期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 32, 期 8, 页码 1086-1098出版社
SPRINGER
DOI: 10.1007/s10118-014-1479-9
关键词
Polybenzoxazine; Phosphazene; Flame retardant; Dielectric properties
资金
- BRNS, Mumbai, Govt. of India [2012/37C/9/BRNS]
Cyclophosphazene nanotube (PZT) incorporated poly(benzoxazine-co-E >-caprolactam) (P(BZ-co-CPL)) nanocomposites were developed for improving flame retardant properties. The effects of PZT on the flammability properties of P(BZ-co-CPL) matrix were evaluated through UL-94 flammability test and limiting oxygen index (LOI). The UL-94 results of P(BZ-co-CPL)/PZT hybrid nanocomposites showed V-1 rating, whereas neat P(BZ-co-CPL) showed burning rating. The LOI values are increased from 25.4 to 31.4 for 1.5 wt% PZT incorporated P(BZ-co-CPL) nanocomposite systems. SEM was used to study the char morphology of P(BZ-co-CPL)/PZT after being exposed to UL-94 flammability test. Data from thermal studies indicate that the PZT incorporated P(BZ-co-CPL) systems possess better T (g) and thermal degradation behavior when compared to the neat P(BZ-co-CPL). The values of dielectric constant are decreased with increasing temperature. From the values, it is ascertained that the P(BZ-co-CPL)/PZT systems exhibit stable dielectric behavior with regard to variation in temperature. The TEM images ascertain the uniform dispersion of PZT in the P(BZ-co-CPL) matrix.
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