阻燃PVA/APP/LDH混杂体系的流变行为研究  

Rheological Behaviors of Flame-retardant PVA/APP/ LDH Hybrid Systems

作　　者：刘娅[1] 王玉忠[1] 

机构地区：[1]四川大学化学学院环境友好高分子材料教育部工程研究中心,四川成都610064

出　　处：《四川大学学报（工程科学版）》2009年第4期132-135,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家杰出青年科学基金资助项目(50525309)

摘　　要：为提高改善聚乙烯醇(PVA)的阻燃性,采用聚磷酸铵(APP)和层状双氢氧化物(LDH)作为阻燃剂和阻燃协效剂制备了PVA/APP/LDH三元混杂体系。采用平行板流变仪研究了该阻燃混杂体系的流变行为。研究发现,混杂体系在所研究的频率范围内均表现出剪切变稀行为。在PVA的浓度保持9%(w/w,下同),PVA/APP/LDH体系中PVA占85%时,随着LDH含量由1%增加到3%,体系的复数粘度出现先增大后降低的现象。通过储能(G′)模量与损耗模量(G″)、动态力学损耗值(tanδ)、Cole-Cole图、松弛时间等参数的分析,发现该混杂体系在所研究的整个频率范围内始终表现出以粘性为主的流变行为,即G″>G′和tanδ>1。PVA/APP/LDH混杂体系的流变行为比PVA、PVA/APP体系更为复杂。The ternary hybrid systems of PVA/APP/LDH were prepared through the addition of flame retardant,ammonium polyphosphate(APP),and flame-retardant synergist of layered double hydroxide(LDH) to PVA.The rheological behaviors of flame-retardant PVA/APP/LDH hybrid systems were investigated using parallel-plate rheometer.The shear-thinning phenomenon occurred in the hybrid systems within the whole frequency range studied.When the concentration of PVA in aqueous solution was 9%(w/w) and its proportion was 85% in the...

关 键 词：聚乙烯醇 层状双氢氧化合物 混杂体系 流变性 

分 类 号：O631.3[理学—高分子化学]