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Citation: XU Kai, ZHANG Liang-Liang, ZHANG Kui, CHEN Ming-Cai. Preparation and Thermal Properties of Phosphorus Containing Naphthyl Epoxy System[J]. Chinese Journal of Applied Chemistry, ;2005, 22(11): 1220-1223. shu

Preparation and Thermal Properties of Phosphorus Containing Naphthyl Epoxy System

1.
Laboratory of Polymer Materials for Electronics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650

Corresponding author: XU Kai,
Received Date: 30 December 2004
Available Online: 30 April 2005

A novel phosphorus-containing naphthyl epoxy was prepared from the modification reaction of diethyl phosphite and DGEBN.The reaction was monitored with FTIR.The results show that the desirable reaction temperature is at 140℃.The proposed structure was confirmed by means of NMR spectra.The modified epoxies were cured with 4,4'-diaminodiphenylsulfone(DDS),and the thermal and mechanical properties of the thermosets were studied via TGA(TGA/FTIR) and DMTA.The glass transition temperature values are in the range of 150.5~159.2℃,and the storage modulus E' is above 1.5 GPa and the char yield higher than 27.6%.The organophosphorus modified epoxy thermosets have been found to degrade in two consecutive steps and are endowed with UL-94 vertical test of V-0 grade when the content of phosphorus is more than 2.02%.
- epoxy,
- phosphorus,
- modification,
- thermal properties,
- flame retardancy
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