Supramolecular Control of the Branched Topology of Poly(sulfone-amine) from Divinylsulfone and Hexamethylenediamine
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- 作者：Huishi Wan ; Yan Chen ; Liang Chen ; Xinyuan Zhu ; Deyue Yan ; Bin Li ; Tao Liu ; Ling Zhao ; Xulin Jiang ; Guangzhao Zhang
- 刊名：Macromolecules
- 出版年：2008
- 出版时间：January 22, 2008
- 年：2008
- 卷：41
- 期：2
- 页码：465 - 470
- 全文大小：90K
- 年卷期：v.41,no.2(January 22, 2008)
- ISSN：1520-5835
文摘
A supramolecular method to control the branched topology of polymerized product from the A2+ B4 reaction system has been developed. Depending on the feed ratio, the polycondensation-addition ofdivinylsulfone (DV, an A2 monomer) and hexamethylenediamine (HDA, a B4 monomer) gives a highly branchedpolymer (DV/HDA = 1:1) or chemical cross-linking gel (DV/HDA = 2:1). By introduction of 
-cyclodextrin(-CD) into this reaction system, the HDA molecule is selectively encapsulated into the cavity of -CD.Interestingly, one hydrogen atom of each primary amino group in HDA molecule is physically protected by theCD cavity, so the dendritic unit (HDA molecule) is transformed into a linear unit through the inclusioncomplexation. Therefore, by merely adjusting the amount of -CD, a cross-linking gel, hyperbranched polymer,highly branched polymer, slightly branched polymer, or linear polymer can be obtained, respectively. In short,the branched topology of the polymerized product from the A2 + B4 reaction system can be easily controlled byusing this supramolecular approach.
-cyclodextrin(-CD) into this reaction system, the HDA molecule is selectively encapsulated into the cavity of -CD.Interestingly, one hydrogen atom of each primary amino group in HDA molecule is physically protected by theCD cavity, so the dendritic unit (HDA molecule) is transformed into a linear unit through the inclusioncomplexation. Therefore, by merely adjusting the amount of -CD, a cross-linking gel, hyperbranched polymer,highly branched polymer, slightly branched polymer, or linear polymer can be obtained, respectively. In short,the branched topology of the polymerized product from the A2 + B4 reaction system can be easily controlled byusing this supramolecular approach.