引用本文:
杜满泉, 史林启, 安英丽, 李湛勇, 何炳林. 聚苯乙烯-丙烯酸嵌段共聚物在Ca2+或乙二胺存在下的自组装行为[J]. 应用化学,
2001, 18(11): 915-917.
Citation: DU Man-Quan, SHI Lin-Qi, AN Ying-Li, LI Zhan-Yong, HE Bing-Lin. The Self-assembly of P(S-b-AA) Block Copolymer in the Presence of Ca2+ or NH2CH2CH2NH2 in Selective Solvents[J]. Chinese Journal of Applied Chemistry, 2001, 18(11): 915-917.
Citation: DU Man-Quan, SHI Lin-Qi, AN Ying-Li, LI Zhan-Yong, HE Bing-Lin. The Self-assembly of P(S-b-AA) Block Copolymer in the Presence of Ca2+ or NH2CH2CH2NH2 in Selective Solvents[J]. Chinese Journal of Applied Chemistry, 2001, 18(11): 915-917.
聚苯乙烯-丙烯酸嵌段共聚物在Ca2+或乙二胺存在下的自组装行为
摘要:
近10年来,人们对于具有纳米尺度聚合物自组装结构的研究日益增多.其中,嵌段共聚物在选择性溶剂中的胶束行为的研究非常引人瞩目[1~3].其表现出诸多常规尺寸所不具备的特殊性能,使得纳米胶束不仅在理论上有研究价值,而且在材料化学、生物医学和环境科学等领域都具有广阔的应用前景.Ma等[4]对聚丙烯酸和聚苯乙烯接枝共聚物的研究发现聚合物接枝率和聚合物浓度以及溶液离子强度对胶束结构有影响;Zhang等[1,5]对不同嵌段比例的苯乙烯-丙烯酸嵌段共聚物的自组装行为的研究,发现不同嵌段比例所对应的纳米结构不同;而胶束表面活性基团与小分子之间的相互作用对胶束的形成与稳定性的影响未有深入的研究报道.本文报道聚苯乙烯-丙烯酸嵌段共聚物[P(S-b-AA)]在选择性溶剂中的自组装行为,着重讨论钙离子和乙二胺与聚丙烯酸链段相互作用对自组装行为的影响.
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关键词:
- 苯乙烯-丙烯酸嵌段共聚物
- / 自组装
- / 乙二胺
English
The Self-assembly of P(S-b-AA) Block Copolymer in the Presence of Ca2+ or NH2CH2CH2NH2 in Selective Solvents
Abstract:
The self-assemble behavior of amphiphilic poly(styrene-b-acrylic acid), P(S-b-AA), in selective solvents was studied by dynamic light scattering(DLS). The diameters of micellae were found to be decreased and then increased with the increase in the concentration of the calcium ion in solvent. The average diameter of micellae was minimum when the concentration of the CaCl2 was 0.2 g/L. In addition, the distribution of micellae became narrow with the increase in the ethylenediamine concentration.
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Key words:
- poly(styrene-b-acrylic acid)
- / self-assembly
- / ethylenediamine
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