Preparation and Characterization of Flame-Retardant Aluminum Hypophosphite/Poly(Vinyl Alcohol) Composite

详细信息    查看全文

• 作者：Bihe Yuan ; Chenlu Bao ; Yuqiang Guo ; Lei Song ; Kim Meow Liew ; Yuan Hu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：October 31, 2012
• 年：2012
• 卷：51
• 期：43
• 页码：14065-14075
• 全文大小：620K
• 年卷期：v.51,no.43(October 31, 2012)
• ISSN：1520-5045

文摘

Composites based on poly(vinyl alcohol) (PVA) and aluminum hypophosphite (AHP) are prepared by solvent blending. The thermal, mechanical, and crystallinity properties of the composites are studied. AHP remarkably improves the char residue yield during the thermal degradation and combustion of AHP/PVA composites. The flame retardancy of the composites is obviously improved. The increased char which protects underlying PVA from heat and oxygen is one of the key reasons for the improved flame retardancy. The crystallinity of the composites is decreased. The glass transition temperature (T_g) and the storage modulus of the composites are increased. In the composite with 15 wt % AHP, limiting oxygen index (LOI) reaches 28.0%, UL-94 V-0 rating is obtained, T_g is increased by 7 掳C, and the storage modulus is increased by 17.2% in comparison with neat PVA. Moreover, AHP/PVA composites keep high transparence and maintain most of the mechanical properties of PVA, which is advantageous for the practical application of the composites.