泡沫分散体系中镁铝水滑石的插层聚合研究  

Intercalative polymerization of Mg3 Al layered double hydroxides in a foam dispersion system

作　　者：綦峥 刘晓秋 杨巍[2] 

机构地区：[1]黑龙江省疾病控制中心公共卫生监测所,黑龙江哈尔滨150030 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《哈尔滨工程大学学报》2010年第5期669-674,共6页Journal of Harbin Engineering University

基　　金：哈尔滨市科技攻关计划基金资助项目(2005AA5CGO45)

摘　　要：为了实现高单体浓度、高聚合反应速率、高聚合度产物的聚合反应,研究了在泡沫分散体系中镁铝水滑石超细粉与高浓度Na2CO3先碱基化反应,再与丙烯酸(AA)反应生成层片插层前驱体(Mg3Al-LDH-AA),用S2O82-/S2O52-氧化还原生成的自由基引发Mg3Al-LDH-AA与阴离子型单体AA、丙烯酸钠(SA)和阳离子型单体三甲基烯丙基氯化铵(TMAAC)、二甲基-二烯丙基氯化铵(DMDAAC)进行的插层聚合.用示差扫描热分析仪(DSC)监测反应过程热谱,研究泡沫分散体系插层聚合过程动力学特征,并讨论了影响产物性能的各种因素.用XRD图谱衍射峰显示了超细粉体的晶体结构,采用红外光谱对聚两性电解质分子(PMg3Al-LDH-AA-co-PTMAAC-co-PSA-co-PDMDAAC)结构进行了表征.该研究获得了泡沫分散体系插层聚合的动力学数据,开创了用天然水滑石或工业化规模生产的人工水滑石直接制取有机无机插层聚合物的新方法.To obtain products with a high concentration,a high reaction rate and a high degree of polymerization,the basic reaction of Mg3Al layered double hydroxides（Mg3Al-LDH）with high concentrations of Na2CO3 was run in a foam dispersion system.It was then reacted with acrylic acid（AA）to form the intercalative precursor（Mg3Al-LDH-AA）.Using the free radicals generated from S2O28-/S2O52-redox to induce the intercalative polymerization of Mg3Al-LDH-AA with anionic monomer AA,sodium acrylate（SA）and cationic trimethyldiallyl ammonium chloride（TMAAC）monomer,dimethyldially ammonium chloride（DMDAAC）.The reaction process was monitored by a differential scanning calorimeter（DSC）to obtain the kinetic characteristics of intercalative polymerization in the foam dispersion system.Key factors impacting performance were discussed.The crystaline structure of the ultra-fine powder and ampholyte molecules of Mg3Al-LDH-AA-h-PTMAAC-co-PSA-co-PDMDAAC structures were characterized by X-ray diffraction（XRD）and infrared（IR）,respectively.This study provides data on the kinetics of intercalative polymerization in a foam dispersion system.It also describes a new method of direct preparation whereby intercalated organic and inorganic polymers can be obtained by natural or industrial-scale hydrotalcite.

关 键 词：水滑石层片簇插主 插层聚合 无机-有机杂种聚两性电解质 泡沫分散体系 

分 类 号：X13[环境科学与工程—环境科学]