改性聚酰胺-胺阴离子树状聚合物的性能研究.pdf

石油化工
2011年第40卷第8期
PETROCHEMICAL TECHNOLOGY
889?
石油化工新材料
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改性聚酰胺一胺阴离子树状聚合物的性能硏究
彭晓春…,彭晓宏3,赵建青,彭密军
(1.吉首大学林产化工工程湖南省重点实验室,湖南张家界42700082.吉首大学化学化工学院,湖南吉首416000;
3.华南理工大学材料科学与工程学院,广东广州510640)
摘要]研究了改性聚酰胺一胺( PAMAM)阴离子树状聚合物的特性黏数([n])、热稳定性和絮凝性能。实验结果表明,该类树状聚
合物的!随代数的增加先増大后减小,出现一个极大值。 PAMAM/丙烯酸钠(SAA)、含聚氧乙烯(PFEO)链端的 PAMAM/SAA
( PAMAM/SAA/PEO)阴离子树状聚合物的『n1极大值分別出现在第4.0代附近、第5.0-6.0代附近;随PEO相对分子质量的增加
PAMAM/SAA/PEO阴离子树状聚合物的[m减小。热分析结果表明,改性 PAMAM阴离子树状聚合物具有逐层热分解行为,热稳定
性与分子外围端基有关, PAMAM/SAA/PEO阴离子树状聚合物具有更好的热稳定性,最大热失重速率对应的温度可达388℃。改
性 PAMAM阴离子树状聚合物具有一定的絮凝性能,絮凝性能随代数、PEO链长的增加而增蝨;改性 PAMAN阴离子树状聚合物的
最佳浓度为30mg/L(不是所有的改性 PAMAN阴离子树状聚合物的最佳浓度都是30mg/L),上层清液的透光率达85%以上。
关键词]聚酰胺一胺阴离子树状聚合物;丙烯酸钠;特性黏数;热稳定性;絮凝性能
[文章编号]1000-8144(2011)08-088-06
中图分类号1TQ317.5「文献标识码】A
Characterization of Modified Polyamidoamine Anionic Dendrimer
Peng Xiaochun: 2, Peng Xiaohong, Zhao Jianging', Peng Mijun
(I Key Laboraory of Hunan Forest Products and Chemical Industry Engineering. Jishou University, Zhangjiajie Hunan 4270, China
2. College of Chemistry and Chemical Engineering, Jishou University, Jishou Hunan 416000, China
3. College of Materials Science and Engineering, South China University of Technology, Guangzhou Guangdong 510640, China)
Abstract The intrinsic viscosities, thermal stabilities and floc ulations of the modified polyamidoamine
(PAMAM )anionic dendrimers were studied. The results showed that the intrinsic viscosities of the
dendrimers increased at first and then decreased with the increasc of the generation number. The maximum
intrinsic viscosities of PAMAM/ um acrylate(SAA and PAMAM/SAA/polyox ethylene(PAMAM
SAA/PEO anionic dendrimers were at about G4. 0 and between G5. 0 and G6.0, respectively. The
intrinsic viscosities of PAMAM/SAA/PEO anionic dendrimers decreased with the increase of the number-
average relative molecular mass of PEO macromonomers. The thermal analysis indicated that thermal
decomposition of the modified PAMAM anionic dendrimer was of multiple steps, and the thermal stability
depended on the exterior terminal groups. PAMAM/SAA/PEO anionic dendrimer has better thermal
lity than the others, according to its maximum mass loss rate at 388 C. The modified PAMAM anionic
dendrimers could easily flocculate. The flocculation would become stronger with increasing the generation
umber and the PEO chain length. The optimal mass concentration of the modified PAMAM anionic
dendrimer is about 30 mg/L with over 85% transmittance of the upside clear liquid
Keywords] polyamidoamine anionic dendrimer; sodium acrylate; intrinsic viscosity; thermal stability
flocculation
在树状聚合物研究的最初阶段,研究者主要研越来越多-5。 Aharoni等?在测定第0代~第9
究树状聚合物的合成,即具有精确化学结构树状聚
合物的合成方法,对树状聚合物的物理性能硏究很
收稿日期2011-02-L修政稿日期!2011-04-20
少。由于树状聚合物表现出来的潜在应用价值,其
作者简介」彭晓春(1964一),女,湖南省永县人,博士,教授,电
话0743-8563911,电邮pnfxz(@126.com
物理性能逐渐被重视,关于树状聚合物的黏度、热「基金项目林产化工工程湖南省重点实验室开放基金资助项目
稳定性和玻璃化转变温度等物理性能的硏究报道(JDZ2004);湖南省自然科学基金资助项目(0612067)