respectively. The hydroxy-containing phthalonitriles modified by rPPO were prepared by mechanical blending without compatibilizer, followed by heating. The curing behavior was studied using dynamic rheological analysis, and the results showed that the rPPO-modified phthalonitrile exhibited a large processing window (over -67℃) and complex viscosity (0.18-0.8 Pa·s) at moderate temperatures. After curing at 300℃, the resulting polymers showed good thermal stability and high modulus as observed by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The dielectric properties and the morphology of rPPO-modified phthalonitrile networks were studied by dielectric analysis and field-emission scanning electron microscopy (SEM).
- Low molecular weight PPO,
- Phthalonitrile,
- Curing behavior,
- Dielectric properties
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