摘要
以四氢呋喃为溶剂,通过溶液层离/重组法制备了聚氯乙烯(PVC)/层状双氢氧化物(LDH)纳米复合材料。采用TEM、XRD、FTIR和TGA等手段研究了十二烷基单磷酸根离子(PK)改性的层状双氢氧化物(LDH-PK)及其纳米复合材料的结构与性能,并系统考察了各种制备条件对纳米复合材料结构的影响。XRD和TEM结果表明,剥离型纳米复合材料可通过减少LDH在聚合物中的含量及在四氢呋喃中的浓度和增加层离时间等条件获得;剥离的LDH片层无序的分散在PVC基材中。TGA结果表明,纳米复合材料相比于纯PVC具有更好的热稳定性;以30%失重为比较点,当LDH的质量百分含量为2%时,纳米复合材料的热降解温度比纯PVC高出近16℃,并能显著促进PVC成炭。
Exfoliated polyvinyl chloride（PVC）/MgAI layered double hydroxide（LDH） nanocomposites were synthesized by a solution delamination-restacking method through tetrahydrofuran（THF） as solvent. The structures of laurylether phosphate modified LDH and PVC/LDH nanocomposites were characterized by FTIR, XRD, TEM and TGA. The effects of preparation conditions including the content of LDH in PVC matix, the concentration and delamination time of LDH in TFIF on the structure of nanocomposites were studied. The XRD and TEM results show completely exfoliated LDH layers can be achieved by decreasing the content of LDH and the concentration of LDH in THF, elongating the delamination time of LDH in THF, and exfoliated LDH layers disorderedly disperse in the PVC matrix. The TGA results show that PVC/LDH nanocomposites have significantly enhanced thermal stability. When 30% weight loss is selected as a point of comparison, the thermal decomposition temperature of exfoliated PVC/LDH nanocomposite with 2% LDH is 16℃ higher than that of pristine PVC. The char residue of these nanocomposites at 650 ℃ is increased by the presence of LDH.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第13期26-29,36,共5页
Journal of Wuhan University of Technology
基金
湖北省教育厅科学技术研究项目(B20081702)
